Erythema nodosum (L52) ICD-10-CM
The L52 code range covers erythema nodosum with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- tuberculous erythema nodosum A18.4
Codes in the L52 Range 1 codes · 1 billable
- L52 Erythema nodosum
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L52 range.
Erythema Induratum
A type of panniculitis characterized histologically by the presence of granulomas, vasculitis, and necrosis. It is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. It is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. The nodules may progress to form indurations, ulcerations, and scars.
Erythema Nodosum
An erythematous eruption commonly associated with drug reactions or infection and characterized by inflammatory nodules that are usually tender, multiple, and bilateral. These nodules are located predominantly on the shins with less common occurrence on the thighs and forearms. They undergo characteristic color changes ending in temporary bruise-like areas. This condition usually subsides in 3-6 weeks without scarring or atrophy.
About the L52 Code Range
ICD-10 code L52 is specifically used to identify erythema nodosum, a type of inflammatory condition affecting the skin. This code covers cases of erythema nodosum arising from various causes, including infections, medication reactions, and systemic diseases.
Erythema nodosum, also known by synonyms such as lobular panniculitis, erythema induratum, or acute panniculitis, manifests as tender red nodules usually located on the shins. The ICD-10 code L52 helps medical coders document this condition whether it is triggered by streptococcal infections, other bacterial infections like Yersinia enterocolitica, fungal infections such as coccidioidomycosis, sarcoidosis, or drug-induced causes. Using this code ensures precise classification of erythema nodosum or its variants, including chronic or migratory forms, which facilitates accurate diagnosis, treatment tracking, and insurance claims. For healthcare professionals and coders searching for the "ICD-10 code for erythema nodosum," L52 is the correct choice to capture this distinctive inflammatory skin condition clearly.
Questions About This Page
How many billable codes are in the L52 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the L52 range classify?
The range classifies erythema nodosum. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
