E23.2 vs E87
E23.2 and E87 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 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 (mellitus) (sugar)
- 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