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MOI Medical Terminology
Updated March 2026

Mechanism of Injury (MOI)

Definition

The specific physical force, movement, or exposure that caused the industrial injury, such as lifting, twisting, falling, or repetitive motion. The mechanism of injury is documented in the medical-legal report and is essential for establishing causation between the work activity and the diagnosed condition.

Related Terms

Frequently Asked Questions

What is a Mechanism of Injury (MOI)?

The specific physical force, movement, or exposure that caused the industrial injury, such as lifting, twisting, falling, or repetitive motion. The mechanism of injury is documented in the medical-legal report and is essential for establishing causation between the work activity and the diagnosed condition.

Why is mechanism of injury important in workers' compensation?

Mechanism of Injury is a key medical concept in workers' compensation evaluations. Understanding this term helps physicians document findings accurately and helps attorneys and adjusters evaluate the medical aspects of a claim.