ICD-10 Code B36.2 – White piedra (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B36.2 – White piedra
What it is
White piedra is a superficial fungal infection of the hair shaft. It causes soft, light-colored nodules on affected hairs, most often involving scalp, beard, mustache, or pubic hair.
Clinical signs
Look for small, white to light-brown, loosely attached nodules on hair shafts. Clinical features vary; refer to documentation, but diagnosis is usually based on the characteristic appearance and location.
When to use this code
Use B36.2 when the record documents white piedra or a confirmed superficial infection of hair shafts by this condition. It may also fit when the clinician describes classic nodules on hair consistent with white piedra. Check documentation if the note only says “fungal hair infection” without a specific diagnosis.
Do not use for
Do not use this code for tinea capitis, pediculosis, or other scalp and hair disorders with different causes. If the documentation is nonspecific or uncertain, do not assume white piedra.
Coding tip
Code B36.2 only when the provider names white piedra or clearly documents its classic hair-shaft nodules.