2026 ICD-10-CM Diagnosis Code W56Contact with nonvenomous marine animal

ICD-10-CM Codes›V01–Y99›W50-W64›W56

ICD-10-CM W56
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

W56 is a non-billable ICD-10-CM category code for contact with nonvenomous marine animal, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W56.01XA, W56.01XD, W56.01XS, and W56.02XA.

Code Identity

ICD-10-CM Code
W56
Billable Status
No — Non-Billable Category
Code Describes
Contact with nonvenomous marine animal
Chapter
W50-W64
Exposure to animate mechanical forces

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionW50-W64Exposure to animate mechanical forces
CategoryW56Contact with nonvenomous marine animal
This CodeW56Contact with nonvenomous marine animal

Specific Coding for Contact with nonvenomous marine animalOverview

Non-specific codes like W56 require more characters. Use one of these billable codes instead:

  • W56.0 for Contact with dolphin

  • W56.01 for Bitten by dolphin

  • W56.02 for Struck by dolphin

  • W56.09 for Other contact with dolphin

  • W56.1 for Contact with sea lion

  • W56.11 for Bitten by sea lion

  • W56.12 for Struck by sea lion

  • W56.19 for Other contact with sea lion

  • W56.2 for Contact with orca

  • W56.21 for Bitten by orca

  • W56.22 for Struck by orca

  • W56.29 for Other contact with orca

  • W56.3 for Contact with other marine mammals

  • W56.31 for Bitten by other marine mammals

  • W56.32 for Struck by other marine mammals

  • W56.39 for Other contact with other marine mammals

  • W56.4 for Contact with shark

  • W56.41 for Bitten by shark

  • W56.42 for Struck by shark

  • W56.49 for Other contact with shark

  • W56.5 for Contact with other fish

  • W56.51 for Bitten by other fish

  • W56.52 for Struck by other fish

  • W56.59 for Other contact with other fish

  • W56.8 for Contact with other nonvenomous marine animals

  • W56.81 for Bitten by other nonvenomous marine animals

  • W56.82 for Struck by other nonvenomous marine animals

  • W56.89 for Other contact with other nonvenomous marine animals

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • contact with venomous marine animal T63

7th Character Note

  • The appropriate 7th character is to be added to each code from category W56

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About W56Overview

Is W56 (Contact with nonvenomous marine animal) a billable code?

No. This is a category header that groups the codes for contact with nonvenomous marine animal, and headers cannot be submitted on claims. Claims for contact with nonvenomous marine animal need a more specific code from this category, such as W56.01XA, W56.01XD, and W56.01XS.