ICD-10 Code B85.1 – Pediculosis due to Pediculus humanus corporis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B85.1 – Pediculosis due to Pediculus humanus corporis
What it is
B85.1 identifies infestation with body lice, Pediculus humanus corporis. Use it when the record documents pediculosis caused by this specific louse species.
Clinical signs
Typical findings include itching, skin irritation, and visible lice or nits on clothing seams or body hair. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider clearly documents body lice infestation or pediculosis corporis. It may also apply when the note specifies Pediculus humanus corporis or equivalent wording.
Code the documented infestation itself, not just exposure or concern. If the species is not stated, check documentation before assigning B85.1.
Do not use for
Do not use this code for head lice or pubic lice infestations. If the chart only says “lice” without species or site, check documentation.
Coding tip
Confirm the louse type and body site in the note before coding, because pediculosis codes differ by organism and location.