E23 vs E89.3
E23 and E89.3 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on E23
postprocedural hypopituitarism (E89.3)
E23
Hypofunction and other disorders of the pituitary gland
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
Use when the record says
- the listed conditions whether the disorder is in the pituitary or the hypothalamus
E89.3
Postprocedural hypopituitarism
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E89
Use when the record says
- Postirradiation hypopituitarism
Indexed under
- Hypopituitarism › postirradiation (juvenile)
- Hypopituitarism › postprocedural (juvenile)
- Absence › pituitary gland › acquired (of) (organ or part) (complete or partial)
- Complication › surgical procedure › hypopituitarism (s) (from) (of)
- Disorder › pituitary gland › iatrogenic (of)
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027