ICD-10 · PDGM grouping
N05 Unspecified nephritic syndrome
All 11 codes in the N05 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 N05
10 of the 11 codes group to MMTA - Gastrointestinal tract and Genitourinary system (8) and MMTA - Other (2); 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 N05
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 |
|---|---|---|---|---|
| N05.0 | Unspecified nephritic syndrome with minor glomerular abnormalityCMS: Unsp nephritic syndrome with minor glomerular abnormality | Can lead a claim | J | None |
| N05.1 | Unspecified nephritic syndrome with focal and segmental glomerular lesionsCMS: Unsp neph syndrome w focal and segmental glomerular lesions | Can lead a claim | J | None |
| N05.2 | Unspecified nephritic syndrome with diffuse membranous glomerulonephritisCMS: Unsp nephritic syndrome w diffuse membranous glomrlneph | Can lead a claim | J | None |
| N05.3 | Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritisCMS: Unsp neph syndrome w diffuse mesangial prolif glomrlneph | Can lead a claim | J | None |
| N05.4 | Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisCMS: Unsp neph syndrome w diffuse endocaplry prolif glomrlneph | Can lead a claim | A | None |
| N05.5 | Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritisCMS: Unsp nephritic syndrome w diffuse mesangiocap glomrlneph | Can lead a claim | J | None |
| N05.6 | Unspecified nephritic syndrome with dense deposit disease | Can lead a claim | A | None |
| N05.7 | Unspecified nephritic syndrome with diffuse crescentic glomerulonephritisCMS: Unsp nephritic syndrome w diffuse crescentic glomrlneph | Can lead a claim | J | None |
| N05.8 | Unspecified nephritic syndrome with other morphologic changesCMS: Unsp nephritic syndrome with other morphologic changes | Can lead a claim | J | None |
| N05.9 | Unspecified nephritic syndrome with unspecified morphologic changesCMS: Unsp nephritic syndrome with unspecified morphologic changes | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| N05.A | Unspecified 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.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue