W31.1XXS – Contact with metalworking machines, sequela

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

Billable code

ICD-10-CM code W31.1XXS

Code: W31.1XXS (claims format: W311XXS)
Description: Contact with metalworking machines, 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 › W31.1

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

W31.1 – Contact with metalworking machines

Applicable to:

Contact with abrasive wheel
Contact with forging machine
Contact with lathe
Contact with mechanical shears
Contact with metal drilling machine
Contact with milling machine
Contact with power press
Contact with rolling-mill
Contact with metal sawing machine

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 W31.1

Frequently asked questions

What is ICD-10 code W31.1XXS?

W31.1XXS is the ICD-10-CM code for contact with metalworking machines, sequela, in the block W20-W49 (Exposure to inanimate mechanical forces).

Is W31.1XXS a billable code?

Yes. W31.1XXS is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does W31.1XXS 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.