N04: Nephrotic syndrome

Codes under N04 (Nephrotic syndrome). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
N04.0	Nephrotic syndrome with minor glomerular abnormality	✓
N04.1	Nephrotic syndrome with focal and segmental glomerular lesions	✓
N04.2	Nephrotic syndrome with diffuse membranous glomerulonephritis	—
N04.3	Nephrotic syndrome with diffuse mesangial proliferative glomerulonephritis	✓
N04.4	Nephrotic syndrome with diffuse endocapillary proliferative glomerulonephritis	✓
N04.5	Nephrotic syndrome with diffuse mesangiocapillary glomerulonephritis	✓
N04.6	Nephrotic syndrome with dense deposit disease	✓
N04.7	Nephrotic syndrome with diffuse crescentic glomerulonephritis	✓
N04.8	Nephrotic syndrome with other morphologic changes	✓
N04.9	Nephrotic syndrome with unspecified morphologic changes	✓
N04.20	Nephrotic syndrome with diffuse membranous glomerulonephritis, unspecified	✓
N04.21	Primary membranous nephropathy with nephrotic syndrome	✓
N04.22	Secondary membranous nephropathy with nephrotic syndrome	✓
N04.29	Other nephrotic syndrome with diffuse membranous glomerulonephritis	✓
N04.A	Nephrotic syndrome with C3 glomerulonephritis	✓
N04.B	Nephrotic syndrome with immune complex membranoproliferative glomerulonephritis (IC-MPGN)	—
N04.B1	Nephrotic syndrome with idiopathic immune complex membranoproliferative glomerulonephritis (IC-MPGN)	✓
N04.B2	Nephrotic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)	✓

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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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