Try for free

N03 ICD-10-CA category: Chronic nephritic syndrome

N03 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.

Official description

N03

Chronic nephritic syndrome

ICD-10-CA · Canada

Codes in N03

N03 isn’t a code on its own. Open the code that matches what the note documents.

N03.0Chronic nephritic syndrome, minor glomerular abnormalityN03.1Chronic nephritic syndrome, focal and segmental glomerular lesionsN03.2Chronic nephritic syndrome, diffuse membranous glomerulonephritisN03.3Chronic nephritic syndrome, diffuse mesangial proliferative glomerulonephritisN03.4Chronic nephritic syndrome, diffuse endocapillary proliferative glomerulonephritisN03.5Chronic nephritic syndrome, diffuse mesangiocapillary glomerulonephritisN03.6Chronic nephritic syndrome, dense deposit diseaseN03.7Chronic nephritic syndrome, diffuse crescentic glomerulonephritisN03.8Chronic nephritic syndrome, otherN03.9Chronic nephritic syndrome, unspecified

Notes for N03

As CIHI prints them, with any note N03 takes from the headings above it.

Includes

  • Chronic:• glomerular disease• glomerulonephritis• nephritis

Use additional code

Add a code for this detail when the note documents it.

Excludes

Conditions classified elsewhere.

  • Chronic tubulo-interstitial nephritis (N11.-)diffuse sclerosing glomerulonephritis (N18.9)nephritic syndrome NOS (N05.-)
  • Hypertensive renal disease (I12)From N00-N08 Glomerular diseases
  • Certain conditions originating in the perinatal period (P00-P96)certain infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 14: Diseases of the genitourinary system (N00-N99)

Note

  • See note under chapter heading (N00-N08) for fourth character subdivisions
  • The following fourth-character subdivisions classify morphological changes and are for use with categories N00 - N07. Subdivisions .0 - .8 should not normally be used unless these have been specifically identified (e.g. by renal biopsy or autopsy). The three-character categories relate to clinical syndromes..0 Minor glomerular abnormalityMinimal change lesion.1 Focal and segmental glomerular lesionsGlomerulonephritis, Hyalinosis, Sclerosis — focal and segmental.2 Diffuse membranous glomerulonephritis.3 Diffuse mesangial proliferative glomerulonephritis.4 Diffuse endocapillary proliferative glomerulonephritis.5 Diffuse mesangiocapillary glomerulonephritisMembranoproliferative glomerulonephritis, types 1 and 3, or NOS.6 Dense deposit diseaseMembranoproliferative glomerulonephritis, type 2.7 Diffuse crescentic glomerulonephritisExtracapillary glomerulonephritis.8 OtherProliferative glomerulonephritis NOS.9 UnspecifiedFrom N00-N08 Glomerular diseases

Where N03 sits

  1. 1ChapterChapter 14: Diseases of the genitourinary system (N00-N99)
  2. 2Block N00-N08Glomerular diseases
  3. 3Category N03Chronic nephritic syndrome

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See N03 in the CIHI source

Frequently asked questions

Is N03 a valid ICD-10-CA code?

No. N03 (Chronic nephritic syndrome) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 10 codes; record the one the documentation supports.

Where is N03 in ICD-10-CA?

N03 sits under N00-N08 Glomerular diseases, within Chapter 14: Diseases of the genitourinary system (N00-N99).

What coding notes apply to N03?

ICD-10-CA lists Note, Includes, Excludes, Use additional code notes for N03, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside N03

N00Acute nephritic syndromeN01Rapidly progressive nephritic syndromeN02Recurrent and persistent haematuriaN04Nephrotic syndromeN05Unspecified nephritic syndromeN06Isolated proteinuria with specified morphological lesionN07Hereditary nephropathy, not elsewhere classifiedN08Glomerular disorders in diseases classified elsewhere