| X37 | Cataclysmic storm | NON-BILLABLE CODE |
| X37.0 | Hurricane | NON-BILLABLE CODE |
| X37.0XXA | Hurricane, initial encounter | BILLABLE CODE |
| X37.0XXD | Hurricane, subsequent encounter | BILLABLE CODE |
| X37.0XXS | Hurricane, sequela | BILLABLE CODE |
| X37.1 | Tornado | NON-BILLABLE CODE |
| X37.1XXA | Tornado, initial encounter | BILLABLE CODE |
| X37.1XXD | Tornado, subsequent encounter | BILLABLE CODE |
| X37.1XXS | Tornado, sequela | BILLABLE CODE |
| X37.2 | Blizzard (snow)(ice) | NON-BILLABLE CODE |
| X37.2XXA | Blizzard (snow)(ice), initial encounter | BILLABLE CODE |
| X37.2XXD | Blizzard (snow)(ice), subsequent encounter | BILLABLE CODE |
| X37.2XXS | Blizzard (snow)(ice), sequela | BILLABLE CODE |
| X37.3 | Dust storm | NON-BILLABLE CODE |
| X37.3XXA | Dust storm, initial encounter | BILLABLE CODE |
| X37.3XXD | Dust storm, subsequent encounter | BILLABLE CODE |
| X37.3XXS | Dust storm, sequela | BILLABLE CODE |
| X37.4 | Tidalwave | NON-BILLABLE CODE |
| X37.41 | Tidal wave due to earthquake or volcanic eruption | NON-BILLABLE CODE |
| X37.41XA | Tidal wave due to earthquake or volcanic eruption, initial encounter | BILLABLE CODE |
| X37.41XD | Tidal wave due to earthquake or volcanic eruption, subsequent encounter | BILLABLE CODE |
| X37.41XS | Tidal wave due to earthquake or volcanic eruption, sequela | BILLABLE CODE |
| X37.42 | Tidal wave due to storm | NON-BILLABLE CODE |
| X37.42XA | Tidal wave due to storm, initial encounter | BILLABLE CODE |
| X37.42XD | Tidal wave due to storm, subsequent encounter | BILLABLE CODE |
| X37.42XS | Tidal wave due to storm, sequela | BILLABLE CODE |
| X37.43 | Tidal wave due to landslide | NON-BILLABLE CODE |
| X37.43XA | Tidal wave due to landslide, initial encounter | BILLABLE CODE |
| X37.43XD | Tidal wave due to landslide, subsequent encounter | BILLABLE CODE |
| X37.43XS | Tidal wave due to landslide, sequela | BILLABLE CODE |
| X37.8 | Other cataclysmic storms | NON-BILLABLE CODE |
| X37.8XXA | Other cataclysmic storms, initial encounter | BILLABLE CODE |
| X37.8XXD | Other cataclysmic storms, subsequent encounter | BILLABLE CODE |
| X37.8XXS | Other cataclysmic storms, sequela | BILLABLE CODE |
| X37.9 | Unspecified cataclysmic storm | NON-BILLABLE CODE |
| X37.9XXA | Unspecified cataclysmic storm, initial encounter | BILLABLE CODE |
| X37.9XXD | Unspecified cataclysmic storm, subsequent encounter | BILLABLE CODE |
