ICD-10 · PDGM grouping
N20-N23 — Urolithiasis
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
10
No clinical group
3
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
7 of the 10 codes in N20-N23 group to MMTA - Gastrointestinal tract and Genitourinary system. A further 3 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in N20-N23
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 N20-N23
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| N200 | Calculus of kidney | J | Can lead a claim |
| N201 | Calculus of ureter | J | Can lead a claim |
| N202 | Calculus of kidney with calculus of ureter | J | Can lead a claim |
| N209 | Urinary calculus, unspecified | None | Cannot lead a claim |
| N210 | Calculus in bladder | J | Can lead a claim |
| N211 | Calculus in urethra | J | Can lead a claim |
| N218 | Other lower urinary tract calculus | J | Can lead a claim |
| N219 | Calculus of lower urinary tract, unspecified | None | Cannot lead a claim |
| N22 | Calculus of urinary tract in diseases classified elsewhere | None | Cannot lead a claim |
| N23 | Unspecified renal colic | J | Can 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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