N03: Chronic nephritic syndrome
Codes under N03 (Chronic nephritic syndrome). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| N03.0 | Chronic nephritic syndrome with minor glomerular abnormality | ✓ |
| N03.0 | Chronic nephritic syndrome with minor glomerular abnormality | ✓ |
| N03.1 | Chronic nephritic syndrome with focal and segmental glomerular lesions | ✓ |
| N03.1 | Chronic nephritic syndrome with focal and segmental glomerular lesions | ✓ |
| N03.2 | Chronic nephritic syndrome with diffuse membranous glomerulonephritis | ✓ |
| N03.2 | Chronic nephritic syndrome with diffuse membranous glomerulonephritis | ✓ |
| N03.3 | Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis | ✓ |
| N03.3 | Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis | ✓ |
| N03.4 | Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis | ✓ |
| N03.4 | Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis | ✓ |
| N03.5 | Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis | ✓ |
| N03.5 | Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis | ✓ |
| N03.6 | Chronic nephritic syndrome with dense deposit disease | ✓ |
| N03.6 | Chronic nephritic syndrome with dense deposit disease | ✓ |
| N03.7 | Chronic nephritic syndrome with diffuse crescentic glomerulonephritis | ✓ |
| N03.7 | Chronic nephritic syndrome with diffuse crescentic glomerulonephritis | ✓ |
| N03.8 | Chronic nephritic syndrome with other morphologic changes | ✓ |
| N03.8 | Chronic nephritic syndrome with other morphologic changes | ✓ |
| N03.9 | Chronic nephritic syndrome with unspecified morphologic changes | ✓ |
| N03.9 | Chronic nephritic syndrome with unspecified morphologic changes | ✓ |
| N03.A | Chronic nephritic syndrome with C3 glomerulonephritis | ✓ |
| N03.A | Chronic nephritic syndrome with C3 glomerulonephritis | ✓ |
Frequently asked questions
What is ICD-10-CM code N03?
N03 is an ICD-10-CM category covering Chronic nephritic syndrome. It contains 22 more specific diagnosis codes, 22 of which are billable.
Is N03 a billable code?
No — N03 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example N03.0 — Chronic nephritic syndrome with minor glomerular abnormality). 22 of the 22 codes under N03 are billable.
What codes fall under N03?
N03 includes N03.0, N03.0, N03.1, N03.1, N03.2, plus 17 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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