ICD-10 · PDGM grouping
X30-X39 — Exposure to forces of nature
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.
OASIS-E2 v1.00.0 · ingested 2026-04-26
Codes in range
60
No clinical group
60
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
None of the 60 codes in X30-X39 is assigned a PDGM clinical group. A 30-day period cannot be grouped from any of them, so none can hold the primary position on a home health claim.
Every code in X30-X39
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| X30XXXA | Exposure to excessive natural heat, initial encounter | None | Cannot group |
| X30XXXD | Exposure to excessive natural heat, subsequent encounter | None | Cannot group |
| X30XXXS | Exposure to excessive natural heat, sequela | None | Cannot group |
| X31XXXA | Exposure to excessive natural cold, initial encounter | None | Cannot group |
| X31XXXD | Exposure to excessive natural cold, subsequent encounter | None | Cannot group |
| X31XXXS | Exposure to excessive natural cold, sequela | None | Cannot group |
| X32XXXA | Exposure to sunlight, initial encounter | None | Cannot group |
| X32XXXD | Exposure to sunlight, subsequent encounter | None | Cannot group |
| X32XXXS | Exposure to sunlight, sequela | None | Cannot group |
| X34XXXA | Earthquake, initial encounter | None | Cannot group |
| X34XXXD | Earthquake, subsequent encounter | None | Cannot group |
| X34XXXS | Earthquake, sequela | None | Cannot group |
| X35XXXA | Volcanic eruption, initial encounter | None | Cannot group |
| X35XXXD | Volcanic eruption, subsequent encounter | None | Cannot group |
| X35XXXS | Volcanic eruption, sequela | None | Cannot group |
| X360XXA | Collapse of dam or man-made struct cause earth movmnt, init | None | Cannot group |
| X360XXD | Collapse of dam or man-made struct cause earth movmnt, subs | None | Cannot group |
| X360XXS | Collapse of dam or man-made struct cause earth movmnt, sqla | None | Cannot group |
| X361XXA | Avalanche, landslide, or mudslide, initial encounter | None | Cannot group |
| X361XXD | Avalanche, landslide, or mudslide, subsequent encounter | None | Cannot group |
| X361XXS | Avalanche, landslide, or mudslide, sequela | None | Cannot group |
| X370XXA | Hurricane, initial encounter | None | Cannot group |
| X370XXD | Hurricane, subsequent encounter | None | Cannot group |
| X370XXS | Hurricane, sequela | None | Cannot group |
| X371XXA | Tornado, initial encounter | None | Cannot group |
| X371XXD | Tornado, subsequent encounter | None | Cannot group |
| X371XXS | Tornado, sequela | None | Cannot group |
| X372XXA | Blizzard (snow)(ice), initial encounter | None | Cannot group |
| X372XXD | Blizzard (snow)(ice), subsequent encounter | None | Cannot group |
| X372XXS | Blizzard (snow)(ice), sequela | None | Cannot group |
| X373XXA | Dust storm, initial encounter | None | Cannot group |
| X373XXD | Dust storm, subsequent encounter | None | Cannot group |
| X373XXS | Dust storm, sequela | None | Cannot group |
| X3741XA | Tidal wave due to earthquake or volcanic eruption, init | None | Cannot group |
| X3741XD | Tidal wave due to earthquake or volcanic eruption, subs | None | Cannot group |
| X3741XS | Tidal wave due to earthquake or volcanic eruption, sequela | None | Cannot group |
| X3742XA | Tidal wave due to storm, initial encounter | None | Cannot group |
| X3742XD | Tidal wave due to storm, subsequent encounter | None | Cannot group |
| X3742XS | Tidal wave due to storm, sequela | None | Cannot group |
| X3743XA | Tidal wave due to landslide, initial encounter | None | Cannot group |
| X3743XD | Tidal wave due to landslide, subsequent encounter | None | Cannot group |
| X3743XS | Tidal wave due to landslide, sequela | None | Cannot group |
| X378XXA | Other cataclysmic storms, initial encounter | None | Cannot group |
| X378XXD | Other cataclysmic storms, subsequent encounter | None | Cannot group |
| X378XXS | Other cataclysmic storms, sequela | None | Cannot group |
| X379XXA | Unspecified cataclysmic storm, initial encounter | None | Cannot group |
| X379XXD | Unspecified cataclysmic storm, subsequent encounter | None | Cannot group |
| X379XXS | Unspecified cataclysmic storm, sequela | None | Cannot group |
| X38XXXA | Flood, initial encounter | None | Cannot group |
| X38XXXD | Flood, subsequent encounter | None | Cannot group |
| X38XXXS | Flood, sequela | None | Cannot group |
| X3901XA | Exposure to radon, initial encounter | None | Cannot group |
| X3901XD | Exposure to radon, subsequent encounter | None | Cannot group |
| X3901XS | Exposure to radon, sequela | None | Cannot group |
| X3908XA | Exposure to other natural radiation, initial encounter | None | Cannot group |
| X3908XD | Exposure to other natural radiation, subsequent encounter | None | Cannot group |
| X3908XS | Exposure to other natural radiation, sequela | None | Cannot group |
| X398XXA | Other exposure to forces of nature, initial encounter | None | Cannot group |
| X398XXD | Other exposure to forces of nature, subsequent encounter | None | Cannot group |
| X398XXS | Other exposure to forces of nature, sequela | None | Cannot group |
Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. 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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