E28.3 vs Q99.1
E28.3 (Primary ovarian failure) compared with Q99.1 (46, XX true hermaphrodite), 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. E28.3 carries an Excludes1 note covering Q99.1: “pure gonadal dysgenesis (Q99.1)”
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
| E28.3Primary ovarian failure | Q99.146, XX true hermaphrodite | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Primary ovarian failure is a non-billable ICD-10-CM category code (E28.3). | 46, XX true hermaphrodite is a billable ICD-10-CM diagnosis code (Q99.1). |
| Includes | — | 46, XX with streak gonads 46, XY with streak gonads Pure gonadal dysgenesis |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources