2026 ICD-10-CM Diagnosis Code N28Other disorders of kidney and ureter, not elsewhere classified

ICD-10-CM Codes›N00–N99›N25-N29›N28

ICD-10-CM N28
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N28 is a non-billable ICD-10-CM category code for other disorders of kidney and ureter, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N28.0, N28.1, N28.81, and N28.82.

Code Identity

ICD-10-CM Code
N28
Billable Status
No — Non-Billable Category
Code Describes
Other disorders of kidney and ureter, not elsewhere classified
Chapter
N25-N29
Other disorders of kidney and ureter

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN25-N29Other disorders of kidney and ureter
CategoryN28Other disorders of kidney and ureter, not elsewhere classified
This CodeN28Other disorders of kidney and ureter, not elsewhere classified

Specific Coding for Oth disorders of kidney and ureter, not elsewhere classifiedOverview

Non-specific codes like N28 require more characters. Use one of these billable codes instead:

  • Use N28.0 for Ischemia and infarction of kidney

  • Use N28.1 for Cyst of kidney, acquired

  • N28.8 for Other specified disorders of kidney and ureter

  • Use N28.81 for Hypertrophy of kidney

  • Use N28.82 for Megaloureter

  • Use N28.83 for Nephroptosis

  • Use N28.84 for Pyelitis cystica

  • Use N28.85 for Pyeloureteritis cystica

  • Use N28.86 for Ureteritis cystica

  • Use N28.89 for Other specified disorders of kidney and ureter

  • Use N28.9 for Disorder of kidney and ureter, 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 N28Overview

Is N28 a billable code?

No. This is a category header that groups the codes for other disorders of kidney and ureter, not elsewhere classified, and headers cannot be submitted on claims. Claims for other disorders of kidney and ureter, not elsewhere classified need a more specific code from this category, such as N28.0, N28.1, and N28.81.