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  6. 2024 ICD-10-CM Code W31

2024 ICD-10-CM Diagnosis Code W31

Contact with other and unspecified machinery

ICD-10-CM Code:
W31
ICD-10 Code for:
Contact with other and unspecified machinery
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • External causes of morbidity and mortality
    (V01–Y99)
    • Exposure to inanimate mechanical forces
      (W20-W49)
      • Contact with other and unspecified machinery
        (W31)

W31 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 and unspecified machinery. 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.

Unspecified diagnosis codes like W31 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding Applicable to Contact with other and unspecified machinery

Non-specific codes like W31 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 and unspecified machinery:

  • W31.0 for Contact with mining and earth-drilling machinery - NON-BILLABLE CODE

  • W31.1 for Contact with metalworking machines - NON-BILLABLE CODE

  • W31.2 for Contact with powered woodworking and forming machines - NON-BILLABLE CODE

  • W31.3 for Contact with prime movers - NON-BILLABLE CODE

  • W31.8 for Contact with other specified machinery - NON-BILLABLE CODE

  • W31.81 for Contact with recreational machinery - NON-BILLABLE CODE

  • W31.82 for Contact with other commercial machinery - NON-BILLABLE CODE

  • W31.83 for Contact with special construction vehicle in stationary use - NON-BILLABLE CODE

  • W31.89 for Contact with other specified machinery - NON-BILLABLE CODE

  • W31.9 for Contact with unspecified machinery - 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.


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.
  • contact with agricultural machinery W30
  • contact with machinery in transport under own power or being towed by a vehicle V01 V99
  • exposure to electric current W86

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 W31

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.