Excludes1 pair
E23- vs E89.3
E23 and E89.3 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
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
- Hypopituitarism › postprocedural
- Absence › pituitary gland › acquired
- Complication › surgical procedure › hypopituitarism (posthypophysectomy)
- Disorder › pituitary gland › iatrogenic (postprocedural)
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