N04.21Billable
Primary membranous nephropathy with nephrotic syndrome
- Chapter
- 14. Diseases of the genitourinary system
- Category
- N04
- Effective date
- October 1, 2026
Related codes in category N04
N04Nephrotic syndromeN04.0Nephrotic syndrome with minor glomerular abnormalityYesN04.1Nephrotic syndrome w focal and segmental glomerular lesionsYesN04.2Nephrotic syndrome w diffuse membranous glomerulonephritisN04.20Nephrotic syndrome with diffuse membranous glomrlneph, unspYesN04.22Secondary membranous nephropathy with nephrotic syndromeYesN04.29Other nephrotic syndrome with diffuse membranous glomrlnephYesN04.3Nephrotic syndrome w diffuse mesangial prolif glomrlnephYesN04.4Nephrotic syndrome w diffuse endocaplry prolif glomrlnephYesN04.5Nephrotic syndrome w diffuse mesangiocapillary glomrlnephYesN04.6Nephrotic syndrome with dense deposit diseaseYesN04.7Nephrotic syndrome w diffuse crescentic glomerulonephritisYes
Frequently asked questions
What is ICD-10 code N04.21?
N04.21 is an ICD-10-CM diagnosis code for Primary membranous nephropathy with nephrotic syndrome.
Is N04.21 a billable code?
Yes. N04.21 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is N04.21 in?
N04.21 falls under Chapter 14: Diseases of the genitourinary system.
When did N04.21 become effective?
N04.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to N04.21?
N04.21 belongs to category N04, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.