ICD-10 Code L40.8 – Other psoriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L40.8 – Other psoriasis
What it is
L40.8 identifies psoriasis that does not fit a more specific ICD-10-CM psoriasis category. Use it for documented psoriasis variants or presentations that are not otherwise classified.
Clinical signs
Psoriasis commonly presents with well-demarcated erythematous plaques and silvery scale, but clinical features vary; refer to documentation. Lesion distribution, nail changes, or atypical patterns may help support the diagnosis.
When to use this code
Use this code when the provider documents psoriasis but specifies an “other” or atypical form not captured by a more specific psoriasis code. It also applies when the record clearly supports psoriasis, yet the subtype is not named. Check documentation if the site or variant is unclear.
Do not use for
Do not use L40.8 when the chart identifies a specific psoriasis type with its own code, such as plaque or guttate psoriasis. Do not assign it for nonspecific rash, dermatitis, or uncertain skin findings.
Coding tip
Code the most specific psoriasis type documented; if the subtype is not stated, L40.8 is usually the fallback.