ICD-10 Code L41 – Parapsoriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L41 – Parapsoriasis
What it is
L41 identifies parapsoriasis, a group of chronic inflammatory skin disorders marked by scaly patches or plaques. Use the code when documentation names parapsoriasis without a more specific subtype.
Clinical signs
Typical findings include persistent, well-demarcated, scaly patches or thin plaques on the trunk or limbs. Clinical features vary; refer to documentation for the exact subtype and distribution.
When to use this code
Use L41 when the provider documents parapsoriasis as the diagnosis, including cases described as chronic scaly dermatitis or patch/plaque disease consistent with that label. Code it only when the record clearly supports parapsoriasis and does not specify a more precise diagnosis.
Do not use for
Do not use L41 for psoriasis, eczema, or nonspecific rash unless the clinician documents parapsoriasis. Check documentation if the note suggests another inflammatory dermatosis.
Coding tip
Look for the exact wording “parapsoriasis” and any subtype detail before assigning L41.