Excludes1 pair
E23.2 vs E87-
E23.2 and E87 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 E87
diabetes insipidus (E23.2)
E23.2
Diabetes insipidus
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
Indexed under
- Deficiency, deficient › antidiuretic hormone
- Deficiency, deficient › vasopressin
- Diabetes, diabetic › insipidus
- Hyposecretion › antidiuretic hormone
- Hyposecretion › vasopressin
E87
Other disorders of fluid, electrolyte and acid-base balance
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E70-E88
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