G89 vs N64.4
G89 (Pain, not elsewhere classified) compared with N64.4 (Mastodynia), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. G89 carries an Excludes2 note covering N64.4: “breast pain (N64.4)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| G89Pain, not elsewhere classified | N64.4Mastodynia | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Pain, not elsewhere classified is a non-billable ICD-10-CM category code (G89). | Mastodynia is a billable ICD-10-CM diagnosis code (N64.4). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources