2026 ICD-10-CM Diagnosis Code N25Disorders resulting from impaired renal tubular function

ICD-10-CM Codes›N00–N99›N25-N29›N25

ICD-10-CM N25
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N25 is a non-billable ICD-10-CM category code for disorders resulting from impaired renal tubular function, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N25.0, N25.1, N25.81, and N25.89.

Code Identity

ICD-10-CM Code
N25
Billable Status
No — Non-Billable Category
Code Describes
Disorders resulting from impaired renal tubular function
Chapter
N25-N29
Other disorders of kidney and ureter

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN25-N29Other disorders of kidney and ureter
CategoryN25Disorders resulting from impaired renal tubular function
This CodeN25Disorders resulting from impaired renal tubular function

Specific Coding for Disorders resulting from impaired renal tubular functionOverview

Non-specific codes like N25 require more characters. Use one of these billable codes instead:

  • Use N25.0 for Renal osteodystrophy

  • Use N25.1 for Nephrogenic diabetes insipidus

  • N25.8 for Other disorders resulting from impaired renal tubular function

  • Use N25.81 for Secondary hyperparathyroidism of renal origin

  • Use N25.89 for Other disorders resulting from impaired renal tubular function

  • Use N25.9 for Disorder resulting from impaired renal tubular function, unspecified

Patient EducationClinical

Kidney Diseases

You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N25Overview

Is N25 (Disorders resulting from impaired renal tubular function) a billable code?

No. This is a category header that groups the codes for disorders resulting from impaired renal tubular function, and headers cannot be submitted on claims. Claims for disorders resulting from impaired renal tubular function need a more specific code from this category, such as N25.0, N25.1, and N25.81.