ICD-10 Code L87.0 – Keratosis follicularis et parafollicularis in cutem penetrans (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L87.0 – Keratosis follicularis et parafollicularis in cutem penetrans
What it is
This code identifies a rare keratotic skin disorder with follicular and perifollicular plugging that can lead to small, firm papules. Use it when the documentation names this specific diagnosis.
Clinical signs
Typical findings include rough, follicular papules and localized hyperkeratotic lesions. Clinical features vary; refer to documentation, especially when the note describes the classic named condition.
When to use this code
Use L87.0 when the clinician documents keratosis follicularis et parafollicularis in cutem penetrans, or an equivalent explicit diagnosis. It may also fit when the record clearly links the lesion pattern to this rare disorder. If the note only says “keratosis” or “follicular rash,” check documentation before coding.
Do not use for
Do not use this code for nonspecific keratosis, common follicular plugging, or other papular eruptions without a documented match. Check documentation if the diagnosis is uncertain or named differently.
Coding tip
Code from the exact documented diagnosis; this condition is uncommon, so wording in the assessment matters.