N03 — Chronic nephritic syndrome
Is N03 billable?
No — N03 is a non-billable header code. N03 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 11 billable codes beneath N03.
Billable codes under this header
- 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
- N03.6Chronic nephritic syndrome with dense deposit disease
- 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
N03 at a glance
| Code | N03 |
|---|---|
| Description | Chronic 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 N03 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 N03.
- chronic glomerular disease
- chronic glomerulonephritis
- chronic nephritis
Excludes1 — never code together — inherited from N00-N08
The conditions below can never be reported together with N03 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 N03, but a patient may have both at the same time. When documentation supports it, N03 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 N03 is sequenced first depends on the reason for the encounter.
- any associated kidney failure (N17-N19).
What codes fall under N03? (11)
- 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
- N03.6Chronic nephritic syndrome with dense deposit disease
- 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
How long has N03 existed?
N03 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.