N06.21
N06.21: Primary membranous nephropathy with isolated proteinuria
Billable / specific codeICD-10-CM
N06.21 is a billable, specific ICD-10-CM code for primary membranous nephropathy with isolated proteinuria. It is valid for submission on a claim.
Check N06.21 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- primary membranous nephropathy with nephrotic syndrome (N04.21)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Idiopathic membranous nephropathy (with isolated proteinuria)
- Primary membranous nephropathy, NOS
Other codes that can never be billed with N06.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
- R80.0Isolated proteinuria
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
N06.21 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›primary
Code history
Unchanged in every release from FY2024 to FY2027.