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 v07.1.26.
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.
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 | Accepted |
| N201 | Calculus of ureter | J | Accepted |
| N202 | Calculus of kidney with calculus of ureter | J | Accepted |
| N209 | Urinary calculus, unspecified | None | Cannot group |
| N210 | Calculus in bladder | J | Accepted |
| N211 | Calculus in urethra | J | Accepted |
| N218 | Other lower urinary tract calculus | J | Accepted |
| N219 | Calculus of lower urinary tract, unspecified | None | Cannot group |
| N22 | Calculus of urinary tract in diseases classified elsewhere | None | Cannot group |
| N23 | Unspecified renal colic | J | Accepted |
Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. 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.
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.