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ICD-10-CM 2027 diagnosis code

W31.8Contact with other specified machinery

Not billable — use a more specific codeRequires 7th character

W31.8 is a header code, so it can't be reported by itself. Choose one of the 4 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 W31.8

W31.8 is the ICD-10-CM diagnosis code for contact with other specified machinery. It belongs to category W31 (contact with other and unspecified machinery), block W20-W49 (exposure to inanimate 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 4 subcodes must be used instead.

Within W31, choose W31.8 (other specified machinery) only when documentation doesn't support a more specific option: mining and earth-drilling machinery (W31.0), metalworking machines (W31.1), powered woodworking and forming machines (W31.2), prime movers (W31.3) and unspecified machinery (W31.9).

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 W31

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to W31.8.

› From W31 Contact with other and unspecified machinery
Excludes1
  • 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)

Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.

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 W31.8

Is W31.8 billable?

No. W31.8 is a header code. Report one of its more specific subcodes instead.