ICD-10 · PDGM grouping
N28 Other disorders of kidney and ureter, not elsewhere classified
All 10 codes in the N28 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
10
Can lead a claim
9
Cannot lead a claim
1
What CMS assigns to N28
9 of the 10 codes group to MMTA - Gastrointestinal tract and Genitourinary system (7) and MMTA - Other (2); 1 is assigned no clinical group. None of the 10 is assigned a comorbidity subgroup. 9 of the 10 can lead a claim.
Every code in N28
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 |
|---|---|---|---|---|
| N28.0 | Ischemia and infarction of kidney | Can lead a claim | J | None |
| N28.1 | Cyst of kidney, acquired | Can lead a claim | J | None |
| N28.8 Other specified disorders of kidney and ureter | ||||
| N28.81 | Hypertrophy of kidney | Can lead a claim | A | None |
| N28.82 | Megaloureter | Can lead a claim | J | None |
| N28.83 | Nephroptosis | Can lead a claim | A | None |
| N28.84 | Pyelitis cystica | Can lead a claim | J | None |
| N28.85 | Pyeloureteritis cystica | Can lead a claim | J | None |
| N28.86 | Ureteritis cystica | Can lead a claim | J | None |
| N28.89 | Other specified disorders of kidney and ureter | Can lead a claim | J | None |
| N28.9 | Disorder of kidney and ureter, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
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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