ICD-10-CM 2027
ICD-10 code for hair loss
Confirmed by the official ICD-10-CM index entry “alopecia (hereditaria) (seborrheica)”. Page updated September 29, 2026.
About coding hair loss
The ICD-10-CM code for hair loss is L65.9 (Nonscarring hair loss, unspecified). The official index lists 12 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L65.9.
It is also searched as alopecia.
Within L65, choose L65.9 (Nonscarring hair loss, unspecified) only when documentation doesn't support a more specific option: Telogen effluvium (L65.0), Anagen effluvium (L65.1), alopecia mucinosa (L65.2) and other specified nonscarring hair loss (L65.8).
Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Related Hair loss codes
- L63.0 Alopecia (capitis) totalis
- L63.1 Alopecia universalis
- L63.2 Ophiasis
- L63.8 Other alopecia areata
- L63.9 Alopecia areata, unspecified
- L64.0 Drug-induced androgenic alopecia
- L64.8 Other androgenic alopecia
- L64.9 Androgenic alopecia, unspecified
- L65.0 Telogen effluvium
- L65.1 Anagen effluvium
- L65.2 Alopecia mucinosa
- L65.8 Other specified nonscarring hair loss
Common questions about hair loss ICD-10 codes
What is the ICD-10 code for hair loss?
- L65.9 — Nonscarring hair loss, unspecified. More specific codes apply when the documentation supports them: L63.0, L63.1, L63.2, L63.8 and others below.
What is the ICD-10 code for alopecia (capitis) totalis?
- L63.0 — Alopecia (capitis) totalis.
What is the ICD-10 code for alopecia universalis?
- L63.1 — Alopecia universalis.
What is the ICD-10 code for ophiasis?
- L63.2 — Ophiasis.
What is the ICD-10 code for other alopecia areata?
- L63.8 — Other alopecia areata.
What is the ICD-10 code for alopecia areata, unspecified?
- L63.9 — Alopecia areata, unspecified.
What is the ICD-10 code for drug-induced androgenic alopecia?
- L64.0 — Drug-induced androgenic alopecia.
Is L65.9 billable?
- Yes. L65.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L65.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L65.9 as a principal diagnosis.
Is L65.9 a CC or MCC?
- No. L65.9 is neither a CC nor an MCC under MS-DRG v44.0.