ICD-10 · PDGM grouping
W33 Accidental rifle, shotgun and larger firearm discharge and malfunction
All 30 codes in the W33 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
30
Can lead a claim
0
Cannot lead a claim
30
What CMS assigns to W33
None of the 30 codes is assigned a clinical group. None of the 30 is assigned a comorbidity subgroup. None can lead a claim.
Every code in W33
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 |
|---|---|---|---|---|
| W33.0 Accidental rifle, shotgun and larger firearm discharge | ||||
| W33.00 Accidental discharge of unspecified larger firearm | ||||
| W33.00XA | Accidental discharge of unspecified larger firearm, initial encounterCMS: Accidental discharge of unsp larger firearm, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.00XD | Accidental discharge of unspecified larger firearm, subsequent encounterCMS: Accidental discharge of unsp larger firearm, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.00XS | Accidental discharge of unspecified larger firearm, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.01 Accidental discharge of shotgun | ||||
| W33.01XA | Accidental discharge of shotgun, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.01XD | Accidental discharge of shotgun, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.01XS | Accidental discharge of shotgun, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.02 Accidental discharge of hunting rifle | ||||
| W33.02XA | Accidental discharge of hunting rifle, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.02XD | Accidental discharge of hunting rifle, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.02XS | Accidental discharge of hunting rifle, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.03 Accidental discharge of machine gun | ||||
| W33.03XA | Accidental discharge of machine gun, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.03XD | Accidental discharge of machine gun, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.03XS | Accidental discharge of machine gun, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.09 Accidental discharge of other larger firearm | ||||
| W33.09XA | Accidental discharge of other larger firearm, initial encounterCMS: Accidental discharge of other larger firearm, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.09XD | Accidental discharge of other larger firearm, subsequent encounterCMS: Accidental discharge of other larger firearm, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.09XS | Accidental discharge of other larger firearm, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.1 Accidental rifle, shotgun and larger firearm malfunction | ||||
| W33.10 Accidental malfunction of unspecified larger firearm | ||||
| W33.10XA | Accidental malfunction of unspecified larger firearm, initial encounterCMS: Accidental malfunction of unsp larger firearm, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.10XD | Accidental malfunction of unspecified larger firearm, subsequent encounterCMS: Accidental malfunction of unsp larger firearm, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.10XS | Accidental malfunction of unspecified larger firearm, sequelaCMS: Accidental malfunction of unsp larger firearm, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.11 Accidental malfunction of shotgun | ||||
| W33.11XA | Accidental malfunction of shotgun, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.11XD | Accidental malfunction of shotgun, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.11XS | Accidental malfunction of shotgun, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.12 Accidental malfunction of hunting rifle | ||||
| W33.12XA | Accidental malfunction of hunting rifle, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.12XD | Accidental malfunction of hunting rifle, subsequent encounterCMS: Accidental malfunction of hunting rifle, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.12XS | Accidental malfunction of hunting rifle, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.13 Accidental malfunction of machine gun | ||||
| W33.13XA | Accidental malfunction of machine gun, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.13XD | Accidental malfunction of machine gun, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.13XS | Accidental malfunction of machine gun, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.19 Accidental malfunction of other larger firearm | ||||
| W33.19XA | Accidental malfunction of other larger firearm, initial encounterCMS: Accidental malfunction of other larger firearm, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.19XD | Accidental malfunction of other larger firearm, subsequent encounterCMS: Accidental malfunction of other larger firearm, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W33.19XS | Accidental malfunction of other larger firearm, 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.
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