N00 — Acute nephritic syndrome
Is N00 billable?
No — N00 is a non-billable header code. N00 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 13 billable codes beneath N00.
Billable codes under this header
- 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
- N00.4Acute nephritic syndrome with diffuse endocapillary 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.B1Acute nephritic syndrome with idiopathic immune membranoproliferative glomerulonephritis (IC-MPGN)
- N00.B2Acute nephritic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)
N00 at a glance
| Code | N00 |
|---|---|
| Description | Acute nephritic syndrome |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with N00 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Includes
Conditions classified to N00.
- acute glomerular disease
- acute glomerulonephritis
- acute nephritis
Excludes1 — never code together — inherited from N00-N08
The conditions below can never be reported together with N00 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- hypertensive chronic kidney disease (I12.-)
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N00, but a patient may have both at the same time. When documentation supports it, N00 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Code also — inherited from N00-N08
Two codes may be needed to describe the condition fully. Whether N00 is sequenced first depends on the reason for the encounter.
- any associated kidney failure (N17-N19).
What codes fall under N00? (12)
- 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
- N00.4Acute nephritic syndrome with diffuse endocapillary 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 glomerulonephritisnot billable
How long has N00 existed?
N00 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with N00?
ICD-10-CM declares these codes mutually exclusive with N00 — exactly one of each pair can be correct for a given encounter.