ICD-10 Code L63.2 – Ophiasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L63.2 – Ophiasis
What it is
Ophiasis is a pattern of alopecia areata that causes hair loss along the scalp margins, usually around the back and sides. It is a non-scarring form of patchy hair loss.
Clinical signs
You may see a band-like or serpentine area of hair loss along the occipital and temporal scalp. The scalp skin is typically smooth, and clinical features vary; refer to documentation.
When to use this code
Use L63.2 when the record specifically identifies ophiasis or ophiasis-pattern alopecia areata. This code fits documented scalp-margin hair loss due to alopecia areata, not general thinning or unspecified alopecia. Check documentation if the pattern is not clearly stated.
Do not use for
Do not use this code for scarring alopecia, traction alopecia, or hair loss from another stated cause. If the note only says “alopecia” without the ophiasis pattern, choose a more specific documented code or check documentation.
Coding tip
Code L63.2 only when the clinician documents the ophiasis pattern; otherwise, the record may support a different alopecia areata code.