N04.21
N04.21: Primary membranous nephropathy with nephrotic syndrome
Billable / specific codeICD-10-CM
N04.21 is a billable, specific ICD-10-CM code for primary membranous nephropathy with nephrotic syndrome. It is valid for submission on a claim.
Check N04.21 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Idiopathic membranous nephropathy with nephrotic syndrome
Other codes that can never be billed with N04.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
N04.21 is named in 3 Medicare coverage policies: 3 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A57189Billing and Coding: Serum Magnesium
- A59186Billing and Coding: Magnesium
Alphabetic index entries that lead here
- Nephropathy›membranous›idiopathic, with nephrotic syndrome
- Nephropathy›membranous›primary›with nephrotic syndrome
- Nephropathy›membranous›with›nephrotic syndrome›primary
Code history
Unchanged in every release from FY2024 to FY2027.