N03.6 — Chronic nephritic syndrome with dense deposit disease
N03.6 is a billable, specific ICD-10-CM code for chronic nephritic syndrome 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.
- Chronic nephritic syndrome with C3 glomerulopathy with dense deposit disease
- Chronic nephritic syndrome with membranoproliferative glomerulonephritis, type 2
Excludes1 inherited from the categories above N03.6
These are not written on N03.6, but they bind it: a note on a category applies to every code beneath it. Billing N03.6 with anything listed here is a denial.
Other codes that can never be billed with N03.6
These codes carry an Excludes1 note pointing at N03.6. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N03.6 alone.
- N03.AChronic nephritic syndrome with C3 glomerulonephritis
Risk adjustment
N03.6 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
N03.6 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54548Billing and Coding: Eculizumab, and Biosimilars: EPYSQLI®-eculizumab-aagh, and BKEMV™-eculizumab-aeeb
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56380Billing and Coding: Rituximab
- A57189Billing and Coding: Serum Magnesium
How N03.6 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 N03.6.
- Nephritis, nephritic›chronic›with›dense deposit disease
- Nephritis, nephritic›chronic›with›C3›glomerulopathy›with dense deposit disease
Code history
N03.6 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share N03. If N03.6 is not quite right, the correct code is usually one of these.
- N03.0Chronic nephritic syndrome with minor glomerular abnormality
- N03.1Chronic nephritic syndrome with focal and segmental glomerular lesions
- N03.2Chronic nephritic syndrome with diffuse membranous glomerulonephritis
- N03.3Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
- N03.4Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
- N03.5Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- N03.7Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
- N03.8Chronic nephritic syndrome with other morphologic changes
- N03.9Chronic nephritic syndrome with unspecified morphologic changes
- N03.AChronic nephritic syndrome with C3 glomerulonephritis
Questions about N03.6
- Is N03.6 a billable ICD-10-CM code?
- Yes. N03.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N03.6 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Glomerular diseases (N00-N08).
- What cannot be coded together with N03.6?
- N03.6 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above N03.6 (N03) and apply to it just the same.