{"id":180610,"date":"2026-08-17T08:30:48","date_gmt":"2026-08-17T08:30:48","guid":{"rendered":"https:\/\/pabau.com\/?p=180610"},"modified":"2026-08-17T08:30:50","modified_gmt":"2026-08-17T08:30:50","slug":"icd-10-code-s63631d","status":"publish","type":"post","link":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/","title":{"rendered":"ICD-10 Code S63.631D: Left index finger sprain, subsequent encounter"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"ICD-10 Code S63.631D: Sprain of Interphalangeal Joint of Left Index Finger, Subsequent Encounter\",\"description\":\"ICD-10 Code S63.631D (Sprain of Interphalangeal Joint of Left Index Finger, Subsequent Encounter) is a billable FY2026 diagnosis code. Learn the 7th character rules, code hierarchy, documentation requirements, and related codes.\",\"url\":\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s63631d\/\",\"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\":\"2026-02-15\",\"dateModified\":\"2026-02-15\"}<\/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>S63.631D is a billable ICD-10-CM code for a sprain of the interphalangeal joint of the left index finger at a subsequent encounter.<\/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 7th character D means active treatment is finished. The patient is now in follow-up, rehabilitation, or physical therapy.<\/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 valid for FY2026, from October 1, 2025 through September 30, 2026. Your notes must confirm laterality, joint specificity, and encounter type.<\/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>Practice management software like Pabau builds ICD-10 coding into the billing workflow, so 7th character errors get caught before claims go out.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">ICD-10 Code S63.631D is a billable diagnosis code for a sprain of the interphalangeal joint of the left index finger, subsequent encounter. The 7th character D tells the payer that active treatment has ended and the patient is back for follow-up care.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pabau.com\/industry\/physical-therapy-emr\/\">Physical therapy practices<\/a>, chiropractic offices, and urgent care providers use it for those return visits. It is valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The code covers both interphalangeal joints of that finger, so PIP and DIP sprains share it. Only the phase of care changes the 7th character.<\/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-code-at-a-glance\" class=\"wp-block-heading\">Code at a glance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The table below is a quick reference for the essential facts about S63.631D.<\/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\">S63.631D<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Short description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left index finger, subsequent encounter<\/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, billable for reimbursement<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Effective date<\/td>\n<td style=\"padding:12px 16px;color:#374151\">October 1, 2025<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Valid through<\/td>\n<td style=\"padding:12px 16px;color:#374151\">September 30, 2026 (FY2026)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">7th character<\/td>\n<td style=\"padding:12px 16px;color:#374151\">D = subsequent encounter<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code set<\/td>\n<td style=\"padding:12px 16px;color:#374151\">ICD-10-CM (United States)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Parent category<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S63.6: Other and unspecified sprain of finger(s)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 id=\"h-code-description-and-clinical-meaning\" class=\"wp-block-heading\">Code description and clinical meaning<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This code carries three pieces of information: injury type, joint, and side of the body.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sprain vs. other finger injuries.<\/strong> A sprain involves stretching or tearing of the ligaments that stabilize a joint. It differs from a fracture (broken bone), a dislocation (displaced joint), and a strain (muscle or tendon injury). Coding a sprain as a fracture creates claim errors and can trigger audits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Interphalangeal joint.<\/strong> The index finger has two interphalangeal joints. They are the proximal interphalangeal (PIP) joint and the distal interphalangeal (DIP) joint. S63.631D covers a sprain at either one.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the notes specify PIP or DIP, record that detail in the chart. The code does not distinguish between the two, but the specificity supports the clinical picture if the claim is reviewed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Left laterality.<\/strong> ICD-10-CM requires laterality documentation, and this code explicitly designates the left hand. Using it for a right index finger sprain is a coding error. The right-side equivalent is S63.630D.<\/p>\n\n\n\n<h2 id=\"h-the-7th-character-a-d-and-s\" class=\"wp-block-heading\">The 7th character: A, D, and S<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The base code S63.631 covers sprains of the interphalangeal joint of the left index finger at any stage. The 7th character records which stage of care the visit represents. Choosing the wrong one is a common reason finger sprain claims get denied or returned.<\/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\">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\">Typical clinical scenario<\/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\">S63.631A<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A (initial)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Initial encounter<\/td>\n<td style=\"padding:12px 16px;color:#374151\">First visit for active treatment, in the emergency department, urgent care, or primary care<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.631D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">D (subsequent)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent encounter<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Physical therapy follow-up, chiropractic manipulation, suture removal, cast check, or routine wound care<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.631S<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S (sequela)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sequela<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Late effect after the injury has healed, such as chronic joint instability or stiffness months later<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 id=\"h-when-to-use-a-d-or-s\" class=\"wp-block-heading\">When to use A, D, or S<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/icd10cmtool.cdc.gov\/\" target=\"_blank\" rel=\"nofollow noopener\">ICD-10-CM Official Guidelines<\/a>, Section I.C.19, govern which 7th character applies.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Use A<\/strong> for every visit where active treatment is being administered, whoever provides it. The emergency department visit, the orthopedic consultation, and the first physical therapy evaluation all qualify.<\/li>\n\n\n\n<li><strong>Use D<\/strong> once active treatment is complete and the patient is receiving routine or aftercare services. Physical therapy (PT) follow-ups, chiropractic adjustments for an existing complaint, and routine wound checks all use D.<\/li>\n\n\n\n<li><strong>Use S<\/strong> only when documenting the residual effect of a healed injury. Chronic joint laxity that appears six months later, documented as a separate ongoing condition, uses S.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A common mistake is using A for every physical therapy visit because the patient is \u00ab\u00a0still treating.\u00a0\u00bb Under ICD-10-CM guidelines, active treatment means care directed at the injury itself during the acute phase. Ongoing PT visits after that phase are subsequent encounters and take D.<\/p>\n\n\n\n<h2 id=\"h-icd-10-cm-code-hierarchy-for-s63-631d\" class=\"wp-block-heading\">ICD-10-CM code hierarchy for S63.631D<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing where S63.631D sits in the <a href=\"https:\/\/www.cms.gov\/medicare\/coding-billing\/icd-10-codes\" target=\"_blank\" rel=\"nofollow noopener\">CMS ICD-10-CM code set<\/a> helps you navigate related codes and check category-level inclusion notes.<\/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\">Level<\/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\">Code \/ Range<\/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<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Chapter<\/td>\n<td style=\"padding:12px 16px;color:#374151\">19<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Injury, poisoning and certain other consequences of external causes<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Block<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S00-T88<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Injuries, poisoning and certain other consequences of external causes<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Block<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S60-S69<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Injuries to the wrist and hand<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Category<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S63<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Dislocation and sprain of joints and ligaments of wrist and hand<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Subcategory<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S63.6<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Other and unspecified sprain of finger(s)<\/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 stem<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S63.631<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left index finger<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Full code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">S63.631D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left index finger, subsequent encounter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 id=\"h-approximate-synonyms-in-clinical-notes\" class=\"wp-block-heading\">Approximate synonyms in clinical notes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ICD-10-CM includes notes that list clinically accepted synonyms mapping to S63.631D. Coders at <a href=\"https:\/\/pabau.com\/industry\/chiropractic-software\/\">chiropractic practices<\/a> and occupational health practices meet these alternate wordings in charts and payer correspondence.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sprain of left index finger interphalangeal joint, subsequent encounter<\/li>\n\n\n\n<li>Left index finger ligament sprain, follow-up visit<\/li>\n\n\n\n<li>Left index finger IP joint sprain, subsequent encounter<\/li>\n\n\n\n<li>Sprained left index finger (interphalangeal), subsequent encounter<\/li>\n\n\n\n<li>Left index finger joint sprain, subsequent encounter<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These wordings show up in crosswalk tools and encoder software. When a referring physician writes \u00ab\u00a0left index IP joint sprain,\u00a0\u00bb you can map it to S63.631D for a follow-up visit.<\/p>\n\n\n\n<h2 id=\"h-subsequent-encounter-coding-rules-under-icd-10-cm\" class=\"wp-block-heading\">Subsequent encounter coding rules under ICD-10-CM<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Section I.C.19 of the ICD-10-CM Official Guidelines sets the framework for injury coding across encounter types. For Chapter 19 musculoskeletal codes, the 7th character D applies across many clinical settings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key rules for applying D correctly:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The active treatment phase for the sprain has finished, so the injury is no longer in acute management.<\/li>\n\n\n\n<li>The current visit is for rehabilitation, physical therapy follow-up, cast or splint monitoring, or routine wound care.<\/li>\n\n\n\n<li>The provider&rsquo;s identity does not decide the 7th character. The nature of the care does, so the original treating clinician still uses D at follow-up.<\/li>\n\n\n\n<li>A new provider meeting the patient for the first time in the follow-up phase also uses D, provided no new active treatment starts.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-documentation-requirements\" class=\"wp-block-heading\">Documentation requirements<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Clinicians at occupational therapy practices, physical therapy practices, and urgent care centers need specific elements in the record to support this code. Home health therapy visits billed under <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-g0152\/\">G0152<\/a> carry the same requirement. Missing any element creates audit risk and can lead to denial.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Laterality.<\/strong> The notes must say \u00ab\u00a0left\u00a0\u00bb hand or finger. An unqualified \u00ab\u00a0index finger sprain\u00a0\u00bb does not support S63.631D.<\/li>\n\n\n\n<li><strong>Joint specificity.<\/strong> The record should name the interphalangeal joint, whether PIP, DIP, or simply \u00ab\u00a0IP joint.\u00a0\u00bb A bare \u00ab\u00a0left index finger sprain\u00a0\u00bb is less specific, though it may still map here.<\/li>\n\n\n\n<li><strong>Encounter type.<\/strong> The record must show this is a follow-up visit rather than initial active treatment. Reference the plan of care, progress since the last visit, or routine monitoring.<\/li>\n\n\n\n<li><strong>Mechanism of injury.<\/strong> Keeping the original injury mechanism in the chart supports audit defense and continuity of care, even though a follow-up visit does not require it.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Practices using <a href=\"https:\/\/pabau.com\/features\/patient-intake-software\/\">digital intake forms<\/a> can standardize laterality and joint-level fields, so clinicians capture these details at every visit without relying on free text. Written home-program instructions help as well, and good <a href=\"https:\/\/pabau.com\/blog\/patient-education\/\">patient education<\/a> gives your progress notes something concrete to record.<\/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-s63631d\/customizable-consent-and-intake-forms.webp\" alt=\"Customizable consent and intake forms\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&rsquo;s customizable intake and consent forms build laterality and joint fields into the visit, so the record supports the 7th character you bill.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\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>Flag subsequent encounter visits in your scheduling system when the appointment is booked. A status tag on the appointment tells the coder to pick D instead of A before the claim is generated. Catching it at that point costs nothing.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">A code missing its 7th character is not a valid ICD-10-CM code at all, so the claim fails before a reviewer ever sees it. That rule sits inside the standards governing <a href=\"https:\/\/pabau.com\/blog\/hipaa-compliance-for-medical-offices\/\">HIPAA-covered transactions<\/a>.<\/p>\n\n\n\n<h2 id=\"h-related-icd-10-codes-for-finger-and-hand-sprains\" class=\"wp-block-heading\">Related ICD-10 codes for finger and hand sprains<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S63.631D belongs to a family of finger sprain codes inside the S63.6 subcategory. Sports medicine and hand therapy practices reference these sibling codes when treating multiple-finger or bilateral injuries. The <a href=\"https:\/\/www.aapc.com\/codes\/icd-10-codes-range\/\" target=\"_blank\" rel=\"nofollow noopener\">AAPC ICD-10 lookup<\/a> gives you a searchable view of the full S63 category.<\/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\">Encounter<\/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\">S63.631A<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left index finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Initial<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.631D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left index finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.631S<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left index finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sequela<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.630D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of right index finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.632D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of right middle finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.633D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left middle finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.634D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of right ring finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">S63.637D<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sprain of interphalangeal joint of left little finger<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Subsequent<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">For workers&rsquo; compensation cases involving hand injuries, laterality and finger-specific coding across the S63.6x range decide whether the claim clears. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Payers run automated edits that flag any mismatch between the documented injured side and the laterality in the code. Fracture codes carry a longer 7th character list than sprains do, as <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-s42302k\/\">S42.302K<\/a> shows.<\/p>\n\n\n\n<h2 id=\"h-how-claims-software-prevents-7th-character-errors\" class=\"wp-block-heading\">How claims software prevents 7th character errors<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A wrong 7th character usually surfaces when the denial arrives. Someone pulls the chart, confirms the visit was follow-up care, changes A to D, and resubmits. The claim was clinically correct all along, but the practice waits another billing cycle for the money.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practice management software like Pabau keeps the diagnosis code attached to the treatment note rather than in a separate billing queue. Pabau&rsquo;s <a href=\"https:\/\/pabau.com\/features\/claims-management-software\/\">claims management software<\/a> carries that note into the claim. Whoever codes the visit can see the plan of care and the visit history while they work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a left index finger sprain, that means the coder can tell at a glance whether this is visit one or visit six. Every Pabau subscription includes the full billing and claims toolset, so the check does not depend on which plan you are on.<\/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-s63631d\/fully-integrated-with-pabau-billing.webp\" alt=\"Fully integrated with Pabau billing\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&rsquo;s billing runs on the same client record as the treatment note, so the code you document reaches the claim unchanged.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\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                    Code follow-up visits right the first time                <\/h3>\n\n                <p class=\"description\">\n                    Pabau keeps diagnosis codes on the treatment note and carries them straight into the claim. Subsequent encounter visits leave your practice with the right 7th character, so you get fewer corrections and faster payment.                <\/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 practice 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\">The choice between A, D, and S is a judgment about the phase of care, and the chart has to show that judgment. If the note reads like a follow-up visit, D is defensible. If it reads like the start of active treatment, it is not.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Build the check into the visit rather than the billing review. A scheduling tag, an intake field for laterality, and a note template naming the plan of care do most of the work. They catch 7th character errors that a post-denial audit finds far too late.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pabau.com\/book-demo\/\">Book a demo<\/a> to see how Pabau handles ICD-10 coding and claims for physical therapy, chiropractic, and sports medicine practices.<\/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>Rehabilitating a nerve injury?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/brachial-neuritis-exercises\/\">Brachial neuritis exercises<\/a> sets out a phased program you can document across follow-up visits.<\/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 follow-up care?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/medicare-billing\/\">Medicare billing<\/a> walks through the claiming channels and the compliance checks behind them.<\/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 a debridement instead?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-11043\/\">CPT code 11043<\/a> covers the billing rules for muscle and fascia debridement.<\/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>Running home health plans of care?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-g0162\/\">G0162<\/a> explains how skilled nursing visits are billed against the plan of care.<\/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-1786714457725\"><h3 class=\"schema-faq-question\">What does ICD-10 Code S63.631D mean?<\/h3> <p class=\"schema-faq-answer\">ICD-10 Code S63.631D is a billable diagnosis code for a sprain of the interphalangeal joint of the left index finger at a subsequent encounter. The 7th character D indicates the patient&rsquo;s active treatment phase is complete and the current visit is for follow-up, rehabilitation, or routine monitoring.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786714457726\"><h3 class=\"schema-faq-question\">Is S63.631D a billable ICD-10 code?<\/h3> <p class=\"schema-faq-answer\">Yes. S63.631D is a billable, specific ICD-10-CM code valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 (FY2026). It can be used on claims for reimbursement without requiring a more specific code.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786714457727\"><h3 class=\"schema-faq-question\">What is the difference between S63.631A and S63.631D?<\/h3> <p class=\"schema-faq-answer\">S63.631A applies to the initial encounter when active treatment for the sprain is being administered. S63.631D applies to subsequent encounters once active treatment is complete and the patient is receiving follow-up care, physical therapy, or routine monitoring. The injury is the same. Only the phase of care differs.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786714457728\"><h3 class=\"schema-faq-question\">When should I use the 7th character D in ICD-10?<\/h3> <p class=\"schema-faq-answer\">Use the 7th character D for any visit where the patient is receiving care after the active treatment phase has ended. Physical therapy follow-up visits, chiropractic adjustments for an existing complaint, splint checks, and routine wound care all qualify as subsequent encounters. ICD-10-CM Official Guidelines Section I.C.19 sets out the rule.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786714457729\"><h3 class=\"schema-faq-question\">Can S63.631D be used for physical therapy billing?<\/h3> <p class=\"schema-faq-answer\">Yes. S63.631D is frequently used in physical therapy billing for follow-up visits treating a left index finger interphalangeal joint sprain. The visit note must document that active treatment is complete and the patient is progressing through a rehabilitation plan of care. Payer coverage policies vary, so verify with individual payers before submitting.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786714457730\"><h3 class=\"schema-faq-question\">What is the difference between S63.631D and S63.631S?<\/h3> <p class=\"schema-faq-answer\">S63.631D is used during the follow-up phase of an active, recent sprain. S63.631S (sequela) applies when the injury has resolved but a late effect or residual condition persists. Chronic joint instability appearing months after the original sprain is the classic example. Sequela coding requires documenting both the residual condition and the original injury as the cause.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>ICD-10 Code S63.631D is a billable diagnosis code for a sprain of the interphalangeal joint of the left index finger, subsequent encounter. The 7th character D tells the payer that active treatment has ended and the patient is back for follow-up care. Physical therapy practices, chiropractic offices, and urgent care providers use it for those [&hellip;]<\/p>\n","protected":false},"author":83,"featured_media":180608,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"89","_yoast_wpseo_content_score":"60","_yoast_wpseo_is_cornerstone":"","_yoast_wpseo_keywordsynonyms":"[\"\",\"\",\"\",\"\",\"\",\"\"]","_yoast_wpseo_focuskw_text_input":"","_seo_original_html":"","footnotes":""},"categories":[1549,1550],"tags":[2972,1543,2394],"class_list":["post-180610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diagnostic-codes","category-icd-10-cm","tag-clinical-coding","tag-clinical-documentation","tag-coding-compliance"],"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 S63.631D: When to use D instead of A (FY2026)<\/title>\n<meta name=\"description\" content=\"S63.631D covers a left index finger IP joint sprain at follow-up. Use D once active treatment ends, not for the first visit.\" \/>\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\/fr\/diagnostic-codes\/icd-10-code-s63631d\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICD-10 Code S63.631D: When to use D instead of A (FY2026)\" \/>\n<meta property=\"og:description\" content=\"S63.631D covers a left index finger IP joint sprain at follow-up. 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The 7th character D indicates the patient's active treatment phase is complete and the current visit is for follow-up, rehabilitation, or routine monitoring.\",\"inLanguage\":\"fr-FR\"},\"inLanguage\":\"fr-FR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/diagnostic-codes\\\/icd-10-code-s63631d\\\/#faq-question-1786714457726\",\"position\":2,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/diagnostic-codes\\\/icd-10-code-s63631d\\\/#faq-question-1786714457726\",\"name\":\"Is S63.631D a billable ICD-10 code?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. S63.631D is a billable, specific ICD-10-CM code valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 (FY2026). 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Only the phase of care differs.\",\"inLanguage\":\"fr-FR\"},\"inLanguage\":\"fr-FR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/diagnostic-codes\\\/icd-10-code-s63631d\\\/#faq-question-1786714457728\",\"position\":4,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/diagnostic-codes\\\/icd-10-code-s63631d\\\/#faq-question-1786714457728\",\"name\":\"When should I use the 7th character D in ICD-10?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use the 7th character D for any visit where the patient is receiving care after the active treatment phase has ended. Physical therapy follow-up visits, chiropractic adjustments for an existing complaint, splint checks, and routine wound care all qualify as subsequent encounters. 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She enjoys breaking down complex topics into clear, accessible content and has a soft spot for the often-overlooked aspects of clinic life. When she's not writing, she's exploring cafes, walking her dog, or spending time with friends and family.","url":"https:\/\/pabau.com\/fr\/blog\/author\/anja-dodevska\/"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457725","position":1,"url":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457725","name":"What does ICD-10 Code S63.631D mean?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"ICD-10 Code S63.631D is a billable diagnosis code for a sprain of the interphalangeal joint of the left index finger at a subsequent encounter. The 7th character D indicates the patient's active treatment phase is complete and the current visit is for follow-up, rehabilitation, or routine monitoring.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457726","position":2,"url":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457726","name":"Is S63.631D a billable ICD-10 code?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. S63.631D is a billable, specific ICD-10-CM code valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 (FY2026). It can be used on claims for reimbursement without requiring a more specific code.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457727","position":3,"url":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457727","name":"What is the difference between S63.631A and S63.631D?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"S63.631A applies to the initial encounter when active treatment for the sprain is being administered. S63.631D applies to subsequent encounters once active treatment is complete and the patient is receiving follow-up care, physical therapy, or routine monitoring. The injury is the same. Only the phase of care differs.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457728","position":4,"url":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457728","name":"When should I use the 7th character D in ICD-10?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Use the 7th character D for any visit where the patient is receiving care after the active treatment phase has ended. Physical therapy follow-up visits, chiropractic adjustments for an existing complaint, splint checks, and routine wound care all qualify as subsequent encounters. ICD-10-CM Official Guidelines Section I.C.19 sets out the rule.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457729","position":5,"url":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457729","name":"Can S63.631D be used for physical therapy billing?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. S63.631D is frequently used in physical therapy billing for follow-up visits treating a left index finger interphalangeal joint sprain. The visit note must document that active treatment is complete and the patient is progressing through a rehabilitation plan of care. Payer coverage policies vary, so verify with individual payers before submitting.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457730","position":6,"url":"https:\/\/pabau.com\/fr\/diagnostic-codes\/icd-10-code-s63631d\/#faq-question-1786714457730","name":"What is the difference between S63.631D and S63.631S?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"S63.631D is used during the follow-up phase of an active, recent sprain. S63.631S (sequela) applies when the injury has resolved but a late effect or residual condition persists. Chronic joint instability appearing months after the original sprain is the classic example. Sequela coding requires documenting both the residual condition and the original injury as the cause.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"}]}},"yoast":{"focus_keyword":"ICD-10 Code S63.631D","seo_title":"ICD-10 Code S63.631D: When to use D instead of A (FY%%currentyear%%)","meta_description":"S63.631D covers a left index finger IP joint sprain at follow-up. Use D once active treatment ends, not for the first visit.","content_score":"60","is_cornerstone":"","related_keyphrases":[{"keyword":"subsequent encounter ICD-10 coding rules","score":56},{"keyword":"S63.631 7th character","score":61},{"keyword":"interphalangeal joint sprain coding","score":61},{"keyword":"ICD-10 hand sprain codes 2026","score":56},{"keyword":"physical therapy billing finger sprain ICD-10","score":56}]},"_links":{"self":[{"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/posts\/180610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/users\/83"}],"replies":[{"embeddable":true,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/comments?post=180610"}],"version-history":[{"count":3,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/posts\/180610\/revisions"}],"predecessor-version":[{"id":181169,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/posts\/180610\/revisions\/181169"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/media\/180608"}],"wp:attachment":[{"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/media?parent=180610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/categories?post=180610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pabau.com\/fr\/wp-json\/wp\/v2\/tags?post=180610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}