Erythema nodosum (L52)
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.
Instructional Notations
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
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
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.
