ICD-10 · PDGM grouping
W40 Explosion of other materials
All 12 codes in the W40 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
12
Can lead a claim
0
Cannot lead a claim
12
What CMS assigns to W40
None of the 12 codes is assigned a clinical group. None of the 12 is assigned a comorbidity subgroup. None can lead a claim.
Every code in W40
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 |
|---|---|---|---|---|
| W40.0 Explosion of blasting material | ||||
| W40.0XXA | Explosion of blasting material, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.0XXD | Explosion of blasting material, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.0XXS | Explosion of blasting material, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.1 Explosion of explosive gases | ||||
| W40.1XXA | Explosion of explosive gases, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.1XXD | Explosion of explosive gases, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.1XXS | Explosion of explosive gases, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.8 Explosion of other specified explosive materials | ||||
| W40.8XXA | Explosion of other specified explosive materials, initial encounterCMS: Explosion of oth explosive materials, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.8XXD | Explosion of other specified explosive materials, subsequent encounterCMS: Explosion of oth explosive materials, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.8XXS | Explosion of other specified explosive materials, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.9 Explosion of unspecified explosive materials | ||||
| W40.9XXA | Explosion of unspecified explosive materials, initial encounterCMS: Explosion of unspecified explosive materials, init encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.9XXD | Explosion of unspecified explosive materials, subsequent encounterCMS: Explosion of unspecified explosive materials, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W40.9XXS | Explosion of unspecified explosive materials, 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