ICD-10 Code L41.3 – Small plaque parapsoriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L41.3 – Small plaque parapsoriasis
What it is
Small plaque parapsoriasis is a chronic, usually mild inflammatory skin disorder with small, scaly patches. It is coded when documentation specifically identifies this diagnosis.
Clinical signs
Typical findings include small, round or oval, thin plaques with fine scale, often on the trunk or proximal limbs. Clinical features vary; refer to documentation.
When to use this code
Use L41.3 when the provider documents small plaque parapsoriasis as the confirmed diagnosis. Apply it for outpatient or inpatient records describing this specific parapsoriasis subtype, not a general rash or unspecified dermatitis.
If the note mentions parapsoriasis without subtype, check documentation before assigning this code. Code only when the record clearly supports the small plaque form.
Do not use for
Do not use L41.3 for psoriasis, eczema, pityriasis rosea, or nonspecific scaly eruptions. If the diagnosis is uncertain, check documentation.
Coding tip
Match the exact provider wording; if “small plaque parapsoriasis” is not stated, query or code the documented condition instead.