Other disorders of kidney and ureter (N25-N29) ICD-10-CM
The N25–N29 section covers other disorders of kidney and ureter with 28 ICD-10-CM diagnosis codes, of which 22 are billable in fiscal year 2026. The section is organized into the 5 code ranges listed below.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Code Ranges in This Section 5 ranges · 28 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the N25–N29 Code Range
ICD-10 codes N25 through N29 cover a variety of other kidney and ureter disorders that include problems with the kidney’s tubular function, kidney size and structure abnormalities, ischemic injuries, cyst development, and kidney complications linked to systemic diseases. These codes help detail conditions beyond common kidney diseases and are essential for capturing less typical kidney and ureter disorders.
The N25 codes focus on impaired renal tubular function, including conditions like renal osteodystrophy (N25.0), also known by synonyms such as hyperparathyroidism due to renal insufficiency and chronic kidney disease mineral and bone disorder. They also include nephrogenic diabetes insipidus (N25.1) or vasopressin resistance, where kidneys cannot concentrate urine properly. Codes like N26 and N27 describe abnormalities in kidney size, such as atrophy (N26.1) or small kidney (N27.0-N27.9). The N28 section addresses a range of specified kidney and ureter disorders, including ischemia and infarction of the kidney (N28.0), acquired kidney cysts, and conditions like megaloureter (N28.82) and pyeloureteritis cystica (N28.85). Lastly, N29 covers kidney and ureter diseases arising in systemic conditions like renal disorder due to systemic lupus erythematosus or nephrocalcinosis. These codes assist coders and clinicians in accurately identifying rare or complex renal disorders for proper diagnosis and treatment planning.
Questions About This Page
How many codes are in the N25-N29 range?
The N25-N29 range contains 28 ICD-10-CM diagnosis codes in FY 2026. 22 of them are billable, and the rest are category headers that organize the section.
What conditions does N25-N29 cover?
The range covers other disorders of kidney and ureter. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
