E23.2 vs N25.1
E23.2 (Diabetes insipidus) compared with N25.1 (Nephrogenic diabetes insipidus), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. E23.2 carries an Excludes1 note covering N25.1: “nephrogenic diabetes insipidus (N25.1)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. N25.1 carries an Excludes1 note covering E23.2: “diabetes insipidus NOS (E23.2)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| E23.2Diabetes insipidus | N25.1Nephrogenic diabetes insipidus | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Diabetes insipidus is a billable ICD-10-CM diagnosis code (E23.2). | Nephrogenic diabetes insipidus is a billable ICD-10-CM diagnosis code (N25.1). |
| Includes | the listed conditions whether the disorder is in the pituitary or the hypothalamus | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources