| W56 | Contact with nonvenomous marine animal | NON-BILLABLE CODE |
| W56.0 | Contact with dolphin | NON-BILLABLE CODE |
| W56.01 | Bitten by dolphin | NON-BILLABLE CODE |
| W56.01XA | Bitten by dolphin, initial encounter | BILLABLE CODE |
| W56.01XD | Bitten by dolphin, subsequent encounter | BILLABLE CODE |
| W56.01XS | Bitten by dolphin, sequela | BILLABLE CODE |
| W56.02 | Struck by dolphin | NON-BILLABLE CODE |
| W56.02XA | Struck by dolphin, initial encounter | BILLABLE CODE |
| W56.02XD | Struck by dolphin, subsequent encounter | BILLABLE CODE |
| W56.02XS | Struck by dolphin, sequela | BILLABLE CODE |
| W56.09 | Other contact with dolphin | NON-BILLABLE CODE |
| W56.09XA | Other contact with dolphin, initial encounter | BILLABLE CODE |
| W56.09XD | Other contact with dolphin, subsequent encounter | BILLABLE CODE |
| W56.09XS | Other contact with dolphin, sequela | BILLABLE CODE |
| W56.1 | Contact with sea lion | NON-BILLABLE CODE |
| W56.11 | Bitten by sea lion | NON-BILLABLE CODE |
| W56.11XD | Bitten by sea lion, subsequent encounter | BILLABLE CODE |
| W56.11XS | Bitten by sea lion, sequela | BILLABLE CODE |
| W56.12 | Struck by sea lion | NON-BILLABLE CODE |
| W56.12XA | Struck by sea lion, initial encounter | BILLABLE CODE |
| W56.12XD | Struck by sea lion, subsequent encounter | BILLABLE CODE |
| W56.12XS | Struck by sea lion, sequela | BILLABLE CODE |
| W56.19 | Other contact with sea lion | NON-BILLABLE CODE |
| W56.19XA | Other contact with sea lion, initial encounter | BILLABLE CODE |
| W56.19XD | Other contact with sea lion, subsequent encounter | BILLABLE CODE |
| W56.19XS | Other contact with sea lion, sequela | BILLABLE CODE |
| W56.2 | Contact with orca | NON-BILLABLE CODE |
| W56.21 | Bitten by orca | NON-BILLABLE CODE |
| W56.21XA | Bitten by orca, initial encounter | BILLABLE CODE |
| W56.21XD | Bitten by orca, subsequent encounter | BILLABLE CODE |
| W56.21XS | Bitten by orca, sequela | BILLABLE CODE |
| W56.22 | Struck by orca | NON-BILLABLE CODE |
| W56.22XA | Struck by orca, initial encounter | BILLABLE CODE |
| W56.22XD | Struck by orca, subsequent encounter | BILLABLE CODE |
| W56.22XS | Struck by orca, sequela | BILLABLE CODE |
| W56.29 | Other contact with orca | NON-BILLABLE CODE |
| W56.29XA | Other contact with orca, initial encounter | BILLABLE CODE |
| W56.29XD | Other contact with orca, subsequent encounter | BILLABLE CODE |
| W56.29XS | Other contact with orca, sequela | BILLABLE CODE |
| W56.3 | Contact with other marine mammals | NON-BILLABLE CODE |
| W56.31 | Bitten by other marine mammals | NON-BILLABLE CODE |
| W56.31XA | Bitten by other marine mammals, initial encounter | BILLABLE CODE |
| W56.31XD | Bitten by other marine mammals, subsequent encounter | BILLABLE CODE |
| W56.31XS | Bitten by other marine mammals, sequela | BILLABLE CODE |
| W56.32 | Struck by other marine mammals | NON-BILLABLE CODE |
| W56.32XA | Struck by other marine mammals, initial encounter | BILLABLE CODE |
| W56.32XD | Struck by other marine mammals, subsequent encounter | BILLABLE CODE |
| W56.32XS | Struck by other marine mammals, sequela | BILLABLE CODE |
| W56.39 | Other contact with other marine mammals | NON-BILLABLE CODE |
| W56.39XA | Other contact with other marine mammals, initial encounter | BILLABLE CODE |
| W56.39XD | Other contact with other marine mammals, subsequent encounter | BILLABLE CODE |
| W56.39XS | Other contact with other marine mammals, sequela | BILLABLE CODE |
| W56.4 | Contact with shark | NON-BILLABLE CODE |
| W56.41 | Bitten by shark | NON-BILLABLE CODE |
| W56.41XA | Bitten by shark, initial encounter | BILLABLE CODE |
| W56.41XD | Bitten by shark, subsequent encounter | BILLABLE CODE |
| W56.41XS | Bitten by shark, sequela | BILLABLE CODE |
| W56.42 | Struck by shark | NON-BILLABLE CODE |
| W56.42XA | Struck by shark, initial encounter | BILLABLE CODE |
| W56.42XD | Struck by shark, subsequent encounter | BILLABLE CODE |
| W56.42XS | Struck by shark, sequela | BILLABLE CODE |
| W56.49 | Other contact with shark | NON-BILLABLE CODE |
| W56.49XA | Other contact with shark, initial encounter | BILLABLE CODE |
| W56.49XD | Other contact with shark, subsequent encounter | BILLABLE CODE |
| W56.49XS | Other contact with shark, sequela | BILLABLE CODE |
| W56.5 | Contact with other fish | NON-BILLABLE CODE |
| W56.51 | Bitten by other fish | NON-BILLABLE CODE |
| W56.51XA | Bitten by other fish, initial encounter | BILLABLE CODE |
| W56.51XD | Bitten by other fish, subsequent encounter | BILLABLE CODE |
| W56.51XS | Bitten by other fish, sequela | BILLABLE CODE |
| W56.52 | Struck by other fish | NON-BILLABLE CODE |
| W56.52XA | Struck by other fish, initial encounter | BILLABLE CODE |
| W56.52XD | Struck by other fish, subsequent encounter | BILLABLE CODE |
| W56.52XS | Struck by other fish, sequela | BILLABLE CODE |
| W56.59 | Other contact with other fish | NON-BILLABLE CODE |
| W56.59XA | Other contact with other fish, initial encounter | BILLABLE CODE |
| W56.59XD | Other contact with other fish, subsequent encounter | BILLABLE CODE |
| W56.59XS | Other contact with other fish, sequela | BILLABLE CODE |
| W56.8 | Contact with other nonvenomous marine animals | NON-BILLABLE CODE |
| W56.81 | Bitten by other nonvenomous marine animals | NON-BILLABLE CODE |
| W56.81XA | Bitten by other nonvenomous marine animals, initial encounter | BILLABLE CODE |
| W56.81XD | Bitten by other nonvenomous marine animals, subsequent encounter | BILLABLE CODE |
| W56.81XS | Bitten by other nonvenomous marine animals, sequela | BILLABLE CODE |
| W56.82 | Struck by other nonvenomous marine animals | NON-BILLABLE CODE |
| W56.82XA | Struck by other nonvenomous marine animals, initial encounter | BILLABLE CODE |
| W56.82XD | Struck by other nonvenomous marine animals, subsequent encounter | BILLABLE CODE |
| W56.82XS | Struck by other nonvenomous marine animals, sequela | BILLABLE CODE |
| W56.89 | Other contact with other nonvenomous marine animals | NON-BILLABLE CODE |
| W56.89XA | Other contact with other nonvenomous marine animals, initial encounter | BILLABLE CODE |
| W56.89XD | Other contact with other nonvenomous marine animals, subsequent encounter | BILLABLE CODE |
| W56.89XS | Other contact with other nonvenomous marine animals, sequela | BILLABLE CODE |
