E23 vs E89.3
E23 (Hypofunction and other disorders of the pituitary gland) compared with E89.3 (Postprocedural hypopituitarism), 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 carries an Excludes1 note covering E89.3: “postprocedural hypopituitarism (E89.3)”
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
| E23Hypofunction and other disorders of the pituitary gland | E89.3Postprocedural hypopituitarism | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) |
| Definition | Hypofunction and other disorders of the pituitary gland is a non-billable ICD-10-CM category code (E23). | Postprocedural hypopituitarism is a billable ICD-10-CM diagnosis code (E89.3). |
| Includes | the listed conditions whether the disorder is in the pituitary or the hypothalamus | Postirradiation hypopituitarism |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources