ICD-10 · PDGM grouping
X39 Exposure to other forces of nature
All 9 codes in the X39 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 X39
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 X39
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 |
|---|---|---|---|---|
| X39.0 Exposure to natural radiation | ||||
| X39.01 Exposure to radon | ||||
| X39.01XA | Exposure to radon, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.01XD | Exposure to radon, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.01XS | Exposure to radon, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.08 Exposure to other natural radiation | ||||
| X39.08XA | Exposure to other natural radiation, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.08XD | Exposure to other natural radiation, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.08XS | Exposure to other natural radiation, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.8 Other exposure to forces of nature | ||||
| X39.8XXA | Other exposure to forces of nature, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.8XXD | Other exposure to forces of nature, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X39.8XXS | Other exposure to forces of nature, 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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