W31.9XXS is the authoritative medical code for Contact with unspecified machinery, sequela. This classification is used in medical billing and clinical recording to specify the clinical criteria for contact with unspecified machinery, sequela (ICD-10-CM W31.9XXS), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Contact with unspecified machinery, sequela is a billable ICD-10-CM diagnosis code W31.9S. Inclusion terms: Contact with machinery NOS. Excludes1 (not coded here): 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; assault X92-Y09; contact or collision with animals or persons W50-W64; exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-); intentional self-harm X71-X83. 7th character: The appropriate 7th character is to be added to each code from category W31.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for W31.9XXS in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Contact with machinery NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- 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
- assault X92-Y09
- contact or collision with animals or persons W50-W64
- exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
- intentional self-harm X71-X83
Frequently Asked Questions (FAQ) & Clinical Guidance
Does W31.9XXS require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category W31.
What can't be coded together with W31.9XXS?
Per official ICD-10-CM Excludes1 instructions, W31.9XXS must not be reported together with: 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); assault (X92-Y09).
What conditions are included under W31.9XXS?
Contact with unspecified machinery, sequela includes: Contact with machinery NOS.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to W31.9XXS in its code family, with their registry titles.
- W31 — Contact with other and unspecified machinery
- W31.0 — Contact with mining and earth-drilling machinery
- W31.0XXA — Contact with mining and earth-drilling machinery, initial encounter
- W31.0XXD — Contact with mining and earth-drilling machinery, subsequent encounter
- W31.0XXS — Contact with mining and earth-drilling machinery, sequela
- W31.1 — Contact with metalworking machines
- W31.1XXA — Contact with metalworking machines, initial encounter
- W31.1XXD — Contact with metalworking machines, subsequent encounter
- W31.1XXS — Contact with metalworking machines, sequela
- W31.2 — Contact with powered woodworking and forming machines
View all 37 codes in the W31 family