N00.4 — Acute nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
N00.4 is a billable, specific ICD-10-CM code for acute nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis. It is valid for submission on a claim.
Excludes1 inherited from the categories above N00.4
These are not written on N00.4, but they bind it: a note on a category applies to every code beneath it. Billing N00.4 with anything listed here is a denial.
Risk adjustment
N00.4 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
N00.4 is named in 2 Medicare coverage policies — 2 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
How N00.4 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 N00.4.
- Nephritis, nephritic›acute›with›diffuse›endocapillary proliferative glomerulonephritis
Code history
N00.4 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 N00. If N00.4 is not quite right, the correct code is usually one of these.
- N00.0Acute nephritic syndrome with minor glomerular abnormality
- N00.1Acute nephritic syndrome with focal and segmental glomerular lesions
- N00.2Acute nephritic syndrome with diffuse membranous glomerulonephritis
- N00.3Acute nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
- N00.5Acute nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- N00.6Acute nephritic syndrome with dense deposit disease
- N00.7Acute nephritic syndrome with diffuse crescentic glomerulonephritis
- N00.8Acute nephritic syndrome with other morphologic changes
- N00.9Acute nephritic syndrome with unspecified morphologic changes
- N00.AAcute nephritic syndrome with C3 glomerulonephritis
- N00.BAcute nephritic syndrome with immune complex membranoproliferative glomerulonephritis
Questions about N00.4
- Is N00.4 a billable ICD-10-CM code?
- Yes. N00.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N00.4 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 N00.4?
- N00.4 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 N00.4 (N00) and apply to it just the same.