ICD-10 Code L64 – Androgenic alopecia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L64 – Androgenic alopecia
What it is
Androgenic alopecia is a common pattern of hair loss related to androgen sensitivity. It typically causes gradual thinning of scalp hair in a characteristic distribution.
Clinical signs
Clinical features vary; refer to documentation. Common findings include progressive hair thinning, widening part lines, or recession of the frontal hairline, with preservation of scalp skin.
When to use this code
Use L64 when the record documents androgenic alopecia, male-pattern baldness, or female-pattern hair loss. Code it when the clinician identifies this specific non-scarring hair loss pattern. If the note only says “hair loss,” check documentation for the cause.
Do not use for
Do not use this code for scarring alopecia, alopecia areata, or hair loss from chemotherapy or other clearly documented causes. Check documentation when the type of alopecia is not specified.
Coding tip
Look for the exact pattern and cause in the assessment, because “alopecia” alone is not enough to assign L64.