2026 ICD-10-CM Diagnosis Code W31Contact with other and unspecified machinery
W31 is a non-billable ICD-10-CM category code for contact with other and unspecified machinery, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W31.0XXA, W31.0XXD, W31.0XXS, and W31.1XXA.
Code Identity
Code Classification
Specific Coding for Contact with other and unspecified machineryOverview
Non-specific codes like W31 require more characters. Use one of these billable codes instead:
W31.0 for Contact with mining and earth-drilling machinery
W31.1 for Contact with metalworking machines
W31.2 for Contact with powered woodworking and forming machines
W31.3 for Contact with prime movers
W31.8 for Contact with other specified machinery
W31.81 for Contact with recreational machinery
W31.82 for Contact with other commercial machinery
W31.83 for Contact with special construction vehicle in stationary use
W31.89 for Contact with other specified machinery
W31.9 for Contact with unspecified machinery
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- 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
- The appropriate 7th character is to be added to each code from category W31
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
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.
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.
Indicates that a seventh character is to be assigned to codes in a subcategory.
Code HistoryHistory
Questions About W31Overview
Is W31 (Contact with other and unspecified machinery) a billable code?
No. This is a category header that groups the codes for contact with other and unspecified machinery, and headers cannot be submitted on claims. Claims for contact with other and unspecified machinery need a more specific code from this category, such as W31.0XXA, W31.0XXD, and W31.0XXS.
