E23.3 vs Q87.11
E23.3 (Hypothalamic dysfunction, not elsewhere classified) compared with Q87.11 (Prader-Willi syndrome), 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. E23.3 carries an Excludes1 note covering Q87.11: “Prader-Willi syndrome (Q87.11)”
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
| E23.3Hypothalamic dysfunction, not elsewhere classified | Q87.11Prader-Willi syndrome | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Hypothalamic dysfunction, not elsewhere classified is a billable ICD-10-CM diagnosis code (E23.3). | Prader-Willi syndrome is a billable ICD-10-CM diagnosis code (Q87.11). |
| Includes | the listed conditions whether the disorder is in the pituitary or the hypothalamus | — |
| Use additional code | — | code(s) to identify all associated manifestations |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources