Excludes1 pair
E22- vs E24.1
E22 and E24.1 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 E22
Nelson's syndrome (E24.1)
E22
Hyperfunction of pituitary gland
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
E24.1
Nelson's syndrome
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
Indexed under
- Nelson's syndrome
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