ICD-10 · PDGM grouping
N17-N19 — Acute kidney failure and chronic kidney disease
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
Codes in range
15
No clinical group
4
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
11 of the 15 codes in N17-N19 group to MMTA - Gastrointestinal tract and Genitourinary system. A further 4 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in N17-N19
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
Every code in N17-N19
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| N170 | Acute kidney failure with tubular necrosis | J | Can lead a claim |
| N171 | Acute kidney failure with acute cortical necrosis | J | Can lead a claim |
| N172 | Acute kidney failure with medullary necrosis | J | Can lead a claim |
| N178 | Other acute kidney failure | J | Can lead a claim |
| N179 | Acute kidney failure, unspecified | J | Can lead a claim |
| N181 | Chronic kidney disease, stage 1 | J | Can lead a claim, code first applies |
| N182 | Chronic kidney disease, stage 2 (mild) | J | Can lead a claim, code first applies |
| N1830 | Chronic kidney disease, stage 3 unspecified | J | Can lead a claim, code first applies |
| N1831 | Chronic kidney disease, stage 3a | J | Can lead a claim, code first applies |
| N1832 | Chronic kidney disease, stage 3b | J | Can lead a claim, code first applies |
| N184 | Chronic kidney disease, stage 4 (severe) | J | Can lead a claim, code first applies |
| N185 | Chronic kidney disease, stage 5 | None | Cannot lead a claim |
| N186 | End stage renal disease | None | Cannot lead a claim |
| N189 | Chronic kidney disease, unspecified | None | Cannot lead a claim |
| N19 | Unspecified kidney failure | None | Cannot lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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