W31.3XXS – Contact with prime movers, sequela

ICD-10-CM 2027 diagnosis code · Exposure to inanimate mechanical forces

Billable code

ICD-10-CM code W31.3XXS

Code: W31.3XXS (claims format: W313XXS)
Description: Contact with prime movers, sequela
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 20. External causes of morbidity (V00-Y99)
Block: W20-W49 Exposure to inanimate mechanical forces
Parent codes: W31 › W31.3

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

W31 – Contact with other and unspecified machinery

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)

7th character note:

The appropriate 7th character is to be added to each code from category W31

W31.3 – Contact with prime movers

Applicable to:

Contact with gas turbine
Contact with internal combustion engine
Contact with steam engine
Contact with water driven turbine

Block W20-W49

Excludes1 (not coded here):

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)

Related codes in W31.3

Frequently asked questions

What is ICD-10 code W31.3XXS?

W31.3XXS is the ICD-10-CM code for contact with prime movers, sequela, in the block W20-W49 (Exposure to inanimate mechanical forces).

Is W31.3XXS a billable code?

Yes. W31.3XXS is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does W31.3XXS belong to?

It belongs to category W31 – Contact with other and unspecified machinery.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.