{"id":163315,"date":"2026-07-27T11:53:18","date_gmt":"2026-07-27T11:53:18","guid":{"rendered":"https:\/\/pabau.com\/?p=163315"},"modified":"2026-08-17T12:21:12","modified_gmt":"2026-08-17T12:21:12","slug":"icd-10-code-l52","status":"publish","type":"post","link":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/","title":{"rendered":"ICD-10 Code L52: Erythema nodosum diagnosis, coding, and documentation"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"ICD-10 Code L52: Erythema Nodosum Diagnosis, Coding, and Documentation\",\"description\":\"ICD-10 Code L52 covers erythema nodosum (panniculitis with tender shin nodules). Learn billable status, excludes notes, documentation requirements, and related codes.\",\"url\":\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-l52\/\",\"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\":\"2026-07-24\",\"dateModified\":\"2026-07-24\"}<\/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 L52 is a billable ICD-10-CM code for erythema nodosum, a panniculitis presenting as tender erythematous nodules on the anterior shins<\/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>L52 is valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 under the FY2026 release<\/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>An Excludes1 note means tuberculosis erythema nodosum (A18.4) must never be coded alongside L52; miscoding this is a common denial trigger<\/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>Pabau&#8217;s claims management software and digital intake forms help dermatology and skin practices assign and audit codes like L52 with HIPAA-compliant documentation<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">ICD-10 Code L52 is the billable ICD-10-CM code for erythema nodosum, a panniculitis that presents as tender, erythematous nodules, most often on the anterior shins. It&#8217;s valid for HIPAA-covered transactions under the FY2026 release, effective October 1, 2025 through September 30, 2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The code carries an Excludes1 note. When tuberculosis is the underlying cause, A18.4 applies instead, and the two codes can never be billed together. Here&#8217;s how to code L52 correctly, document it defensibly, and avoid the mismatch that gets claims kicked back.<\/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-icd-10-code-l52-code-details-and-validity\" class=\"wp-block-heading\">ICD-10 Code L52: Code details and validity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ICD-10 Code L52 is a billable, specific ICD-10-CM code with no further sub-codes. It applies to erythema nodosum without a confirmed tuberculous cause. For practices using HIPAA-compliant practice software, accurate code assignment feeds directly into cleaner claims and fewer audit flags.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The table below summarizes the core metadata for L52 as published in the FY2026 ICD-10-CM Tabular List, effective October 1, 2025 through September 30, 2026.<\/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\">Value<\/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\">ICD-10-CM Code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">L52<\/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\">Erythema nodosum<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Long Description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Erythema nodosum<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\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\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Valid for HIPAA<\/td>\n<td style=\"padding:12px 16px;color:#374151\">October 1, 2025 through September 30, 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\">ICD-10-CM Chapter<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)<\/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\">L49-L54: Urticaria and erythema<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">ICD-9-CM Equivalent<\/td>\n<td style=\"padding:12px 16px;color:#374151\">695.2 (Erythema nodosum)<\/td>\n<\/tr>\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\">Tuberculosis erythema nodosum (A18.4)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Per the <a href=\"https:\/\/icd10cmtool.cdc.gov\/\" target=\"_blank\" rel=\"nofollow noopener\">ICD-10-CM web tool<\/a>, L52 carries no sub-codes. It is a terminal, specific code with no further specificity breakdowns within the L52 category itself.<\/p>\n\n\n\n<h2 id=\"h-clinical-description-of-erythema-nodosum\" class=\"wp-block-heading\">Clinical description of erythema nodosum<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Erythema nodosum is a delayed hypersensitivity reaction of the dermis and subcutaneous fat, classified formally as a panniculitis. It presents as tender, erythematous nodules, most commonly on the anterior shins, though lesions can also appear on the calves, thighs, and forearms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The nodules typically range from 1 to 5 cm in diameter. They start as bright red, raised lesions, then evolve over one to two weeks through a bruise-like color progression from purple to yellow-green before resolving. This color shift is what separates erythema nodosum from M79.3.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Location:<\/strong> Anterior shins (most common), calves, thighs, occasionally forearms<\/li>\n\n\n\n<li><strong>Morphology:<\/strong> Tender, erythematous, indurated nodules 1-5 cm<\/li>\n\n\n\n<li><strong>Color progression:<\/strong> Bright red to purple to yellow-green over 1-2 weeks<\/li>\n\n\n\n<li><strong>Systemic signs:<\/strong> May accompany fever, arthralgias, malaise<\/li>\n\n\n\n<li><strong>Resolution:<\/strong> Usually self-limiting within 3-6 weeks; no ulceration, no scarring<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The absence of ulceration is a clinically important negative finding to document. Ulcerating nodules suggest a different diagnosis and a different ICD-10 code assignment.<\/p>\n\n\n\n<h2 id=\"h-etiology-and-associated-conditions\" class=\"wp-block-heading\">Etiology and associated conditions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Erythema nodosum is rarely idiopathic in adults. An underlying trigger is identified in roughly 50% of cases, and ICD-10-CM Official Guidelines Section I.C requires dual-coding that condition alongside L52 once it&#8217;s established and documented.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practices using skin clinic software that supports multi-code entries avoid the manual workarounds that undercode claims.<\/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\">Associated Condition<\/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\">ICD-10-CM 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\">Coding Note<\/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\">Sarcoidosis (unspecified)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">D86.9<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Code additionally; L52 first if erythema nodosum is the presenting problem<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Streptococcal pharyngitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">J02.0<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Most common infectious trigger; dual-code when documented<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Crohn&#8217;s disease (unspecified)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">K50.90<\/td>\n<td style=\"padding:12px 16px;color:#374151\">IBD is a well-established trigger; sequence per reason for 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\">Drug-induced (adverse effect)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T36-T50 range + L52<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use adverse effect code for causative agent; L52 for the manifestation<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Pregnancy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">O26.89 or relevant O-code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Pregnancy-related erythema nodosum follows obstetric coding conventions<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Idiopathic (no identified cause)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">L52 only<\/td>\n<td style=\"padding:12px 16px;color:#374151\">No additional etiology code; document work-up performed and inconclusive result<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Our comparison of <a href=\"https:\/\/pabau.com\/blog\/aesthetic-emr-software\/\">EMRs for aesthetic practices<\/a> shows which platforms handle dermatology documentation well.<\/p>\n\n\n\n<h2 id=\"h-excludes-notes-and-coding-pitfalls-for-icd-10-code-l52\" class=\"wp-block-heading\">Excludes notes and coding pitfalls for ICD-10 Code L52<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The single most important rule for L52 is its Excludes1 note. Under ICD-10-CM conventions, an Excludes1 note means the excluded condition is mutually exclusive with the code bearing the note. These two codes should never appear together on the same claim.<\/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\">Exclusion 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\">Excluded 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\">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\">Excludes1<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A18.4 (Tuberculosis of skin and subcutaneous tissue, including tuberculosis erythema nodosum)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">These codes represent mutually exclusive conditions. L52 and A18.4 must NEVER be coded together.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">ICD-10 Code L52 applies only when erythema nodosum has no documented tuberculous cause. If confirmed mycobacterial disease is the underlying trigger, A18.4 is the correct code instead, and L52 is excluded entirely. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The exclusion isn&#8217;t unique to dermatology. ICD-10-CM treats tuberculosis as a code-changing detail across chapters, not only in skin conditions.<\/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-l52\/hipaa-compliance-in-pabau.webp\" alt=\"HIPAA compliance in Pabau\"\/><figcaption class=\"wp-element-caption\"><em>HIPAA compliance in Pabau<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Three common miscoding scenarios to avoid:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coding L52 when the chart documents active tuberculosis (use A18.4, not L52)<\/li>\n\n\n\n<li>Coding L52 and A18.4 together on the same claim (Excludes1 prohibits this)<\/li>\n\n\n\n<li>Omitting the underlying etiology code when sarcoidosis or streptococcal infection is documented<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-documentation-requirements-for-l52\" class=\"wp-block-heading\">Documentation requirements for L52<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dermatology and primary care practices billing L52 need documentation that supports both the clinical diagnosis and the code&#8217;s billable status. Vague chart entries like &#8220;skin nodules&#8221; or &#8220;rash on legs&#8221; will not support L52 on audit. The <a href=\"https:\/\/www.cms.gov\/medicare\/coding-billing\/icd-10-codes\" target=\"_blank\" rel=\"nofollow noopener\">CMS ICD-10 codes page<\/a> sets the expectation that the medical record supports the coded diagnosis with sufficient clinical detail.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the presentation is atypical, a physician may confirm the diagnosis with a tangential skin biopsy, billed separately using CPT code 11102. Structured digital intake forms that capture morphology, anatomical site, associated symptoms, and prior diagnostic workup give coders the raw material they need to assign L52 confidently. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The checklist below reflects what the medical record must contain before L52 assignment is defensible.<\/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-l52\/customizable-consent-and-intake-forms.webp\" alt=\"Customizable consent and intake forms\"\/><figcaption class=\"wp-element-caption\"><em>Customizable consent and intake forms<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Clinical presentation:<\/strong> Document tender, erythematous nodules with location (anterior shins or other sites) and approximate size<\/li>\n\n\n\n<li><strong>Color and evolution:<\/strong> Note whether lesions are evolving through the characteristic color progression<\/li>\n\n\n\n<li><strong>Absence of ulceration:<\/strong> Explicitly document that nodules are non-ulcerating<\/li>\n\n\n\n<li><strong>Systemic symptoms:<\/strong> Record any associated fever, arthralgias, or malaise<\/li>\n\n\n\n<li><strong>Tuberculosis work-up:<\/strong> Document TB status, PPD\/IGRA result, or clinical reasoning excluding tuberculous etiology<\/li>\n\n\n\n<li><strong>Underlying etiology:<\/strong> Note whether a trigger (sarcoidosis, streptococcal infection, IBD, drug, pregnancy) was identified or ruled out<\/li>\n\n\n\n<li><strong>Treatment plan:<\/strong> Document management approach, including NSAIDs, potassium iodide, compression, rest, or an intralesional corticosteroid injection (billed as CPT code 11901) for persistent nodules<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">ICD-10-CM guidelines require that documentation support the coded diagnosis directly in the medical record, not just inferred from the code itself. <\/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>Flag the TB exclusion at intake. When a patient presents with nodular lower-leg lesions, add a structured field to your clinical note template asking for TB history and screening result. This takes 20 seconds at documentation time and prevents a denial that takes 3 hours to appeal.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-differential-diagnosis-coding\" class=\"wp-block-heading\">Differential diagnosis coding<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Several conditions mimic erythema nodosum clinically, particularly in early presentations before lesions evolve. Coding the differential accurately when the diagnosis is not yet confirmed requires using the &#8220;probable&#8221; or &#8220;suspected&#8221; diagnosis conventions of ICD-10-CM, which differ from inpatient to outpatient settings. For outpatient encounters, code the presenting sign or symptom, not an unconfirmed diagnosis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the diagnosis is confirmed, the table below helps coders distinguish L52 from the most common mimics, each with its own specific code, including <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-l54\/\">L54<\/a>.<\/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\">Differential Diagnosis<\/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\">ICD-10-CM 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\">Key Distinguishing Feature<\/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\">Erythema nodosum<\/td>\n<td style=\"padding:12px 16px;color:#374151\">L52<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Non-ulcerating, self-limiting, anterior shins<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Cellulitis of lower leg<\/td>\n<td style=\"padding:12px 16px;color:#374151\">L03.115 \/ L03.116<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Diffuse, spreading, non-nodular; often unilateral with systemic signs<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Superficial thrombophlebitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">I80.01 \/ I80.02<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Linear, cord-like inflammation along vein; Doppler may confirm<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Sweet syndrome (acute febrile neutrophilic dermatosis)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">L98.2<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Painful plaques or nodules with fever and neutrophilia; skin biopsy confirms<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Other panniculitides (unspecified)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">M79.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use when panniculitis is documented but erythema nodosum not confirmed<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Reactive arthritis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">M02.30<\/td>\n<td style=\"padding:12px 16px;color:#374151\">May present with skin lesions; joint involvement more prominent<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 id=\"h-related-and-adjacent-icd-10-codes\" class=\"wp-block-heading\">Related and adjacent ICD-10 codes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ICD-10 Code L52 sits within block L49-L54 (Urticaria and erythema) in Chapter 12. Understanding the adjacent codes helps coders navigate the block when the presenting diagnosis is uncertain or when multiple skin conditions are documented.<\/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\">Notes<\/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\">L49<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Exfoliation due to erythematous conditions<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Category; subcodes specify body surface area affected<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">L50<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Urticaria<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Includes allergic, idiopathic, and other urticaria types<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">L51<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Erythema multiforme<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Target lesions; distinct from erythema nodosum morphologically<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">L52<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Erythema nodosum<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Billable; subject of this reference<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">L53<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Other erythematous conditions<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Includes erythema annulare centrifugum, toxic erythema<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">L54<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Erythema in diseases classified elsewhere<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Manifestation code; underlying disease coded first<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A18.4<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tuberculosis of skin and subcutaneous tissue<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Includes tuberculosis erythema nodosum; Excludes1 from L52<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">For crosswalk purposes, the <a href=\"https:\/\/www.aapc.com\/codes\/icd-10-codes-range\/\" target=\"_blank\" rel=\"nofollow noopener\">AAPC ICD-10-CM code lookup<\/a> provides adjacent code navigation with notes on related categories within the L49-L54 block.<\/p>\n\n\n\n<h2 id=\"h-drg-and-hospital-billing-considerations\" class=\"wp-block-heading\">DRG and hospital billing considerations<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For inpatient hospital encounters where erythema nodosum is the principal diagnosis or a significant comorbidity, ICD-10 Code L52 maps to Medicare Severity Diagnosis Related Groups (MS-DRGs). The DRG split is a two-tier structure: assignment depends on whether a major complication or comorbidity (MCC) is documented alongside the case.<\/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\">MS-DRG<\/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\">Note<\/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\">606<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Minor skin disorders with MCC<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Higher relative weight; requires a documented major complication or comorbidity<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">607<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Minor skin disorders without MCC<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Lower weight; applies when no qualifying MCC is documented<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">DRG weights and reimbursement rates change annually with CMS updates. The figures above reflect the FY2026 grouper. Verify current weights against CMS&#8217;s published <a href=\"https:\/\/www.cms.gov\/medicare\/payment\/prospective-payment-systems\/acute-inpatient-pps\/fy-2026-ipps-final-rule-home-page\" target=\"_blank\" rel=\"nofollow noopener\">IPPS final rule<\/a>. Practices managing inpatient coding workflows should use claims management software to track DRG assignments and flag when a documented MCC may support the higher-weight DRG.<\/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-l52\/track-claims-from-start-to-finish.webp\" alt=\"Track claims from start to Finish\"\/><figcaption class=\"wp-element-caption\"><em>Track claims from start to Finish<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Related ICD-10 codes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-l814\/\">ICD-10 code L81.4 \u2014 Solar Lentigo<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-l575\/\">ICD-10 code L57.5 \u2014 Actinic granuloma<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-l599\/\">ICD-10 Code L59.9 \u2014 Radiation-related skin disorder, unspecified<\/a><\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-how-pabau-supports-accurate-icd-10-coding-in-dermatology\" class=\"wp-block-heading\">How Pabau supports accurate ICD-10 coding in dermatology<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dermatology and skin practices coding conditions like erythema nodosum need documentation with enough specificity to support the code, captured at the point of care rather than reconstructed from memory during billing. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pabau&#8217;s patient records module supports structured clinical notes with configurable templates, allowing clinicians to document lesion morphology, location, color stage, and differential diagnosis work-up in a consistent format. Combined with before-and-after photo tracking that logs lesion history over time, practices keep what was observed in sync with what gets billed.<\/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-l52\/comprehensive-patient-records.webp\" alt=\"Comprehensive patient records\"\/><figcaption class=\"wp-element-caption\"><em>Comprehensive patient records<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">For practices managing billing across multiple skin conditions, Pabau&#8217;s workflow tools help flag missing documentation before claims are submitted. Book a demo to see how Pabau supports dermatology coding workflows: <a href=\"https:\/\/pabau.com\/book-demo\/\">pabau.com\/book-demo<\/a>.<\/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                    Accurate dermatology coding starts with better documentation                <\/h3>\n\n                <p class=\"description\">\n                    Pabau helps skin and dermatology practices structure clinical notes, capture intake data, and manage claims with HIPAA-compliant records built for ICD-10 workflows.                <\/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 clinical documentation 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\">ICD-10 Code L52 is a specific, billable code with a narrow scope. It covers non-tuberculosis erythema nodosum only. The Excludes1 note is the single highest-risk coding point. Conflating L52 with A18.4 produces a claim error that is both a denial trigger and an audit flag. When the underlying condition is documented, dual-coding is required.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dermatology and skin practices that structure their documentation around the clinical criteria L52 demands will code it cleanly and defend it confidently. Pabau&#8217;s client record and claims management tools make that structure part of the clinical workflow rather than a billing afterthought.<\/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>Need a compliant skin assessment framework?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/skin-assessment-tools\/\" target=\"_blank\" rel=\"noopener\">Skin assessment tools<\/a> provides a structured guide to clinical skin documentation for aesthetic and dermatology practitioners.<\/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>Managing HIPAA compliance across clinical workflows?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/hipaa-compliance-for-medical-offices\/\" target=\"_blank\" rel=\"noopener\">HIPAA compliance guide<\/a> covers the documentation and operational requirements for HIPAA-covered transactions.<\/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>Looking at how dermatology EMR supports coding accuracy?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/aesthetic-emr-software\/\" target=\"_blank\" rel=\"noopener\">Aesthetic EMR software<\/a> explains how purpose-built EMR tools improve coding and documentation workflows for skin practices.<\/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-1784874454743\"><h3 class=\"schema-faq-question\">What is ICD-10 Code L52?<\/h3> <p class=\"schema-faq-answer\">ICD-10 Code L52 is a billable ICD-10-CM diagnosis code for erythema nodosum, a panniculitis presenting as tender, erythematous nodules on the anterior shins. It is valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 under the FY2026 release. The code sits in block L49-L54 (Urticaria and erythema) within Chapter 12 of ICD-10-CM.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784874454744\"><h3 class=\"schema-faq-question\">Is L52 a billable ICD-10-CM code?<\/h3> <p class=\"schema-faq-answer\">Yes, L52 is a billable and specific ICD-10-CM code valid for HIPAA-covered transactions. It is a terminal code with no subcategory, meaning it requires no additional specificity digits. CMS confirms it as valid for submission in the FY2026 Tabular List effective October 1, 2025.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784874454745\"><h3 class=\"schema-faq-question\">What conditions are excluded from ICD-10 Code L52?<\/h3> <p class=\"schema-faq-answer\">Tuberculosis erythema nodosum, coded as A18.4, is excluded from L52 via an Excludes1 note. This means L52 and A18.4 must never be reported together on the same claim. When tuberculosis is the confirmed underlying cause of the skin presentation, use A18.4 exclusively.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784874454746\"><h3 class=\"schema-faq-question\">What is the difference between L52 and A18.4?<\/h3> <p class=\"schema-faq-answer\">L52 covers idiopathic or non-tuberculosis erythema nodosum, while A18.4 covers tuberculosis of the skin and subcutaneous tissue, including tuberculosis-related erythema nodosum. The Excludes1 relationship means they describe mutually exclusive conditions. If TB is documented, A18.4 is correct; if TB is ruled out or not the cause, L52 applies.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784874454747\"><h3 class=\"schema-faq-question\">What is the sarcoidosis ICD-10 code when coding alongside L52?<\/h3> <p class=\"schema-faq-answer\">Sarcoidosis is coded as D86.9 (Sarcoidosis, unspecified) when no specific organ involvement is documented, or with a more specific D86 sub-code when site involvement is confirmed. When sarcoidosis is the documented underlying cause of erythema nodosum, code both D86.9 and L52 per ICD-10-CM dual-coding guidelines for etiology and manifestation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784874454748\"><h3 class=\"schema-faq-question\">Which DRG is associated with ICD-10 Code L52?<\/h3> <p class=\"schema-faq-answer\">L52 maps to MS-DRG 606 (Minor skin disorders with MCC) or 607 (Minor skin disorders without MCC), depending on whether a major complication or comorbidity is documented. DRG weights change annually; always verify against the current CMS IPPS final rule or a live DRG grouper for the applicable fiscal year.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>ICD-10 Code L52 is the billable ICD-10-CM code for erythema nodosum, a panniculitis that presents as tender, erythematous nodules, most often on the anterior shins. It&#8217;s valid for HIPAA-covered transactions under the FY2026 release, effective October 1, 2025 through September 30, 2026. The code carries an Excludes1 note. When tuberculosis is the underlying cause, A18.4 [&hellip;]<\/p>\n","protected":false},"author":81,"featured_media":163314,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"88","_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":[1463,1680,1363],"class_list":["post-163315","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diagnostic-codes","category-icd-10-cm","tag-dermatology","tag-diagnostic-codes","tag-icd-10"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>ICD-10 code L52: Erythema nodosum coding &amp; documentation<\/title>\n<meta name=\"description\" content=\"ICD-10 Code L52 covers erythema nodosum, tender shin nodules, excluding tuberculosis-related cases coded separately as A18.4.\" \/>\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\/nl\/diagnostic-codes\/icd-10-code-l52\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICD-10 code L52: Erythema nodosum coding &amp; documentation\" \/>\n<meta property=\"og:description\" content=\"ICD-10 Code L52 covers erythema nodosum, tender shin nodules, excluding tuberculosis-related cases coded separately as A18.4.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/\" \/>\n<meta property=\"og:site_name\" content=\"Pabau\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Pabau\/\" \/>\n<meta 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is an all-in-one healthcare practice management software platform designed for clinics, medspas, therapists, and medical professionals. 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He specializes in topics around compliance in software solutions. When he's not writing at Pabau, you can find him tending to his bonsai collection or hitting the gym.\",\"url\":\"https:\\\/\\\/pabau.com\\\/nl\\\/blog\\\/author\\\/aleksandar-kochovski\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/nl\\\/diagnostic-codes\\\/icd-10-code-l52\\\/#faq-question-1784874454743\",\"position\":1,\"url\":\"https:\\\/\\\/pabau.com\\\/nl\\\/diagnostic-codes\\\/icd-10-code-l52\\\/#faq-question-1784874454743\",\"name\":\"What is ICD-10 Code L52?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ICD-10 Code L52 is a billable ICD-10-CM diagnosis code for erythema nodosum, a panniculitis presenting as tender, erythematous nodules on the anterior shins. It is valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 under the FY2026 release. The code sits in block L49-L54 (Urticaria and erythema) within Chapter 12 of ICD-10-CM.\",\"inLanguage\":\"nl-NL\"},\"inLanguage\":\"nl-NL\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/nl\\\/diagnostic-codes\\\/icd-10-code-l52\\\/#faq-question-1784874454744\",\"position\":2,\"url\":\"https:\\\/\\\/pabau.com\\\/nl\\\/diagnostic-codes\\\/icd-10-code-l52\\\/#faq-question-1784874454744\",\"name\":\"Is L52 a billable ICD-10-CM code?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, L52 is a billable and specific ICD-10-CM code valid for HIPAA-covered transactions. It is a terminal code with no subcategory, meaning it requires no additional specificity digits. CMS confirms it as valid for submission in the FY2026 Tabular List effective October 1, 2025.\",\"inLanguage\":\"nl-NL\"},\"inLanguage\":\"nl-NL\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/nl\\\/diagnostic-codes\\\/icd-10-code-l52\\\/#faq-question-1784874454745\",\"position\":3,\"url\":\"https:\\\/\\\/pabau.com\\\/nl\\\/diagnostic-codes\\\/icd-10-code-l52\\\/#faq-question-1784874454745\",\"name\":\"What conditions are excluded from ICD-10 Code L52?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Tuberculosis erythema nodosum, coded as A18.4, is excluded from L52 via an Excludes1 note. This means L52 and A18.4 must never be reported together on the same claim. 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He specializes in topics around compliance in software solutions. When he's not writing at Pabau, you can find him tending to his bonsai collection or hitting the gym.","url":"https:\/\/pabau.com\/nl\/blog\/author\/aleksandar-kochovski\/"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454743","position":1,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454743","name":"What is ICD-10 Code L52?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"ICD-10 Code L52 is a billable ICD-10-CM diagnosis code for erythema nodosum, a panniculitis presenting as tender, erythematous nodules on the anterior shins. It is valid for HIPAA-covered transactions from October 1, 2025 through September 30, 2026 under the FY2026 release. The code sits in block L49-L54 (Urticaria and erythema) within Chapter 12 of ICD-10-CM.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454744","position":2,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454744","name":"Is L52 a billable ICD-10-CM code?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, L52 is a billable and specific ICD-10-CM code valid for HIPAA-covered transactions. It is a terminal code with no subcategory, meaning it requires no additional specificity digits. CMS confirms it as valid for submission in the FY2026 Tabular List effective October 1, 2025.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454745","position":3,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454745","name":"What conditions are excluded from ICD-10 Code L52?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Tuberculosis erythema nodosum, coded as A18.4, is excluded from L52 via an Excludes1 note. This means L52 and A18.4 must never be reported together on the same claim. When tuberculosis is the confirmed underlying cause of the skin presentation, use A18.4 exclusively.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454746","position":4,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454746","name":"What is the difference between L52 and A18.4?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"L52 covers idiopathic or non-tuberculosis erythema nodosum, while A18.4 covers tuberculosis of the skin and subcutaneous tissue, including tuberculosis-related erythema nodosum. The Excludes1 relationship means they describe mutually exclusive conditions. If TB is documented, A18.4 is correct; if TB is ruled out or not the cause, L52 applies.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454747","position":5,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454747","name":"What is the sarcoidosis ICD-10 code when coding alongside L52?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Sarcoidosis is coded as D86.9 (Sarcoidosis, unspecified) when no specific organ involvement is documented, or with a more specific D86 sub-code when site involvement is confirmed. When sarcoidosis is the documented underlying cause of erythema nodosum, code both D86.9 and L52 per ICD-10-CM dual-coding guidelines for etiology and manifestation.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454748","position":6,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-l52\/#faq-question-1784874454748","name":"Which DRG is associated with ICD-10 Code L52?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"L52 maps to MS-DRG 606 (Minor skin disorders with MCC) or 607 (Minor skin disorders without MCC), depending on whether a major complication or comorbidity is documented. 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