W31
Non-billableContact with other and unspecified machinery
Contact with other and unspecified machinery
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- 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)
- 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 Definitions
- A - initial encounter
- D - subsequent encounter
- S - sequela
Child Codes (6)
Also Known As / Clinical Terms
Frequently Asked Questions
What is ICD-10 code W31?
ICD-10-CM code W31 represents "Contact with other and unspecified machinery". It is a non-billable header code — use a more specific child code for billing purposes.
Is W31 a billable code?
No, W31 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 6 child codes under W31.
What chapter is W31 in?
W31 is in Chapter 21: External Causes of Morbidity (codes V00-Y99).
What codes cannot be used with W31?
W31 has Excludes1 notes indicating codes that cannot be used together with it, including: assault (X92-Y09); contact or collision with animals or persons (W50-W64); exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-); and 4 more.
What are the subcategories under W31?
W31 has 6 child codes, including: W31.0 (Contact with mining and earth-drilling machinery), W31.1 (Contact with metalworking machines), W31.2 (Contact with powered woodworking and forming machines), W31.3 (Contact with prime movers), and 2 more.
What are the UMLS CUIs for W31?
W31 is linked to 1 UMLS Concept Unique Identifier: C0479005. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.