W56Not billable, use a more specific code below
Contact with nonvenomous marine animal
In Exposure to animate mechanical forces (W50-W64), chapter 20: External Causes of Morbidity
63 billable codes under W56: none are a CC or MCC; none map to an HCC.
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Instructional notes
Excludes1: not coded here, use a different code
- contact with venomous marine animal (T63.-)
Also applies, from Exposure to animate mechanical forces (W50-W64)
These notes sit on W50-W64 and apply to every code under it, including W56.
Excludes1: not coded here, use a different code
- Toxic effect of contact with venomous animals and plants (T63.-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.
- General External Cause Coding Guidelines (page 88)
- Place of Occurrence Guideline (page 89)
- Activity Code (page 89)
- Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
- If the Reporting Format Limits the Number of External Cause Codes (page 90)
- Multiple External Cause Coding Guidelines (page 90)
- Child and Adult Abuse Guideline (page 90)
- Unknown or Undetermined Intent Guideline (page 91)
All codes under W56
W56 can't be used on a claim. Pick a billable code below; grey headings group them.
- W56.0Contact with dolphin
- W56.01Bitten by dolphin
- W56.01XABitten by dolphin, initial encounter
- W56.01XDBitten by dolphin, subsequent encounter
- W56.01XSBitten by dolphin, sequela
- W56.02Struck by dolphin
- W56.02XAStruck by dolphin, initial encounter
- W56.02XDStruck by dolphin, subsequent encounter
- W56.02XSStruck by dolphin, sequela
- W56.09Other contact with dolphin
- W56.09XAOther contact with dolphin, initial encounter
- W56.09XDOther contact with dolphin, subsequent encounter
- W56.09XSOther contact with dolphin, sequela
- W56.1Contact with sea lion
- W56.11Bitten by sea lion
- W56.11XABitten by sea lion, initial encounter
- W56.11XDBitten by sea lion, subsequent encounter
- W56.11XSBitten by sea lion, sequela
- W56.12Struck by sea lion
- W56.12XAStruck by sea lion, initial encounter
- W56.12XDStruck by sea lion, subsequent encounter
- W56.12XSStruck by sea lion, sequela
- W56.19Other contact with sea lion
- W56.19XAOther contact with sea lion, initial encounter
- W56.19XDOther contact with sea lion, subsequent encounter
- W56.19XSOther contact with sea lion, sequela
- W56.2Contact with orca
- W56.21Bitten by orca
- W56.21XABitten by orca, initial encounter
- W56.21XDBitten by orca, subsequent encounter
- W56.21XSBitten by orca, sequela
- W56.22Struck by orca
- W56.22XAStruck by orca, initial encounter
- W56.22XDStruck by orca, subsequent encounter
- W56.22XSStruck by orca, sequela
- W56.29Other contact with orca
- W56.29XAOther contact with orca, initial encounter
- W56.29XDOther contact with orca, subsequent encounter
- W56.29XSOther contact with orca, sequela
- W56.3Contact with other marine mammals
- W56.31Bitten by other marine mammals
- W56.31XABitten by other marine mammals, initial encounter
- W56.31XDBitten by other marine mammals, subsequent encounter
- W56.31XSBitten by other marine mammals, sequela
- W56.32Struck by other marine mammals
- W56.32XAStruck by other marine mammals, initial encounter
- W56.32XDStruck by other marine mammals, subsequent encounter
- W56.32XSStruck by other marine mammals, sequela
- W56.39Other contact with other marine mammals
- W56.39XAOther contact with other marine mammals, initial encounter
- W56.39XDOther contact with other marine mammals, subsequent encounter
- W56.39XSOther contact with other marine mammals, sequela
- W56.4Contact with shark
- W56.41Bitten by shark
- W56.41XABitten by shark, initial encounter
- W56.41XDBitten by shark, subsequent encounter
- W56.41XSBitten by shark, sequela
- W56.42Struck by shark
- W56.42XAStruck by shark, initial encounter
- W56.42XDStruck by shark, subsequent encounter
- W56.42XSStruck by shark, sequela
- W56.49Other contact with shark
- W56.49XAOther contact with shark, initial encounter
- W56.49XDOther contact with shark, subsequent encounter
- W56.49XSOther contact with shark, sequela
- W56.5Contact with other fish
- W56.51Bitten by other fish
- W56.51XABitten by other fish, initial encounter
- W56.51XDBitten by other fish, subsequent encounter
- W56.51XSBitten by other fish, sequela
- W56.52Struck by other fish
- W56.52XAStruck by other fish, initial encounter
- W56.52XDStruck by other fish, subsequent encounter
- W56.52XSStruck by other fish, sequela
- W56.59Other contact with other fish
- W56.59XAOther contact with other fish, initial encounter
- W56.59XDOther contact with other fish, subsequent encounter
- W56.59XSOther contact with other fish, sequela
- W56.8Contact with other nonvenomous marine animals
- W56.81Bitten by other nonvenomous marine animals
- W56.81XABitten by other nonvenomous marine animals, initial encounter
- W56.81XDBitten by other nonvenomous marine animals, subsequent encounter
- W56.81XSBitten by other nonvenomous marine animals, sequela
- W56.82Struck by other nonvenomous marine animals
- W56.82XAStruck by other nonvenomous marine animals, initial encounter
- W56.82XDStruck by other nonvenomous marine animals, subsequent encounter
- W56.82XSStruck by other nonvenomous marine animals, sequela
- W56.89Other contact with other nonvenomous marine animals
- W56.89XAOther contact with other nonvenomous marine animals, initial encounter
- W56.89XDOther contact with other nonvenomous marine animals, subsequent encounter
- W56.89XSOther contact with other nonvenomous marine animals, sequela
W56 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to W56
Notes on these codes point to W56.
- W55 Excludes1: contact with marine mammals (W56.-)
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.