ICD-10 · PDGM grouping
W90 Exposure to other nonionizing radiation
All 12 codes in the W90 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 W90
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 W90
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 |
|---|---|---|---|---|
| W90.0 Exposure to radiofrequency | ||||
| W90.0XXA | Exposure to radiofrequency, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.0XXD | Exposure to radiofrequency, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.0XXS | Exposure to radiofrequency, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.1 Exposure to infrared radiation | ||||
| W90.1XXA | Exposure to infrared radiation, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.1XXD | Exposure to infrared radiation, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.1XXS | Exposure to infrared radiation, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.2 Exposure to laser radiation | ||||
| W90.2XXA | Exposure to laser radiation, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.2XXD | Exposure to laser radiation, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.2XXS | Exposure to laser radiation, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.8 Exposure to other nonionizing radiation | ||||
| W90.8XXA | Exposure to other nonionizing radiation, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.8XXD | Exposure to other nonionizing radiation, subsequent encounterCMS: Exposure to other nonionizing radiation, subs encntr | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| W90.8XXS | Exposure to other nonionizing radiation, 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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