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N03

Non-billable

Chronic nephritic syndrome

N03 is the ICD-10-CM code for Chronic nephritic syndrome. It is a non-billable category code — use a more specific child code such as N03.0 for billing.

Status
Header (non-billable)
Chapter
N00-N99
Subcodes
11
Edition
FY2026

N00-N99 Diseases of the genitourinary system

Includes

  • •chronic glomerular disease
  • •chronic glomerulonephritis
  • •chronic nephritis

Excludes1 — not coded here

  • •chronic tubulo-interstitial nephritis (N11.-)
  • •diffuse sclerosing glomerulonephritis (N05.8-)
  • •nephritic syndrome NOS (N05.-)

Frequently asked questions

What is ICD-10 code N03?
N03 is the ICD-10-CM code for "Chronic nephritic syndrome". It falls under N00-N99 Diseases of the genitourinary system.
Is N03 a billable code?
No — N03 is a non-billable header code. Use a more specific child code (such as N03.0) for billing.
What are the subcodes of N03?
N03 has 11 more specific child codes, including N03.0, N03.1, N03.2.
What is excluded from N03?
Excludes1 (not coded here): chronic tubulo-interstitial nephritis (N11.-); diffuse sclerosing glomerulonephritis (N05.8-); nephritic syndrome NOS (N05.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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