N64 vs O92
N64 (Other disorders of breast) compared with O92 (Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium), 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. N64 carries an Excludes1 note covering O92: “disorders of breast associated with childbirth (O91-O92)”
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
| N64Other disorders of breast | O92Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Other disorders of breast is a non-billable ICD-10-CM category code (N64). | Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium is a non-billable ICD-10-CM category code (O92). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources