ICD-10-CM Code N03

Chronic nephritic syndrome

Version 2020 Non-Billable Code

Not Valid for Submission

N03 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of chronic nephritic syndrome. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

Short Description:Chronic nephritic syndrome
Long Description:Chronic nephritic syndrome

Consider the following ICD-10 codes with a higher level of specificity:

  • N03.0 - Chronic nephritic syndrome with minor glomerular abnormality
  • N03.1 - Chronic nephritic syndrome with focal and segmental glomerular lesions
  • N03.2 - Chronic nephritic syndrome with diffuse membranous glomerulonephritis
  • N03.3 - Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
  • N03.4 - Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
  • N03.5 - Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
  • N03.6 - Chronic nephritic syndrome with dense deposit disease
  • N03.7 - Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
  • N03.8 - Chronic nephritic syndrome with other morphologic changes
  • N03.9 - Chronic nephritic syndrome with unspecified morphologic changes

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code N03:


This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • chronic glomerular disease
  • chronic glomerulonephritis
  • chronic nephritis

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • chronic tubulo-interstitial nephritis N11
  • diffuse sclerosing glomerulonephritis N05.8
  • nephritic syndrome NOS N05

Code Classification

  • Diseases of the genitourinary system (N00–N99)
    • Glomerular diseases (N00-N08)
      • Chronic nephritic syndrome (N03)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

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. It goes to your bladder, which stores the urine until you go to the bathroom.

Most kidney diseases attack the nephrons. This damage may leave kidneys unable to remove wastes. Causes can include genetic problems, injuries, or medicines. You have a higher risk of kidney disease if you have diabetes, high blood pressure, or a close family member with kidney disease. Chronic kidney disease damages the nephrons slowly over several years. Other kidney problems include

  • Cancer
  • Cysts
  • Stones
  • Infections

Your doctor can do blood and urine tests to check if you have kidney disease. If your kidneys fail, you will need dialysis or a kidney transplant.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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