N64.82 vs Q83
N64.82 (Hypoplasia of breast) compared with Q83 (Congenital malformations of breast), 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. Q83 carries an Excludes2 note covering N64.82: “hypoplasia of breast (N64.82)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. Q83 carries an Excludes2 note covering N64.82: “micromastia (N64.82)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| N64.82Hypoplasia of breast | Q83Congenital malformations of breast | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Hypoplasia of breast is a billable ICD-10-CM diagnosis code (N64.82). | Congenital malformations of breast is a non-billable ICD-10-CM category code (Q83). |
| Includes | Micromastia | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources