ICD-10 · PDGM grouping
N03 Chronic nephritic syndrome
All 11 codes in the N03 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
11
Can lead a claim
10
Cannot lead a claim
1
What CMS assigns to N03
10 of the 11 codes group to MMTA - Other (6) and MMTA - Gastrointestinal tract and Genitourinary system (4); 1 is assigned no clinical group. 1 of the 11 counts toward the Other disorders of the kidney and ureter, excluding chronic kidney disease and ESRD comorbidity subgroup; 10 are assigned none. 10 of the 11 can lead a claim.
- Other disorders of the kidney and ureter, excluding chronic kidney disease and ESRD: counts toward the high comorbidity tier only in an interaction pair.
Every code in N03
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| N03.0 | Chronic nephritic syndrome with minor glomerular abnormality | Can lead a claim | A | None |
| N03.1 | Chronic nephritic syndrome with focal and segmental glomerular lesionsCMS: Chronic neph syndrome w focal and seg glomerular lesions | Can lead a claim | J | None |
| N03.2 | Chronic nephritic syndrome with diffuse membranous glomerulonephritisCMS: Chronic nephritic syndrome w diffuse membranous glomrlneph | Can lead a claim | J | None |
| N03.3 | Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritisCMS: Chronic neph syndrome w diffuse mesangial prolif glomrlneph | Can lead a claim | J | None |
| N03.4 | Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisCMS: Chronic neph syndrome w diffuse endocaplry prolif glomrlneph | Can lead a claim | A | None |
| N03.5 | Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritisCMS: Chronic nephritic syndrome w diffuse mesangiocap glomrlneph | Can lead a claim | A | None |
| N03.6 | Chronic nephritic syndrome with dense deposit disease | Can lead a claim | A | None |
| N03.7 | Chronic nephritic syndrome with diffuse crescentic glomerulonephritisCMS: Chronic nephritic syndrome w diffuse crescentic glomrlneph | Can lead a claim | A | None |
| N03.8 | Chronic nephritic syndrome with other morphologic changes | Can lead a claim | A | None |
| N03.9 | Chronic nephritic syndrome with unspecified morphologic changesCMS: Chronic nephritic syndrome with unsp morphologic changes | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| N03.A | Chronic nephritic syndrome with C3 glomerulonephritis | Can lead a claim | J | Other disorders of the kidney and ureter, excluding chronic kidney disease and ESRD |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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