ICD10Check
CheckerBrowseOpen

N03.5

✓ Billable

Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis

Diseases of the genitourinary system (N00-N99)

Check This Code

Also Known As

Chronic nephritic syndrome with membranoproliferative glomerulonephritis, types 1 and 3, or NOS

❌ Excludes1

direct

These codes are mutually exclusive. Never code them together.

  • • Chronic nephritic syndrome with C3 glomerulonephritis (N03.A)
  • • Chronic nephritic syndrome with C3 glomerulopathy (N03.A)

❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

N03
  • • chronic tubulo-interstitial nephritis (N11.-)
  • • diffuse sclerosing glomerulonephritis (N05.8-)
  • • nephritic syndrome NOS (N05.-)

Clinical Description

ICD-10-CM code N03.5 represents chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis. This code falls under the Diseases of the genitourinary system (N00-N99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that N03.5 has 5 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code N03.5?

ICD-10-CM code N03.5 is "Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis". It belongs to the category: Diseases of the genitourinary system (N00-N99).

Is N03.5 a billable ICD-10 code?

Yes, N03.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with N03.5?

N03.5 has 5 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Related Codes in N03

Other codes in the same category that may be relevant for differential coding:

N03.0Chronic nephritic syndrome with minor glomerular abnormalityN03.1Chronic nephritic syndrome with focal and segmental glomerular lesionsN03.2Chronic nephritic syndrome with diffuse membranous glomerulonephritisN03.3Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritisN03.4Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisN03.6Chronic nephritic syndrome with dense deposit diseaseN03.7Chronic nephritic syndrome with diffuse crescentic glomerulonephritisN03.8Chronic nephritic syndrome with other morphologic changesN03.9Chronic nephritic syndrome with unspecified morphologic changesN03.AChronic nephritic syndrome with C3 glomerulonephritis

🧪 Validate Combinations

Add N03.5 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeN03.5
BillableYes
ParentN03
CategoryDiseases of the genitourinary system (N00-N99)
Excludes15 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)