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ICD-10-CM 2027

ICD-10 code for cystic mastopathy

N60.1

Diffuse cystic mastopathy

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Mastopathy, mastopathia › cystic (chronic) (diffuse)”. Page updated September 29, 2026.

About coding cystic mastopathy

The ICD-10-CM code for cystic mastopathy is N60.1 (Diffuse cystic mastopathy). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N60.1.

Within N60 (benign mammary dysplasia), N60.1 is specifically for diffuse cystic mastopathy. Related codes cover Solitary cyst of breast (N60.0), Fibroadenosis of breast (N60.2), fibrosclerosis of breast (N60.3), mammary duct ectasia (N60.4), other benign mammary dysplasias (N60.8) and unspecified benign mammary dysplasia (N60.9).

To report this condition, pick the subcode that matches the documentation: N60.11 (of right breast), N60.12 (of left breast) and N60.19 (of unspecified breast).

Don't report N60.1 together with the conditions in its Excludes1 note: diffuse cystic mastopathy with epithelial proliferation (N60.3-).

More specific cystic mastopathy codes (official index)

  • with epithelial proliferation N60.3 — Fibrosclerosis of breast

Don't confuse with (Excludes1 for N60.1)

  • diffuse cystic mastopathy with epithelial proliferation (N60.3-)

Common questions about cystic mastopathy ICD-10 codes

What is the ICD-10 code for cystic mastopathy?

N60.1 — Diffuse cystic mastopathy (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: N60.3.

Is N60.1 billable?

No. N60.1 is a header code. Report one of its more specific subcodes instead.