ICD-10 Code B85.0 – Pediculosis due to Pediculus humanus capitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B85.0 – Pediculosis due to Pediculus humanus capitis
What it is
B85.0 identifies head lice infestation caused by Pediculus humanus capitis. Use it when documentation states pediculosis capitis, head lice, or lice infestation of the scalp.
Clinical signs
Typical findings include scalp itching, visible lice or nits attached to hair shafts, and irritation from scratching. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents head lice infestation, whether confirmed by direct visualization or noted by the clinician. It may also apply when the provider documents pediculosis capitis without additional site detail.
Code it for active infestation, not for exposure, screening, or a history of lice. If documentation only says “itching scalp” or “possible lice,” check documentation before assigning B85.0.
Do not use for
Do not use B85.0 for body lice, pubic lice, or unspecified pediculosis. Also avoid it when lice are only suspected or ruled out.
Coding tip
Look for the exact term “head lice” or “pediculosis capitis” in the provider note before coding B85.0.