ICD-10 · PDGM grouping
X00 Exposure to uncontrolled fire in building or structure
All 21 codes in the X00 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
21
Can lead a claim
0
Cannot lead a claim
21
What CMS assigns to X00
None of the 21 codes is assigned a clinical group. None of the 21 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 21.
Code first
CMS grouper convention 12, on all 21 codes. Code first:
- underlying disease
Every code in X00
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 |
|---|---|---|---|---|
| X00.0 Exposure to flames in uncontrolled fire in building or structure | ||||
| X00.0XXA | Exposure to flames in uncontrolled fire in building or structure, initial encounterCMS: Exposure to flames in uncontrolled fire in bldg, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.0XXD | Exposure to flames in uncontrolled fire in building or structure, subsequent encounterCMS: Exposure to flames in uncontrolled fire in bldg, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.0XXS | Exposure to flames in uncontrolled fire in building or structure, sequelaCMS: Exposure to flames in uncontrolled fire in bldg, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.1 Exposure to smoke in uncontrolled fire in building or structure | ||||
| X00.1XXA | Exposure to smoke in uncontrolled fire in building or structure, initial encounterCMS: Exposure to smoke in uncontrolled fire in bldg, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.1XXD | Exposure to smoke in uncontrolled fire in building or structure, subsequent encounterCMS: Exposure to smoke in uncontrolled fire in bldg, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.1XXS | Exposure to smoke in uncontrolled fire in building or structure, sequelaCMS: Exposure to smoke in uncontrolled fire in bldg, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.2 Injury due to collapse of burning building or structure in uncontrolled fire | ||||
| X00.2XXA | Injury due to collapse of burning building or structure in uncontrolled fire, initial encounterCMS: Injury due to collapse of burn bldg in uncntrld fire, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.2XXD | Injury due to collapse of burning building or structure in uncontrolled fire, subsequent encounterCMS: Injury due to collapse of burn bldg in uncntrld fire, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.2XXS | Injury due to collapse of burning building or structure in uncontrolled fire, sequelaCMS: Injury due to collapse of burn bldg in uncntrld fire, sqla | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.3 Fall from burning building or structure in uncontrolled fire | ||||
| X00.3XXA | Fall from burning building or structure in uncontrolled fire, initial encounterCMS: Fall from burning bldg in uncontrolled fire, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.3XXD | Fall from burning building or structure in uncontrolled fire, subsequent encounterCMS: Fall from burning bldg in uncontrolled fire, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.3XXS | Fall from burning building or structure in uncontrolled fire, sequelaCMS: Fall from burning bldg in uncontrolled fire, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.4 Hit by object from burning building or structure in uncontrolled fire | ||||
| X00.4XXA | Hit by object from burning building or structure in uncontrolled fire, initial encounterCMS: Hit by object from burning bldg in uncontrolled fire, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.4XXD | Hit by object from burning building or structure in uncontrolled fire, subsequent encounterCMS: Hit by object from burning bldg in uncontrolled fire, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.4XXS | Hit by object from burning building or structure in uncontrolled fire, sequelaCMS: Hit by object from burning bldg in uncntrld fire, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.5 Jump from burning building or structure in uncontrolled fire | ||||
| X00.5XXA | Jump from burning building or structure in uncontrolled fire, initial encounterCMS: Jump from burning bldg in uncontrolled fire, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.5XXD | Jump from burning building or structure in uncontrolled fire, subsequent encounterCMS: Jump from burning bldg in uncontrolled fire, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.5XXS | Jump from burning building or structure in uncontrolled fire, sequelaCMS: Jump from burning bldg in uncontrolled fire, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.8 Other exposure to uncontrolled fire in building or structure | ||||
| X00.8XXA | Other exposure to uncontrolled fire in building or structure, initial encounterCMS: Oth exposure to uncontrolled fire in bldg, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.8XXD | Other exposure to uncontrolled fire in building or structure, subsequent encounterCMS: Oth exposure to uncontrolled fire in bldg, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X00.8XXS | Other exposure to uncontrolled fire in building or structure, sequelaCMS: Oth exposure to uncontrolled fire in bldg, 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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