N03
Chronic nephritic syndrome
N03 is a non-billable ICD-10-CM code category for chronic nephritic syndrome. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are N03.0 Chronic nephritic syndrome with minor glomerular abnormality, N03.1 Chronic nephritic syndrome with focal and segmental glomerular lesions, N03.2 Chronic nephritic syndrome with diffuse membranous glomerulonephritis, N03.3 Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis and 7 more. Its coding notes include a Code also instruction, 4 Excludes1 entries and 8 Excludes2 entries.
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- 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)
Includes
Further defines or gives examples of the content of the category.
- chronic glomerular disease
- chronic glomerulonephritis
- chronic nephritis
More specific codes under N03 11
- N03.0Chronic nephritic syndrome with minor glomerular abnormalityBillable
- N03.1Chronic nephritic syndrome with focal and segmental glomerular lesionsBillable
- N03.2Chronic nephritic syndrome with diffuse membranous glomerulonephritisBillable
- N03.3Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritisBillable
- N03.4Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisBillable
- N03.5Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritisBillable
- N03.6Chronic nephritic syndrome with dense deposit diseaseBillable
- N03.7Chronic nephritic syndrome with diffuse crescentic glomerulonephritisBillable
- N03.8Chronic nephritic syndrome with other morphologic changesBillable
- N03.9Chronic nephritic syndrome with unspecified morphologic changesBillable
- N03.AChronic nephritic syndrome with C3 glomerulonephritisBillable