2026 ICD-10-CM Diagnosis Code N05Unspecified nephritic syndrome

ICD-10-CM Codes›N00–N99›N00-N08›N05

ICD-10-CM N05
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N05 is a non-billable ICD-10-CM category code for unspecified nephritic syndrome, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N05.0, N05.1, N05.2, and N05.3.

Code Identity

ICD-10-CM Code
N05
Billable Status
No — Non-Billable Category
Code Describes
Unspecified nephritic syndrome
Chapter
N00-N08
Glomerular diseases

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN00-N08Glomerular diseases
CategoryN05Unspecified nephritic syndrome
This CodeN05Unspecified nephritic syndrome

Specific Coding for Unspecified nephritic syndromeOverview

Non-specific codes like N05 require more characters. Use one of these billable codes instead:

  • Use N05.0 for Unspecified nephritic syndrome with minor glomerular abnormality

  • Use N05.1 for Unspecified nephritic syndrome with focal and segmental glomerular lesions

  • Use N05.2 for Unspecified nephritic syndrome with diffuse membranous glomerulonephritis

  • Use N05.3 for Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritis

  • Use N05.4 for Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis

  • Use N05.5 for Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis

  • Use N05.6 for Unspecified nephritic syndrome with dense deposit disease

  • Use N05.7 for Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis

  • Use N05.8 for Unspecified nephritic syndrome with other morphologic changes

  • Use N05.9 for Unspecified nephritic syndrome with unspecified morphologic changes

  • Use N05.A for Unspecified nephritic syndrome with C3 glomerulonephritis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • glomerular disease NOS
  • glomerulonephritis NOS
  • nephritis NOS
  • nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8

Type 1 Excludes

  • nephropathy NOS with no stated morphological lesion N28.9
  • renal disease NOS with no stated morphological lesion N28.9
  • tubulo-interstitial nephritis NOS N12

Clinical InformationClinical

  • Nephritic Syndrome

    a syndrome characterized by hematuria with dysmorphic red blood cells, red blood cell casts, and proteinuria; systemic manifestations may be present, including hypertension, edema, oliguria.

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 N05Overview

Is N05 (Unspecified nephritic syndrome) a billable code?

No. This is a category header that groups the codes for unspecified nephritic syndrome, and headers cannot be submitted on claims. Claims for unspecified nephritic syndrome need a more specific code from this category, such as N05.0, N05.1, and N05.2.