ICD-10 · PDGM grouping
X37 Cataclysmic storm
All 27 codes in the X37 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
27
Can lead a claim
0
Cannot lead a claim
27
What CMS assigns to X37
None of the 27 codes is assigned a clinical group. None of the 27 is assigned a comorbidity subgroup. None can lead a claim.
Every code in X37
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 |
|---|---|---|---|---|
| X37.0 Hurricane | ||||
| X37.0XXA | Hurricane, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.0XXD | Hurricane, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.0XXS | Hurricane, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.1 Tornado | ||||
| X37.1XXA | Tornado, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.1XXD | Tornado, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.1XXS | Tornado, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.2 Blizzard (snow)(ice) | ||||
| X37.2XXA | Blizzard (snow)(ice), initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.2XXD | Blizzard (snow)(ice), subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.2XXS | Blizzard (snow)(ice), sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.3 Dust storm | ||||
| X37.3XXA | Dust storm, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.3XXD | Dust storm, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.3XXS | Dust storm, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.4 Tidalwave | ||||
| X37.41 Tidal wave due to earthquake or volcanic eruption | ||||
| X37.41XA | Tidal wave due to earthquake or volcanic eruption, initial encounterCMS: Tidal wave due to earthquake or volcanic eruption, init | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.41XD | Tidal wave due to earthquake or volcanic eruption, subsequent encounterCMS: Tidal wave due to earthquake or volcanic eruption, subs | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.41XS | Tidal wave due to earthquake or volcanic eruption, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.42 Tidal wave due to storm | ||||
| X37.42XA | Tidal wave due to storm, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.42XD | Tidal wave due to storm, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.42XS | Tidal wave due to storm, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.43 Tidal wave due to landslide | ||||
| X37.43XA | Tidal wave due to landslide, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.43XD | Tidal wave due to landslide, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.43XS | Tidal wave due to landslide, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.8 Other cataclysmic storms | ||||
| X37.8XXA | Other cataclysmic storms, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.8XXD | Other cataclysmic storms, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.8XXS | Other cataclysmic storms, sequela | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.9 Unspecified cataclysmic storm | ||||
| X37.9XXA | Unspecified cataclysmic storm, initial encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.9XXD | Unspecified cataclysmic storm, subsequent encounter | Cannot lead a claimExternal cause of injury code not reportable as principal diagnosis | None | None |
| X37.9XXS | Unspecified cataclysmic storm, 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