ICD-10 Code L41.9 – Parapsoriasis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L41.9 – Parapsoriasis, unspecified
What it is
L41.9 identifies parapsoriasis when the subtype is not specified in the record. It is used for a chronic, scaly skin disorder that resembles psoriasis but is documented more generally.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions include persistent patches or plaques with fine scale, often on the trunk or limbs, but the chart should support the nonspecific diagnosis.
When to use this code
Use L41.9 when the provider documents parapsoriasis without naming a more specific form. It also fits when the note confirms parapsoriasis but does not describe enough detail for a more precise code. Check documentation if the lesion type or subtype is stated elsewhere.
Do not use for
Do not use this code for psoriasis, pityriasis rosea, or other clearly documented papulosquamous disorders. If a specific parapsoriasis subtype is named, code that diagnosis instead.
Coding tip
Code only what the provider documents, and query for the subtype if the record is vague.