New code ยท FY2026
Not billable: this is a header. Use one of the more specific codes below.
- New code, effective October 1, 2025 (FY2026).
Code breakdown
N00.B
- N00CategoryAcute nephritic syndrome
- BCharacter 4Acute nephritic syndrome with immune complex membranoproliferative glomerulonephritis
Coding notes
Includes (from N00)
- acute glomerular disease
- acute glomerulonephritis
- acute nephritis
Excludes1 (from N00)
- acute tubulo-interstitial nephritis (N10)
- nephritic syndrome NOS (N05.-)
Codes under N00.B
- N00.B1 Acute nephritic syndrome with idiopathic immune membranoproliferative glomerulonephritis (IC-MPGN)
- N00.B2 Acute nephritic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)
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ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.