ICD-10 Code L64.0 – Drug-induced androgenic alopecia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L64.0 – Drug-induced androgenic alopecia
What it is
L64.0 identifies hair loss caused by a medication or other drug exposure. Use it when the record links androgenic-pattern thinning or shedding to a drug effect.
Clinical signs
Clinical features vary; refer to documentation. Typical notes describe diffuse or patterned scalp hair thinning that begins after starting a drug and improves when the drug is stopped.
When to use this code
Use this code when the provider documents drug-induced androgenic alopecia, medication-related hair loss, or hair thinning attributed to a specific agent. It may also fit when alopecia is clearly described as an adverse effect of therapy. Check documentation for the causal drug and the clinician’s wording.
Do not use for
Do not use it for hair loss with no drug cause documented, or for other alopecia types such as scarring alopecia. If the record only says “alopecia” without a medication link, check documentation.
Coding tip
Capture the causative medication in the chart when available, but code L64.0 only if the provider explicitly connects the alopecia to drug exposure.