W31
ICD-10Non-billable categoryContact with other and unspecified machinery
Official ICD-10-CM descriptor (FY2026)
Contact with other and unspecified machinery
W31 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- 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
- The appropriate 7th character is to be added to each code from category W31
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under W31
- W31.0Contact with mining and earth-drilling machinerycategory
- W31.1Contact with metalworking machinescategory
- W31.2Contact with powered woodworking and forming machinescategory
- W31.3Contact with prime moverscategory
- W31.8Contact with other specified machinerycategory
- W31.9Contact with unspecified machinerycategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.