{"id":180791,"date":"2026-08-17T07:46:22","date_gmt":"2026-08-17T07:46:22","guid":{"rendered":"https:\/\/pabau.com\/?p=180791"},"modified":"2026-08-17T11:08:55","modified_gmt":"2026-08-17T11:08:55","slug":"icd-10-code-s42302k","status":"publish","type":"post","link":"https:\/\/pabau.com\/es\/diagnostic-codes\/icd-10-code-s42302k\/","title":{"rendered":"ICD-10 code S42.302K: Bill a left humerus nonunion"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"ICD-10 code S42.302K: Bill a left humerus nonunion\",\"description\":\"ICD-10 code S42.302K reports an unspecified fracture of the shaft of the humerus, left arm, at a subsequent encounter with nonunion. Billable for FY 2026, with seventh-character rules, documentation requirements and CPT pairings.\",\"url\":\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s42302k\/\",\"audience\":{\"@type\":\"MedicalAudience\",\"audienceType\":\"Clinician\"},\"reviewedBy\":{\"@type\":\"Person\",\"name\":\"Dr Vanja Kitanova\",\"jobTitle\":\"Medical Reviewer\",\"affiliation\":{\"@type\":\"Organization\",\"name\":\"Pabau\"},\"knowsAbout\":[\"Medical Coding\",\"Clinical Documentation\",\"Healthcare Billing\",\"Clinical Safety\"],\"sameAs\":\"https:\/\/pabau.com\/blog\/author\/vanja\/\"},\"datePublished\":\"2026-01-28\",\"dateModified\":\"2026-08-17\"}<\/script>\n\n\n        <div id=\"key_takeaways\">\n            <div class=\"header\">\n                                    <img decoding=\"async\" src=\"https:\/\/pabau.com\/wp-content\/uploads\/2025\/12\/Key-Takeaways-Icon.svg\" alt=\"Key takeaways\" height=\"42\" width=\"42\">\n                                <h3>Key takeaways<\/h3>\n            <\/div>\n            <div class=\"list\">\n                                                            <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>ICD-10 code S42.302K reports an unspecified fracture of the shaft of the left humerus at a follow-up visit with confirmed nonunion.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>The code is billable for FY 2026 on CMS-1500 and UB-04 claims. S42.302 accepts seven valid seventh characters: A, B, D, G, K, P and S.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>Imaging alone will not support the K. The physician has to write nonunion, failed union or pseudarthrosis in the note.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>Nonunion repair pairs with CPT 24430 or 24435, not with 24515 and 24516, which treat acute fractures.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>S42.302K and S42.302P are never used together. The fracture either failed to unite or healed in the wrong position, not both.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">Six months after a break, the bone still has not knit, and the diagnosis code has to say so. That is what S42.302K covers: an unspecified fracture of the left humeral shaft, at a follow-up visit, with the fracture confirmed as a nonunion. It is billable for FY 2026, effective October 1, 2025, and payers accept it on both CMS-1500 and UB-04 claims.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Getting the code onto the claim is the easy part. Keeping it there is where practices lose money. Three things have to line up first: left-side laterality, a visit after active treatment ends, and the word nonunion in the physician&#8217;s own note. Here is what a billing team checks first.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"ICD-10 Revisions: Stay Updated or Fall Behind\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/bqAyb-BCA0w?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 id=\"h-s42-302k-covers-a-left-humerus-shaft-fracture-that-never-healed\" class=\"wp-block-heading\">S42.302K covers a left humerus shaft fracture that never healed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The code sits in ICD-10-CM chapter 19, inside block S40-S49 for injuries to the shoulder and upper arm. Here are the core facts before the harder rules.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Field<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Detail<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42.302K<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Full description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified fracture of shaft of humerus, left arm, subsequent encounter for fracture with nonunion<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Billable \/ specific<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Valid for CMS-1500 \/ UB-04<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">FY effective date<\/td>\n<td style=\"padding:12px 16px;color:#374151\">October 1, 2025 (FY 2026)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Valid seventh characters<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A, B, D, G, K, P, S<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">ICD-10-CM chapter<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code block<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S40-S49: Injuries to the shoulder and upper arm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 id=\"h-every-character-in-s42-302k-tells-the-payer-something\" class=\"wp-block-heading\">Every character in S42.302K tells the payer something<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Read the code from left to right, and each segment narrows the picture. Get one segment wrong, and the claim either denies at the clearinghouse or turns up in an audit sample later.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Segment<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Value<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Meaning<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Category<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Fracture of shoulder and upper arm<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Subcategory<\/td>\n<td style=\"padding:12px 16px;color:#374151\">.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Fracture of shaft (diaphysis) of humerus<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Pattern + laterality<\/td>\n<td style=\"padding:12px 16px;color:#374151\">.302<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified fracture pattern, left arm<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Seventh character<\/td>\n<td style=\"padding:12px 16px;color:#374151\">K<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent encounter for fracture with nonunion<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">The word \u00abunspecified\u00bb in .302 means the note never named the fracture pattern. Once the physician does name it, a more specific subcategory takes over instead.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Greenstick fractures use S42.311, S42.312 and S42.319 for right, left and unspecified arm, while displaced transverse fractures use S42.321, S42.322 and S42.329. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oblique, spiral and comminuted patterns each get their own subcategory too, split the same way by side. Coding to the exact pattern, whenever the physician documents it, keeps medical necessity queries down.<\/p>\n\n\n\n<h2 id=\"h-where-s42-302k-sits-in-the-icd-10-cm-hierarchy\" class=\"wp-block-heading\">Where S42.302K sits in the ICD-10-CM hierarchy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing the ladder saves time when you are auditing a batch of claims or hunting for a sibling code.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>S00-T88<\/strong>: Injury, Poisoning and Certain Other Consequences of External Causes (Chapter 19)<\/li>\n\n\n\n<li><strong>S40-S49<\/strong>: Injuries to the shoulder and upper arm<\/li>\n\n\n\n<li><strong>S42<\/strong>: Fracture of shoulder and upper arm<\/li>\n\n\n\n<li><strong>S42.3<\/strong>: Fracture of shaft of humerus<\/li>\n\n\n\n<li><strong>S42.30<\/strong>: Unspecified fracture of shaft of humerus<\/li>\n\n\n\n<li><strong>S42.302<\/strong>: Unspecified fracture of shaft of humerus, left arm<\/li>\n\n\n\n<li><strong>S42.302K<\/strong>: Subsequent encounter for fracture with nonunion (billable leaf code)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S42.302 is a parent code, so it cannot go on a claim by itself. It needs a seventh character. This family accepts seven of them: A, B, D, G, K, P and S. Submitting the parent code alone is a routine clearinghouse rejection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B and G are the two that rarely make it onto a cheat sheet. B marks an initial encounter for an open fracture. G, meanwhile, marks a subsequent encounter where healing is running behind schedule, but nobody has called it a nonunion yet, as in <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s42475g\/\">S42.475G<\/a>.<\/p>\n\n\n\n<h2 id=\"h-excludes-notes-keep-s42-302k-off-the-wrong-claim\" class=\"wp-block-heading\">Excludes notes keep S42.302K off the wrong claim<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chapter 19 uses Excludes notes to fence codes off from one another. Two sit at the S42 category level and one sits at S42.3, directly above this code.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Note<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Sits at<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">What it points to<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Excludes1<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Traumatic amputation of shoulder and upper arm (S48.-)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Excludes2<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Periprosthetic fracture around internal prosthetic shoulder joint (M97.3-)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Excludes2<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Physeal fracture of upper end of humerus (S49.0-) and of lower end of humerus (S49.1-)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Excludes1 means never together. If the limb was traumatically amputated at that level, the S48.- codes take over instead, as in <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s48922s\/\">S48.922S<\/a>. The fracture code does not ride along beside it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Excludes2 works the other way: the conditions are different, but one patient can have both. A fracture around a shoulder implant is an M97.3- problem. A growth-plate injury in a skeletally immature patient, though, goes to S49.0- or S49.1-, not the shaft subcategory.<\/p>\n\n\n\n<h2 id=\"h-what-counts-as-nonunion-in-the-humeral-shaft\" class=\"wp-block-heading\">What counts as nonunion in the humeral shaft<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nonunion means the fracture has stopped trying to heal. The humeral shaft runs from just below the surgical neck to the supracondylar ridge. Fractures there account for 1% to 5% of all fractures, according to <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK448074\/\" target=\"_blank\" rel=\"nofollow noopener\">StatPearls<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most unite within 8 to 12 weeks in a functional brace, but a meaningful share do not. Conservatively treated closed fractures carry a reported nonunion rate of 3% to 17.6%. That is why follow-up imaging matters even on a case that looks straightforward.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Six months is the usual working definition. Union that has not arrived by then is generally called nonunion, though the call stays clinical and radiographic rather than calendar-based. One early marker is worth knowing, too. No callus and persistent motion at the site, six weeks after injury, predicts nonunion almost every time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Risk climbs sharply when any of the following are in play.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open fracture, or infection at the fracture site<\/li>\n\n\n\n<li>Inadequate immobilization, or distraction across the fracture<\/li>\n\n\n\n<li>Smoking, and poorly controlled blood glucose<\/li>\n\n\n\n<li>Regular NSAID use<\/li>\n\n\n\n<li>Osteoporosis<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The type of nonunion matters for what comes next. Atrophic nonunion means the biology failed, so the surgeon usually adds a graft. Hypertrophic nonunion means the fixation moved instead, so the answer is stability rather than biology. Neither changes the diagnosis code, but each changes the CPT code sitting beside it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For coding purposes, the word matters more than the picture. The physician has to write nonunion, failed union or pseudarthrosis. A radiologist&#8217;s impression, after all, does not carry the diagnosis unless the treating physician signs off on it. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Orthopedic and <a href=\"https:\/\/pabau.com\/industry\/sports-medicine-software\/\">sports medicine<\/a> practices often run rehab alongside nonunion management, so the notes have to agree across providers.<\/p>\n\n\n\n<h2 id=\"h-subsequent-encounter-means-active-treatment-is-over\" class=\"wp-block-heading\">Subsequent encounter means active treatment is over<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A subsequent encounter is any visit after the patient has received active treatment for the fracture. That is the definition in the <a href=\"https:\/\/www.cms.gov\/medicare\/coding-billing\/icd-10-codes\" target=\"_blank\" rel=\"nofollow noopener\">ICD-10-CM Official Guidelines<\/a>, and it is narrower than \u00abany follow-up appointment.\u00bb<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">7th character<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Encounter type<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">When to use it<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Initial encounter, closed fracture<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Active treatment of a closed fracture: the ED visit, urgent care, the first orthopedic consult, surgery<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">B<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Initial encounter, open fracture<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Same phase as A, but the fracture broke the skin<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent, routine healing<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Follow-up while the bone knits as expected, including most cast and post-op checks<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">G<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent, delayed healing<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Healing is behind schedule, but the fracture has not been called a nonunion<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">K<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent, nonunion<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Follow-up where the fracture has failed to unite, confirmed clinically and radiographically<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">P<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent, malunion<\/td>\n<td style=\"padding:12px 16px;color:#374151\">The fracture healed, but in the wrong position<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sequela<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Late effects once healing is finished, such as chronic pain or deformity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">One point trips people up: the same provider keeps using A for every active-treatment visit, even across several surgeries. The switch to D, G, K or P happens once active treatment ends and the patient moves into monitoring or aftercare.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The character follows the fracture&#8217;s phase, not your first look at the patient. Someone arriving with an established nonunion from another practice still gets K as the seventh character. So does the encounter where you operate to repair it, since that surgery treats the failed healing rather than the original break.<\/p>\n\n\n\n<h2 id=\"h-nonunion-or-malunion-the-k-and-p-split\" class=\"wp-block-heading\">Nonunion or malunion: The K and P split<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mixing up K and P is the costliest seventh-character error in humeral shaft coding. Both say something went wrong with healing, but they describe different problems, with different surgeries behind them.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Feature<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Nonunion (K)<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Malunion (P)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Definition<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Fracture fragments fail to unite<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Fracture heals in abnormal alignment or position<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Radiographic finding<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Persistent fracture line, sclerotic margins, motion at the site<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Bridging callus present, but angulated or rotated<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Left humerus shaft code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42.302K<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S42.302P<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Typical treatment<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Bone grafting, revision fixation, electrical stimulation<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Corrective osteotomy, plating, realignment surgery<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Documentation trigger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Physician writes \u00abnonunion\u00bb, \u00abfailed union\u00bb or \u00abpseudarthrosis\u00bb<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Physician writes \u00abmalunion\u00bb, \u00abdeformity\u00bb, \u00abangulation\u00bb or \u00abmalalignment\u00bb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Never assign K and P for the same fracture. The bone either failed to unite or united badly, and when the note reads both ways, query the physician before the claim goes out.<\/p>\n\n\n\n<h2 id=\"h-sibling-codes-worth-keeping-on-the-shortlist\" class=\"wp-block-heading\">Sibling codes worth keeping on the shortlist<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Coders working this part of S42 need the neighbors close at hand: same site, different encounter type, or same encounter type, different side.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Description<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Key distinction<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302A<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Initial encounter, closed fracture<\/td>\n<td style=\"padding:12px 16px;color:#374151\">The first active-treatment visit<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302B<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Initial encounter, open fracture<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Active treatment where the bone broke the skin<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent encounter, routine healing<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Standard follow-up while the fracture heals<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302G<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent encounter, delayed healing<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Slow healing, short of a nonunion diagnosis<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302K<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent encounter, nonunion (this code)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Follow-up with confirmed nonunion<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302P<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent encounter, malunion<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Healed, but in an abnormal position<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.302S<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sequela<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Late effects after healing is complete<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.301K<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified fracture of shaft of humerus, right arm, nonunion<\/td>\n<td style=\"padding:12px 16px;color:#374151\">The right-arm counterpart<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S42.309K<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified fracture of shaft of humerus, unspecified arm, nonunion<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Only when laterality is genuinely undocumented<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">The same seventh-character logic repeats across every S42 subcategory, including <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s42242k\/\">S42.242K<\/a> and <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s42256p\/\">S42.256P<\/a>. For year-specific tabular browsing, the <a href=\"https:\/\/icd10cmtool.cdc.gov\/\" target=\"_blank\" rel=\"nofollow noopener\">CDC ICD-10-CM web tool<\/a> refreshes each October with the new fiscal year codes.<\/p>\n\n\n\n<h2 id=\"h-what-the-physician-has-to-write-before-you-can-code-k\" class=\"wp-block-heading\">What the physician has to write before you can code K<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Everything here turns on the physician&#8217;s words, not the coder&#8217;s reading of an imaging report. Miss one element, and you are looking at a technical denial or a medical necessity appeal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is where <a href=\"https:\/\/pabau.com\/features\/medical-records-management\/\">patient record management<\/a> earns its keep. A documentation checklist in front of the provider, right at the point of care, catches most of these before the patient leaves.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.pabau.com\/cdn\/attachments\/pulse\/content-engine\/diagnostic_codes\/icd-10-code-s42302k\/comprehensive-emr-patient-record-management.webp\" alt=\"Comprehensive EMR and patient record management in Pabau\"\/><figcaption class=\"wp-element-caption\"><em>The client record holds the nonunion note, the X-ray report and the injury date, so the coder can check all three in one place.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>An explicit nonunion diagnosis.<\/strong> The physician writes \u00abnonunion\u00bb, \u00abfailed union\u00bb or \u00abpseudarthrosis\u00bb. A radiologist&#8217;s impression only counts once the treating physician co-signs it.<\/li>\n\n\n\n<li><strong>Laterality in this note.<\/strong> \u00abLeft arm\u00bb or \u00ableft upper extremity\u00bb has to appear in the current encounter note, not only in the original injury record.<\/li>\n\n\n\n<li><strong>Subsequent encounter context.<\/strong> The note has to read as follow-up care rather than a first evaluation of a fresh fracture.<\/li>\n\n\n\n<li><strong>Radiographic evidence.<\/strong> Reference an X-ray, CT or MRI showing absent bridging callus or a persistent fracture line. Payers ask for it on review.<\/li>\n\n\n\n<li><strong>Time since injury.<\/strong> An injury date or a phrase like \u00abseven months post-injury\u00bb explains why nonunion is the right call.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Practices running high volumes of orthopedic follow-ups get there fastest with templated progress notes. Build the five elements into the template, and the provider just confirms them by exception instead of remembering them from scratch at every visit.<\/p>\n\n\n        <div id=\"pro_tip\">\n            <div class=\"img\">\n                <svg width=\"42\" height=\"42\" viewBox=\"0 0 42 42\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M12.6383 19.5238C12.6632 21.2071 12.8734 22.9926 12.0685 24.5523C11.0341 26.8917 8.45076 28.169 7.56292 30.5918C6.63082 33.1061 7.19505 36.185 9.31371 37.9786C10.929 39.5678 13.4183 39.9873 15.6061 39.5463C17.4592 39.073 19.1049 37.8388 19.9706 36.1608C20.781 34.7141 20.7866 32.9904 20.5293 31.3985C20.1006 29.3092 18.3775 27.8705 16.9807 26.362C14.8814 24.1005 14.6684 20.6854 15.595 17.8915C16.4331 15.4768 19.0026 14.2344 20.0425 11.9461C20.7202 10.6769 20.7506 9.20327 20.6068 7.81304C20.1864 5.40098 18.3139 3.23631 15.8716 2.56674C13.9742 2.03969 11.8224 2.30052 10.1739 3.37614C8.70522 4.34688 7.5878 5.86618 7.28356 7.58178C6.76081 9.82981 7.53525 12.2822 9.20307 13.9118C10.7658 15.4741 12.4806 17.2273 12.6383 19.5238Z\"\n                        fill=\"#2BADD4\" \/>\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M22.7048 19.8387C22.6822 22.3279 24.4507 24.6234 26.7493 25.4682C28.0531 25.961 29.4725 25.9183 30.7989 25.5487C32.0575 24.9955 33.301 24.2237 34.0069 23.0092C34.8384 21.5811 35.2982 19.8286 34.7832 18.2094C34.3611 16.2507 32.8739 14.6541 31.0275 13.9426C28.6736 12.9595 25.8073 13.7942 24.1719 15.7001C23.2022 16.8366 22.6143 18.3326 22.7048 19.8387Z\"\n                        fill=\"#2BADD4\" \/>\n                <\/svg>\n            <\/div>\n            <div class=\"text\">\n                <h3>Pro Tip<\/h3>\n                <p>Audit your K claims monthly. Pull every claim submitted with seventh character K and read the matching note. Check that the word nonunion, or an accepted equivalent, appears in the assessment or impression. Claims where K was applied without that language are the most common trigger for a payer recoupment request in orthopedic practices.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-how-the-claim-moves-and-where-it-stalls\" class=\"wp-block-heading\">How the claim moves, and where it stalls<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A nonunion claim passes through four sets of hands before a payer ever sees it. The physician documents, the coder assigns S42.302K, the biller scrubs the claim, and the clearinghouse runs its edits. Most stalls happen at the last two steps, though nearly all of them trace back to the first.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.pabau.com\/cdn\/attachments\/pulse\/content-engine\/diagnostic_codes\/icd-10-code-s42302k\/automate-claims-through-healthcode.webp\" alt=\"Automate claims and billing with Pabau\"\/><figcaption class=\"wp-element-caption\"><em>The claim builds from the encounter record, so the code a coder approved is the code that reaches the payer.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Then come the payer-side rules that decide how the claim gets read.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Claim forms.<\/strong> S42.302K is valid on CMS-1500 for physician and outpatient billing, and on UB-04 for facility billing.<\/li>\n\n\n\n<li><strong>Code ordering.<\/strong> Report S42.302K first when the nonunion is the reason for the visit. If the encounter addresses a complication such as infection or hardware failure, that code takes the principal position.<\/li>\n\n\n\n<li><strong>External cause codes.<\/strong> Chapter 19 expects a code from V00-Y99 to explain how the original injury happened. Many payer contracts treat it as mandatory on trauma claims.<\/li>\n\n\n\n<li><strong>Coverage.<\/strong> Grafting, revision surgery and electrical bone stimulation all turn on medical necessity and your MAC&#8217;s local policy. Blanket coverage is never safe to assume.<\/li>\n\n\n\n<li><strong>Annual review.<\/strong> Code validity is fiscal-year specific, so re-check S42.302K each October 1 against the updated tabular list.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Payers often ask for the clinical rationale behind revision surgery. Sending a <a href=\"https:\/\/pabau.com\/templates\/medical-necessity-letter\/\">medical necessity letter<\/a> up front, though, beats working an appeal after the denial lands.<\/p>\n\n\n\n<h3 id=\"h-before-you-submit-a-seven-point-check\" class=\"wp-block-heading\">Before you submit: A seven-point check<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The note says nonunion, failed union or pseudarthrosis, in the physician&#8217;s own words.<\/li>\n\n\n\n<li>\u00abLeft\u00bb appears in this encounter&#8217;s note, not only in the original injury record.<\/li>\n\n\n\n<li>Active treatment of the original fracture is finished, so the visit really is subsequent.<\/li>\n\n\n\n<li>Imaging from this episode is referenced, with a date.<\/li>\n\n\n\n<li>The diagnosis line reads S42.302K, and the parent code appears nowhere on the form.<\/li>\n\n\n\n<li>Any procedure code on the claim describes nonunion treatment, not acute fracture care.<\/li>\n\n\n\n<li>An external cause code is attached if the payer&#8217;s contract calls for one.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-the-cpt-code-you-pair-with-s42-302k-decides-if-the-claim-survives\" class=\"wp-block-heading\">The CPT code you pair with S42.302K decides if the claim survives<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S42.302K rarely travels alone. It sits beside a procedure code describing what happened at the visit, and this pairing is where humeral shaft claims most often go wrong.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The two codes coders reach for out of habit, 24515 and 24516, actually treat acute humeral shaft fractures. They belong with seventh character A instead. Nonunion repair has its own pair: use 24430 when no graft is taken, and 24435 when the surgeon harvests an iliac or other autograft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">24435 already includes obtaining the graft, so it never gets a separate harvest code beside it. The bone-graft harvest codes belong with 24430 instead, where the graft was not built into the procedure.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">CPT code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Procedure description<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Clinical context<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">24430<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Repair of nonunion or malunion, humerus, without graft<\/td>\n<td style=\"padding:12px 16px;color:#374151\">The primary nonunion repair code for S42.302K<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">24435<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Repair of nonunion or malunion, humerus, with iliac or other autograft, includes obtaining graft<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Nonunion repair with autograft. Harvest is bundled, so no separate graft code<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">20900<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Bone graft, any donor area; minor or small<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Reported alongside 24430 only, never with 24435<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">20902<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Bone graft, any donor area; major or large<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Larger structural harvest, again with 24430 only<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">20974<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Electrical stimulation to aid bone healing; noninvasive (nonoperative)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Adjunct or standalone nonunion treatment at an office visit<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">24515<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Open treatment of humeral shaft fracture with plate and screws<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Acute fracture treatment, which pairs with seventh character A<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">24516<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Treatment of humeral shaft fracture with insertion of intramedullary implant<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Acute fracture treatment, which pairs with seventh character A<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">99213-99215<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Office or other outpatient visit, established patient<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Follow-up with no procedure. 99213 is low MDM, 99214 moderate, 99215 high<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 id=\"h-a-worked-example-start-to-finish\" class=\"wp-block-heading\">A worked example, start to finish<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Here is how that plays out. A patient comes back seven months after a left humeral shaft fracture treated in a brace. Imaging shows no bridging callus, and the surgeon documents an atrophic nonunion. She then plates the humerus and takes an iliac crest graft in the same session.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That claim reads S42.302K with 24435, and nothing extra for the graft. Had she used 24430 instead, the harvest becomes separately reportable with <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-20900\/\">20900<\/a> or <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-20902\/\">20902<\/a>, depending on its size.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When no procedure happens, the visit is simply an E\/M service. A nonunion recheck with imaging review often lands at <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-99214\/\">99214<\/a>, though the level follows the medical decision making rather than the diagnosis. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Teams running post-surgical rehab on a <a href=\"https:\/\/pabau.com\/industry\/physical-therapy-emr\/\">physical therapy EMR<\/a>, meanwhile, report therapy codes against the same diagnosis instead.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Either way, pairings are payer-specific. Confirm medical necessity linkage and your MAC&#8217;s local coverage determinations before you submit surgical codes with S42.302K.<\/p>\n\n\n\n<h2 id=\"h-terms-in-the-chart-that-map-to-s42-302k\" class=\"wp-block-heading\">Terms in the chart that map to S42.302K<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Physicians describe this condition in half a dozen ways, and none of them matches the tabular wording exactly. Recognizing the variants saves a query on every second note.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Humeral shaft fracture nonunion, left arm<\/li>\n\n\n\n<li>Left humerus diaphysis fracture with failed healing<\/li>\n\n\n\n<li>Broken left upper arm with nonunion<\/li>\n\n\n\n<li>Left arm pseudarthrosis following humeral shaft fracture<\/li>\n\n\n\n<li>Left humerus shaft fracture, failed union<\/li>\n\n\n\n<li>Nonunion of fracture of shaft of left humerus<\/li>\n\n\n\n<li>Left humeral diaphyseal fracture nonunion<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Any of these supports S42.302K, as long as the treating physician writes it, the visit is a subsequent encounter, and the left side is confirmed.<\/p>\n\n\n\n<h2 id=\"h-how-pabau-keeps-fracture-claims-clean\" class=\"wp-block-heading\">How Pabau keeps fracture claims clean<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most nonunion denials start in the chart, not on the claim form. The imaging sits in one system, the physician&#8217;s note sits in another, and the claim gets built from whichever screen the biller had open. By the time the denial arrives, nobody can find the sentence that would have supported the K.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practice management software like Pabau keeps all of it in one client record. The encounter note, the uploaded imaging report and the injury date live in the same place. The codes attached to the visit sit right beside them, so a coder reads the evidence and the claim on the same screen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From there, Pabau&#8217;s <a href=\"https:\/\/pabau.com\/features\/claims-management-software\/\">claims management software<\/a> builds and submits the claim from that same record, then tracks what the payer sends back. Nothing gets retyped between the note and the form, which is exactly where a seventh character usually goes astray.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For an orthopedic practice with a heavy load of fracture follow-ups, that changes the timing. You catch a thin note while the patient is still in the room, instead of chasing a denial six weeks later.<\/p>\n\n\n        <div id=\"book_a_demo\">\n            <div class=\"left-side\">\n                <div class=\"logo\">\n                    <img decoding=\"async\"\n                        src=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/01\/Logo.svg\"\n                        alt=\"Logo\"\n                        loading=\"lazy\"\n                    \/>\n                <\/div>\n\n                <h3 class=\"heading\">\n                    Keep coding evidence and claims in one record                <\/h3>\n\n                <p class=\"description\">\n                    Pabau brings the encounter note, imaging and claim together in one client record. Your coders can check the documentation behind a seventh character before the claim goes out.                <\/p>\n\n                <div class=\"button-group\">\n                    <a href=\"\/book-demo\/\" class=\"btn btn-scale-effect btn-cta-color btn-md\">\n                        <span class=\"btn-text\">Book a demo<\/span>\n                        <div class=\"btn-icon btn-icon-right\" aria-hidden=\"true\">\n                            <svg\n                                width=\"14\"\n                                height=\"12\"\n                                viewBox=\"0 0 14 12\"\n                                fill=\"none\"\n                                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                            >\n                                <path\n                                    d=\"M0.75 4.77295C0.335786 4.77295 0 5.10874 0 5.52295C0 5.93716 0.335786 6.27295 0.75 6.27295V5.52295V4.77295ZM13.2803 6.05328C13.5732 5.76039 13.5732 5.28551 13.2803 4.99262L8.50736 0.219648C8.21447 -0.073245 7.73959 -0.073245 7.4467 0.219648C7.15381 0.512542 7.15381 0.987415 7.4467 1.28031L11.6893 5.52295L7.4467 9.76559C7.15381 10.0585 7.15381 10.5334 7.4467 10.8263C7.73959 11.1191 8.21447 11.1191 8.50736 10.8263L13.2803 6.05328ZM0.75 5.52295V6.27295L12.75 6.27295V5.52295V4.77295L0.75 4.77295V5.52295Z\"\n                                    fill=\"currentColor\"\n                                ><\/path>\n                            <\/svg>\n                        <\/div>\n                    <\/a>\n                <\/div>\n            <\/div>\n\n            <div class=\"right-side\">\n                <img decoding=\"async\"\n                    src=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/01\/Home-Page-Concept-4.webp\"\n                    alt=\"Pabau claims management dashboard\"\n                    loading=\"lazy\"\n                \/>\n            <\/div>\n        <\/div>\n        \n\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S42.302K is a narrow code doing a specific job. It says the left humeral shaft never united, and that the active treatment phase is behind you. Almost everything that decides whether it gets paid happens before the claim is even built.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the real work sits upstream. Get the physician writing the word nonunion, keep the side documented in every follow-up note, and hold the imaging against the episode. Then look hard at the procedure code beside it, because pairing nonunion repair with an acute fracture code is the error that costs the most.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Specificity cuts both ways: a precise code is easier to defend on review, and harder to earn in the first place. <a href=\"https:\/\/pabau.com\/book-demo\/\">Book a demo<\/a> to see how Pabau keeps fracture documentation, coding and claims in one record.<\/p>\n\n\n        <div id=\"expert_picks\">\n            <div class=\"header\">\n                                    <img decoding=\"async\" src=\"https:\/\/pabau.com\/wp-content\/uploads\/2025\/11\/Expert-Picks.svg\" alt=\"Continue your research\" height=\"42\" width=\"42\">\n                                <h3>Continue your research<\/h3>\n            <\/div>\n            <div class=\"content\">\n                                                            <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Rehabbing the arm once the fracture unites?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/brachial-neuritis-exercises\/\">Brachial neuritis exercises<\/a> sets out a phased upper-limb protocol you can slot into follow-up care.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Coding another fracture repair this week?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21452\/\">21452<\/a> walks through percutaneous fixation and the documentation payers expect behind it.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Need the open-treatment counterpart?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21465\/\">21465<\/a> covers open treatment of a mandibular condylar fracture, billing rules included.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Explaining a nonunion to a worried patient?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/patient-education\/\">Patient education<\/a> collects the materials and tactics that make the conversation shorter.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Billing Medicare for the revision surgery?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/medicare-billing\/\">Medicare billing<\/a> covers claiming channels and the compliance checks that hold claims up.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1786721540218\"><h3 class=\"schema-faq-question\">Do CPT lines for S42.302K need the LT modifier?<\/h3> <p class=\"schema-faq-answer\">Usually, yes. The diagnosis code already carries laterality, but most payers still want the side confirmed on the procedure line. Append LT to the surgical line for a left humerus, unless the payer&#8217;s own policy says otherwise.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786721540219\"><h3 class=\"schema-faq-question\">Can a physical therapist report S42.302K?<\/h3> <p class=\"schema-faq-answer\">Yes, once the physician&#8217;s documentation supports the nonunion. The therapist reports the same diagnosis alongside that visit&#8217;s treatment codes. A therapist cannot establish the nonunion independently, though, so the referral or the surgeon&#8217;s note has to carry it.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786721540220\"><h3 class=\"schema-faq-question\">Do you need a separate code for the original fracture visit?<\/h3> <p class=\"schema-faq-answer\">No. ICD-10-CM tracks the whole episode under one code family. The seventh character simply changes as treatment moves from initial care to follow-up to any late effects. S42.302K already marks this as a follow-up, not a first look at a fresh break, so no second code is needed.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786721540221\"><h3 class=\"schema-faq-question\">How do you bill nonunion repair inside a global period?<\/h3> <p class=\"schema-faq-answer\">Add a global surgery modifier. An unplanned return to the operating room for a related procedure is normally modifier 78. Check the payer&#8217;s policy first, though, since the right modifier depends on how that return gets classified.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786721540222\"><h3 class=\"schema-faq-question\">Does Medicare cover a bone growth stimulator for humeral nonunion?<\/h3> <p class=\"schema-faq-answer\">Coverage exists, but it is conditional. Medicare expects radiographic evidence that the fracture has not united, usually serial films taken months apart. Your MAC&#8217;s policy article sets the exact interval, though, along with the records to keep on file.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>S42.302K covers a left humerus shaft fracture that never united. Read more on the seventh characters, documentation and the CPT pairings that get it paid.<\/p>\n","protected":false},"author":85,"featured_media":180790,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"82","_yoast_wpseo_content_score":"90","_yoast_wpseo_is_cornerstone":"","_yoast_wpseo_keywordsynonyms":"[\"\",\"\",\"\",\"\"]","_yoast_wpseo_focuskw_text_input":"","_seo_original_html":"","footnotes":""},"categories":[1549,1550],"tags":[1363,1305],"class_list":["post-180791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diagnostic-codes","category-icd-10-cm","tag-icd-10","tag-icd-10-codes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>ICD-10 code S42.302K: Bill a left humerus nonunion<\/title>\n<meta name=\"description\" content=\"ICD-10 code S42.302K covers a left humerus shaft fracture that never united. See 7th characters, documentation, and CPT pairings.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pabau.com\/es\/diagnostic-codes\/icd-10-code-s42302k\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICD-10 code S42.302K: Bill a left humerus nonunion\" \/>\n<meta property=\"og:description\" content=\"ICD-10 code S42.302K covers a left humerus shaft fracture that never united. 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S42.302K already marks this as a follow-up, not a first look at a fresh break, so no second code is needed.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/diagnostic-codes\/icd-10-code-s42302k\/#faq-question-1786721540221","position":4,"url":"https:\/\/pabau.com\/es\/diagnostic-codes\/icd-10-code-s42302k\/#faq-question-1786721540221","name":"How do you bill nonunion repair inside a global period?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Add a global surgery modifier. An unplanned return to the operating room for a related procedure is normally modifier 78. Check the payer's policy first, though, since the right modifier depends on how that return gets classified.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/diagnostic-codes\/icd-10-code-s42302k\/#faq-question-1786721540222","position":5,"url":"https:\/\/pabau.com\/es\/diagnostic-codes\/icd-10-code-s42302k\/#faq-question-1786721540222","name":"Does Medicare cover a bone growth stimulator for humeral nonunion?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Coverage exists, but it is conditional. Medicare expects radiographic evidence that the fracture has not united, usually serial films taken months apart. Your MAC's policy article sets the exact interval, though, along with the records to keep on file.","inLanguage":"es"},"inLanguage":"es"}]}},"yoast":{"focus_keyword":"ICD-10 code S42.302K","seo_title":"ICD-10 code S42.302K: Bill a left humerus nonunion","meta_description":"ICD-10 code S42.302K covers a left humerus shaft fracture that never united. See 7th characters, documentation, and CPT pairings.","content_score":"90","is_cornerstone":"","related_keyphrases":[{"keyword":"fracture nonunion icd 10 code","score":56},{"keyword":"subsequent encounter fracture icd 10","score":56},{"keyword":"orthopedic fracture coding guidelines","score":61}]},"_links":{"self":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts\/180791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/users\/85"}],"replies":[{"embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/comments?post=180791"}],"version-history":[{"count":4,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts\/180791\/revisions"}],"predecessor-version":[{"id":181335,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts\/180791\/revisions\/181335"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/media\/180790"}],"wp:attachment":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/media?parent=180791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/categories?post=180791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/tags?post=180791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}