N60.1 vs N60.3
N60.1 (Diffuse cystic mastopathy) compared with N60.3 (Fibrosclerosis of breast), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. N60.1 carries an Excludes1 note covering N60.3: “diffuse cystic mastopathy with epithelial proliferation (N60.3-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| N60.1Diffuse cystic mastopathy | N60.3Fibrosclerosis of breast | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Diffuse cystic mastopathy is a non-billable ICD-10-CM category code (N60.1). | Fibrosclerosis of breast is a non-billable ICD-10-CM category code (N60.3). |
| Includes | fibrocystic mastopathy Cystic breast Fibrocystic disease of breast | fibrocystic mastopathy Cystic mastopathy with epithelial proliferation |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources