ICD-10 Code L65.2 – Alopecia mucinosa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L65.2 – Alopecia mucinosa
What it is
L65.2 identifies alopecia mucinosa, a condition where hair loss occurs with mucin deposition in the skin or hair follicles. Use it when documentation specifically names this diagnosis.
Clinical signs
Typical findings include patchy hair loss with follicular papules or plaques, often on the scalp. Clinical features vary; refer to documentation for the exact presentation and any biopsy-supported diagnosis.
When to use this code
Use L65.2 when the clinician documents alopecia mucinosa, mucinosis follicularis, or an equivalent diagnosis. It is appropriate when the record links the hair loss to this specific mucinous disorder. If the note only says nonscarring alopecia, check documentation.
Do not use for
Do not use this code for unspecified hair loss, alopecia areata, or other clearly different alopecias. If the chart does not confirm alopecia mucinosa, do not assume it.
Coding tip
Code from the provider’s exact diagnosis wording and confirm the condition is documented as alopecia mucinosa, not just hair loss.