Loss of Motion Segment Integrity (LOMSI)
Definition
A clinical finding in the AMA Guides DRE spinal impairment method indicating instability or abnormal motion at a vertebral segment, typically from fracture, dislocation, or surgical fusion. LOMSI places the patient in at least DRE Category IV and significantly increases the impairment rating.
Key Facts About LOMSI in 2026
QME Physicians in CA
~2,500
Evaluation Fee Range
$2,500-$4,000
Report Deadline
30 days
Avg AI-Assisted Turnaround
14 days
Related Terms
Frequently Asked Questions
What is a Loss of Motion Segment Integrity (LOMSI)?
A clinical finding in the AMA Guides DRE spinal impairment method indicating instability or abnormal motion at a vertebral segment, typically from fracture, dislocation, or surgical fusion. LOMSI places the patient in at least DRE Category IV and significantly increases the impairment rating.
How is loss of motion segment integrity calculated in California?
Loss of Motion Segment Integrity in California workers' compensation is typically determined using the AMA Guides to the Evaluation of Permanent Impairment, 5th Edition (2001). QME and AME physicians use standardized rating methods to ensure consistency across evaluations.