ICD-10 · PDGM grouping
W20 Struck by thrown, projected or falling object
All 9 codes in the W20 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.
Codes in family
9
Can lead a claim
0
Cannot lead a claim
9
What CMS assigns to W20
None of the 9 codes is assigned a clinical group. None of the 9 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 9.
Code first
CMS grouper convention 170, on all 9 codes. Code first:
- any associated:
- cataclysm (X34-X39)
- lightning strike (T75.00)
Every code in W20
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 |
|---|---|---|---|---|
| W20.0 Struck by falling object in cave-in | ||||
| W20.0XXA | Struck by falling object in cave-in, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.0XXD | Struck by falling object in cave-in, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.0XXS | Struck by falling object in cave-in, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.1 Struck by object due to collapse of building | ||||
| W20.1XXA | Struck by object due to collapse of building, initial encounterCMS: Struck by object due to collapse of building, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.1XXD | Struck by object due to collapse of building, subsequent encounterCMS: Struck by object due to collapse of building, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.1XXS | Struck by object due to collapse of building, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.8 Other cause of strike by thrown, projected or falling object | ||||
| W20.8XXA | Other cause of strike by thrown, projected or falling object, initial encounterCMS: Oth cause of strike by thrown, projected or fall obj, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.8XXD | Other cause of strike by thrown, projected or falling object, subsequent encounterCMS: Oth cause of strike by thrown, projected or fall obj, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W20.8XXS | Other cause of strike by thrown, projected or falling object, sequelaCMS: Oth cause of strike by thrown, projected or fall obj, sqla | 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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