October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

Y24 Other and unspecified firearm discharge, undetermined intent

All 9 codes in the Y24 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

9

Can lead a claim

0

Cannot lead a claim

9

What CMS assigns to Y24

None of the 9 codes is assigned a clinical group. None of the 9 is assigned a comorbidity subgroup. None can lead a claim.

Every code in Y24

Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
Y24.0 Airgun discharge, undetermined intent
Y24.0XXAAirgun discharge, undetermined intent, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.0XXDAirgun discharge, undetermined intent, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.0XXSAirgun discharge, undetermined intent, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.8 Other firearm discharge, undetermined intent
Y24.8XXAOther firearm discharge, undetermined intent, initial encounterCMS: Other firearm discharge, undetermined intent, init encntrCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.8XXDOther firearm discharge, undetermined intent, subsequent encounterCMS: Other firearm discharge, undetermined intent, subs encntrCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.8XXSOther firearm discharge, undetermined intent, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.9 Unspecified firearm discharge, undetermined intent
Y24.9XXAUnspecified firearm discharge, undetermined intent, initial encounterCMS: Unsp firearm discharge, undetermined intent, init encntrCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.9XXDUnspecified firearm discharge, undetermined intent, subsequent encounterCMS: Unsp firearm discharge, undetermined intent, subs encntrCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
Y24.9XXSUnspecified firearm discharge, undetermined intent, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone

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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