U.S. ICD-10-CM · FY 2027

N03 ICD-10-CM Code: Chronic nephritic syndrome

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

N03

Chronic nephritic syndrome

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where N03 sits

  1. 1

    Chapter 14

    Diseases of the genitourinary system (N00-N99)

  2. 2

    Section

    Glomerular diseases (N00-N08)

  3. 3

    Category N03

    Chronic nephritic syndrome

  4. 4

    Code N03

    Chronic nephritic syndrome

More specific choices

Codes under N03

N03 is a non-billable category. Choose the child code that best matches the documented diagnosis.

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

N03.A

Chronic nephritic syndrome with C3 glomerulonephritis

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for N03.

Code first

No “code first” instruction is listed for N03.

Use additional code

No “use additional code” instruction is listed for N03.

Excludes1

Conditions that should not be reported together with this code.

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

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for N03.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code N03 mean?

N03 is the FY 2027 U.S. ICD-10-CM code for “Chronic nephritic syndrome.”

Is N03 a billable or specific ICD-10-CM code?

No. N03 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is N03 located in ICD-10-CM?

N03 is listed in Chapter 14, Diseases of the genitourinary system (N00-N99), within Glomerular diseases (N00-N08) (N00–N08), under category N03, Chronic nephritic syndrome.

What coding notes are listed for N03?

No inclusion terms are listed for N03 in this reference record. No code-first instruction is listed. Excludes1 notes: chronic tubulo-interstitial nephritis (N11.-); diffuse sclerosing glomerulonephritis (N05.8-); nephritic syndrome NOS (N05.-). No Excludes2 note is listed.

Ready to transform your clinical documentation?

Join Vero and see how effortless documentation can be.

Try for free

  • No credit card required

  • Cancel anytime