ICD-10-CM 2027 diagnosis code

W56Contact with nonvenomous marine animal

Not billable — use a more specific code

W56 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About W56

W56 is the ICD-10-CM diagnosis code for contact with nonvenomous marine animal. It belongs to block W50-W64 (exposure to animate mechanical forces) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: W56.0 (dolphin), W56.1 (lion), W56.2 (orca), W56.3 (mammals), W56.4 (shark), W56.5 (fish) and W56.8 (animals).

Don't report W56 together with the conditions in its Excludes1 note: contact with venomous marine animal (T63.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under W56

Coding notes

Excludes1Not coded here — never report together with this code

contact with venomous marine animal (T63.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to W56.

Broader instructions also apply from W50-W64 Exposure to animate mechanical forces and Chapter 20: External causes of morbidity.

Codes whose notes reference W56

W55Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about W56

Is W56 billable?: No. W56 is a header code. Report one of its more specific subcodes instead.