ICD-10 Code L41.5 – Retiform parapsoriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L41.5 – Retiform parapsoriasis
What it is
L41.5 identifies retiform parapsoriasis, a rare chronic skin disorder in the parapsoriasis group. It is used when the clinician documents this specific diagnosis, not a broader or uncertain rash.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions include persistent scaly patches or plaques with a retiform, net-like pattern, usually on the trunk or extremities.
When to use this code
Use L41.5 when the provider clearly diagnoses retiform parapsoriasis in the record. Apply it for outpatient, inpatient, or specialty dermatology documentation that names this condition. If the note only says “parapsoriasis” or describes an undifferentiated rash, check documentation before coding.
Do not use for
Do not use this code for nonspecific dermatitis, eczema, psoriasis, or other parapsoriasis types that are separately documented. If the diagnosis is uncertain, check documentation rather than assuming L41.5.
Coding tip
Code the most specific documented parapsoriasis term; if “retiform” is not stated, do not default to L41.5.