Chronic nephritic syndrome (N03) ICD-10-CM
The N03 code range covers chronic nephritic syndrome with 12 ICD-10-CM diagnosis codes. 11 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- chronic glomerular disease
- chronic glomerulonephritis
- chronic nephritis
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the N03 Range 12 codes · 11 billable
- N03 Chronic nephritic syndromeNon-billable
- 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
- N03.4 Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
- N03.5 Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- N03.6 Chronic nephritic syndrome with dense deposit disease
- N03.7 Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
- N03.8 Chronic nephritic syndrome with other morphologic changes
- N03.9 Chronic nephritic syndrome with unspecified morphologic changes
- N03.A Chronic nephritic syndrome with C3 glomerulonephritis
About the N03 Code Range
Chronic nephritic syndrome belongs to a group of diseases involving the kidney’s filtering structures, called glomeruli.
The subdivisions of N03 distinguish the named changes in those structures, including minor abnormalities, focal and segmental lesions, and diffuse forms of glomerulonephritis. Separate codes identify dense deposit disease and C3 glomerulonephritis. The category also has subdivisions for other or unspecified morphologic changes.
Chronic nephritis is another term associated with this category.
Questions About This Page
How many billable codes are in the N03 range?
Of the 12 codes in this range, 11 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the N03 range classify?
The range classifies chronic nephritic syndrome. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
