Version 2024

2024 ICD-10-CM Diagnosis Code W55

Contact with other mammals

ICD-10-CM Code:
ICD-10 Code for:
Contact with other mammals
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • External causes of morbidity and mortality
    • Exposure to animate mechanical forces
      • Contact with other mammals

W55 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of contact with other mammals. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Contact with other mammals

Non-specific codes like W55 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for contact with other mammals:

  • W55.0 for Contact with cat - NON-BILLABLE CODE

  • W55.01 for Bitten by cat - NON-BILLABLE CODE

  • W55.03 for Scratched by cat - NON-BILLABLE CODE

  • W55.09 for Other contact with cat - NON-BILLABLE CODE

  • W55.1 for Contact with horse - NON-BILLABLE CODE

  • W55.11 for Bitten by horse - NON-BILLABLE CODE

  • W55.12 for Struck by horse - NON-BILLABLE CODE

  • W55.19 for Other contact with horse - NON-BILLABLE CODE

  • W55.2 for Contact with cow - NON-BILLABLE CODE

  • W55.21 for Bitten by cow - NON-BILLABLE CODE

  • W55.22 for Struck by cow - NON-BILLABLE CODE

  • W55.29 for Other contact with cow - NON-BILLABLE CODE

  • W55.3 for Contact with other hoof stock - NON-BILLABLE CODE

  • W55.31 for Bitten by other hoof stock - NON-BILLABLE CODE

  • W55.32 for Struck by other hoof stock - NON-BILLABLE CODE

  • W55.39 for Other contact with other hoof stock - NON-BILLABLE CODE

  • W55.4 for Contact with pig - NON-BILLABLE CODE

  • W55.41 for Bitten by pig - NON-BILLABLE CODE

  • W55.42 for Struck by pig - NON-BILLABLE CODE

  • W55.49 for Other contact with pig - NON-BILLABLE CODE

  • W55.5 for Contact with raccoon - NON-BILLABLE CODE

  • W55.51 for Bitten by raccoon - NON-BILLABLE CODE

  • W55.52 for Struck by raccoon - NON-BILLABLE CODE

  • W55.59 for Other contact with raccoon - NON-BILLABLE CODE

  • W55.8 for Contact with other mammals - NON-BILLABLE CODE

  • W55.81 for Bitten by other mammals - NON-BILLABLE CODE

  • W55.82 for Struck by other mammals - NON-BILLABLE CODE

  • W55.89 for Other contact with other mammals - NON-BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • contact with saliva, feces or urine of mammal

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • animal being ridden- see transport accidents
  • bitten or struck by dog W54
  • bitten or struck by rodent W53
  • contact with marine mammals W56

7th Character Note

7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • The appropriate 7th character is to be added to each code from category W55

7th Character

7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.