ICD-10 Code L64.9 – Androgenic alopecia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L64.9 – Androgenic alopecia, unspecified
What it is
L64.9 identifies androgenic alopecia when the chart does not specify a subtype. It refers to patterned hair thinning or loss associated with androgen sensitivity, without further detail.
Clinical signs
Typical findings include gradual scalp hair thinning, often with a patterned distribution. Clinical features vary; refer to documentation if the note does not clearly describe the extent or pattern of loss.
When to use this code
Use L64.9 when the provider documents androgenic alopecia but does not specify male pattern, female pattern, or another subtype. It also fits when the record confirms androgenic hair loss and no more precise diagnosis is available. If the documentation is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for nonscarring hair loss from other causes, such as alopecia areata or telogen effluvium. Also avoid it when the provider names a more specific androgenic alopecia code.
Coding tip
Assign the most specific alopecia term documented; use L64.9 only when the record supports androgenic alopecia but lacks further detail.