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ICD-10-CM 2027 diagnosis code

W55.89Other contact with other mammals

Not billable — use a more specific codeRequires 7th character

W55.89 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

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 W55.89

W55.89 is the ICD-10-CM diagnosis code for other contact with other mammals. It belongs to category W55 (contact with other mammals), 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 3 subcodes must be used instead.

Within W55.8, choose W55.89 (Other contact with other mammals) only when documentation doesn't support a more specific option: Bitten by other mammals (W55.81) and struck by other mammals (W55.82).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

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

7th character

The appropriate 7th character is to be added to each code from category W55

Notes that apply from higher levels

Instructions written at a parent level also apply to W55.89.

› From W55 Contact with other mammals
Includes
  • contact with saliva, feces or urine of mammal
Excludes1
  • animal being ridden- see transport accidents
  • bitten or struck by dog (W54)
  • bitten or struck by rodent (W53.-)
  • contact with marine mammals (W56.-)

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

Alphabetic index entries

12 entries

Terms in the official ICD-10-CM index that lead to W55.89.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about W55.89

Is W55.89 billable?

No. W55.89 is a header code. Report one of its more specific subcodes instead.