N04.21: Primary membranous nephropathy with nephrotic syndrome
N04.21 is the billable ICD-10-CM diagnosis code for Primary membranous nephropathy with nephrotic syndrome. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code N04.21?
N04.21 is the ICD-10-CM diagnosis code for Primary membranous nephropathy with nephrotic syndrome. It belongs to category N04 (Nephrotic syndrome).
Is N04.21 a billable code?
Yes. N04.21 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does N04.21 belong to?
N04.21 is part of ICD-10-CM category N04 — Nephrotic syndrome, which has 32 billable codes.
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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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