N06.6 — Isolated proteinuria with dense deposit disease
N06.6 is a billable, specific ICD-10-CM code for isolated proteinuria with dense deposit disease. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Isolated proteinuria with C3 glomerulopathy with dense deposit disease
- Isolated proteinuria with membranoproliferative glomerulonephritis, type 2
Other codes that can never be billed with N06.6
These codes carry an Excludes1 note pointing at N06.6. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N06.6 alone.
- N06.AIsolated proteinuria with C3 glomerulonephritis
Risk adjustment
N06.6 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
N06.6 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A57189Billing and Coding: Serum Magnesium
- A57643Billing and Coding: Lab: Cystatin C Measurement
How N06.6 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to N06.6.
- Proteinuria›isolated›with glomerular lesion›dense deposit disease
- Proteinuria›isolated›with glomerular lesion›C3›glomerulopathy›with dense deposit disease
Related codes at this level
Codes that share N06. If N06.6 is not quite right, the correct code is usually one of these.
- N06.0Isolated proteinuria with minor glomerular abnormality
- N06.1Isolated proteinuria with focal and segmental glomerular lesions
- N06.2Isolated proteinuria with diffuse membranous glomerulonephritis
- N06.3Isolated proteinuria with diffuse mesangial proliferative glomerulonephritis
- N06.4Isolated proteinuria with diffuse endocapillary proliferative glomerulonephritis
- N06.5Isolated proteinuria with diffuse mesangiocapillary glomerulonephritis
- N06.7Isolated proteinuria with diffuse crescentic glomerulonephritis
- N06.8Isolated proteinuria with other morphologic lesion
- N06.9Isolated proteinuria with unspecified morphologic lesion
- N06.AIsolated proteinuria with C3 glomerulonephritis
Questions about N06.6
- Is N06.6 a billable ICD-10-CM code?
- Yes. N06.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N06.6 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Glomerular diseases (N00-N08).