N61.20 (Granulomatous mastitis, unspecified breast) compared with N61.23 (Granulomatous mastitis, bilateral breast), from the official CMS tabular data. N61.20 and N61.23 code the same condition on opposite sides. MedCoder-derived
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. N61.20 and N61.23 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| N61.20Granulomatous mastitis, unspecified breast | N61.23Granulomatous mastitis, bilateral breast | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | N00-N99 — Diseases of the genitourinary system | N00-N99 — Diseases of the genitourinary system |
| Definition | Granulomatous mastitis, unspecified breast is a billable ICD-10-CM diagnosis code (N61.20). | Granulomatous mastitis, bilateral breast is a billable ICD-10-CM diagnosis code (N61.23). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources