N25.1 — Nephrogenic diabetes insipidus
Is N25.1 billable?
Yes — N25.1 is billable for FY2027. N25.1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. N25.1 may be submitted for encounters from October 1, 2026 through September 30, 2027.
N25.1 at a glance
| Code | N25.1 |
|---|---|
| Description | Nephrogenic diabetes insipidus |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does N25.1 group to?
N25.1 sits in MDC 11 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 698Other Kidney and Urinary Tract Diagnoses with MCCmedical
- 699Other Kidney and Urinary Tract Diagnoses with CCmedical
- 700Other Kidney and Urinary Tract Diagnoses without CC/MCCmedical
As a secondary diagnosis, N25.1 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is N25.1 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to N25.1. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Diabetes, diabetic › insipidus › nephrogenic (mellitus) (sugar)
- Diabetes, diabetic › insipidus › vasopressin resistant (mellitus) (sugar)
Excludes1 — never code together
The conditions below can never be reported together with N25.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- diabetes insipidus NOS (E23.2)
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N25.1, but a patient may have both at the same time. When documentation supports it, N25.1 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from N25-N29
The conditions below are not part of N25.1, but a patient may have both at the same time. When documentation supports it, N25.1 and the excluded code may both be reported.
- disorders of kidney and ureter with urolithiasis (N20-N23)
How long has N25.1 existed?
N25.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with N25.1?
ICD-10-CM declares these codes mutually exclusive with N25.1 — exactly one of each pair can be correct for a given encounter.