| 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 |
