N04.B2: Nephrotic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)

New code · FY2026

Billable: use this code on claims.

• New code, effective October 1, 2025 (FY2026).

Code breakdown

Coding notes

Includes (from N04)

• congenital nephrotic syndrome
• lipoid nephrosis

Medicare coverage

N04.B2 is listed as a covered diagnosis in 2 Medicare billing and coding articles:

• A54548 Billing and Coding: Eculizumab, and Biosimilars: EPYSQLI®-eculizumab-aagh, and BKEMV™-eculizumab-aeeb
• A59186 Billing and Coding: Magnesium

Check this code

• Code search: full entry and nearby codes
• Excludes checker: can it be billed with another code?
• Coverage checker: is it covered for your CPT code?

All FY2026 ICD-10-CM changes

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.