ICD-10 Code B88.01 – Infestation by Demodex mites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B88.01 – Infestation by Demodex mites
What it is
B88.01 identifies infestation by Demodex mites, tiny organisms that live in hair follicles and skin glands. Use it when documentation specifies Demodex as the cause of the patient’s condition.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include facial or eyelid irritation, redness, itching, and a sensation of burning or foreign body symptoms when Demodex involvement is described.
When to use this code
Use B88.01 when the provider documents Demodex infestation, Demodex blepharitis, or a similar diagnosis tied to these mites. Code it when the record clearly links the patient’s signs to Demodex rather than to another skin or eye disorder.
If the note only says “itching,” “rash,” or “blepharitis” without naming Demodex, check documentation before assigning this code. You need explicit support for the infestation diagnosis.
Do not use for
Do not use this code for nonspecific dermatitis, blepharitis, or eyelid irritation when Demodex is not documented. Check documentation if the cause is uncertain or another parasite is identified.
Coding tip
Assign B88.01 only when the record names Demodex; otherwise, code the documented symptom or confirmed condition.