ICD-10 · PDGM grouping
Y23 Rifle, shotgun and larger firearm discharge, undetermined intent
All 18 codes in the Y23 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.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
18
Can lead a claim
0
Cannot lead a claim
18
What CMS assigns to Y23
None of the 18 codes is assigned a clinical group. None of the 18 is assigned a comorbidity subgroup. None can lead a claim.
Every code in Y23
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 |
|---|---|---|---|---|
| Y23.0 Shotgun discharge, undetermined intent | ||||
| Y23.0XXA | Shotgun discharge, undetermined intent, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.0XXD | Shotgun discharge, undetermined intent, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.0XXS | Shotgun discharge, undetermined intent, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.1 Hunting rifle discharge, undetermined intent | ||||
| Y23.1XXA | Hunting rifle discharge, undetermined intent, initial encounterCMS: Hunting rifle discharge, undetermined intent, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.1XXD | Hunting rifle discharge, undetermined intent, subsequent encounterCMS: Hunting rifle discharge, undetermined intent, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.1XXS | Hunting rifle discharge, undetermined intent, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.2 Military firearm discharge, undetermined intent | ||||
| Y23.2XXA | Military firearm discharge, undetermined intent, initial encounterCMS: Military firearm discharge, undetermined intent, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.2XXD | Military firearm discharge, undetermined intent, subsequent encounterCMS: Military firearm discharge, undetermined intent, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.2XXS | Military firearm discharge, undetermined intent, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.3 Machine gun discharge, undetermined intent | ||||
| Y23.3XXA | Machine gun discharge, undetermined intent, initial encounterCMS: Machine gun discharge, undetermined intent, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.3XXD | Machine gun discharge, undetermined intent, subsequent encounterCMS: Machine gun discharge, undetermined intent, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.3XXS | Machine gun discharge, undetermined intent, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.8 Other larger firearm discharge, undetermined intent | ||||
| Y23.8XXA | Other larger firearm discharge, undetermined intent, initial encounterCMS: Oth larger firearm discharge, undetermined intent, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.8XXD | Other larger firearm discharge, undetermined intent, subsequent encounterCMS: Oth larger firearm discharge, undetermined intent, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.8XXS | Other larger firearm discharge, undetermined intent, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.9 Unspecified larger firearm discharge, undetermined intent | ||||
| Y23.9XXA | Unspecified larger firearm discharge, undetermined intent, initial encounterCMS: Unsp larger firearm discharge, undetermined intent, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.9XXD | Unspecified larger firearm discharge, undetermined intent, subsequent encounterCMS: Unsp larger firearm discharge, undetermined intent, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| Y23.9XXS | Unspecified larger firearm discharge, undetermined intent, sequelaCMS: Unsp larger firearm discharge, undetermined intent, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | 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.
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