N64.82 vs Q83.0
N64.82 (Hypoplasia of breast) compared with Q83.0 (Congenital absence of breast with absent nipple), 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. N64.82 carries an Excludes1 note covering Q83.0: “congenital absence of breast (Q83.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Yes, when both are documented. Q83.0 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. Q83.0 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 | Q83.0Congenital absence of breast with absent nipple | |
|---|---|---|
| Billing status | Billable | Billable |
| 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 absence of breast with absent nipple is a billable ICD-10-CM diagnosis code (Q83.0). |
| 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