ICD-10-CM 2027
ICD-10 code for mammary dysplasia
From the official ICD-10-CM alphabetic index entry “Dysplasia › mammary (gland) (benign)”. Page updated September 29, 2026.
About coding mammary dysplasia
The ICD-10-CM code for mammary dysplasia is N60.9 (Unspecified benign mammary dysplasia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N60.9.
Within N60, choose N60.9 (Unspecified benign mammary dysplasia) only when documentation doesn't support a more specific option: Solitary cyst of breast (N60.0), diffuse cystic mastopathy (N60.1), Fibroadenosis of breast (N60.2), fibrosclerosis of breast (N60.3), mammary duct ectasia (N60.4) and other benign mammary dysplasias (N60.8).
To report this condition, pick the subcode that matches the documentation: N60.91 (of right breast), N60.92 (of left breast) and N60.99 (of unspecified breast).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific mammary dysplasia codes (official index)
- cyst (solitary)
- cystic
- duct ectasia
- fibroadenosis
- fibrosclerosis
- specified type NEC N60.8 — Other benign mammary dysplasias
Common questions about mammary dysplasia ICD-10 codes
What is the ICD-10 code for mammary dysplasia?
- N60.9 — Unspecified benign mammary dysplasia (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: N60.8.
Is N60.9 billable?
- No. N60.9 is a header code. Report one of its more specific subcodes instead.