Impairment Rating
Legal basis: LC §4660.1
Definition
A standardized assessment of the degree of permanent functional loss resulting from an injury or illness, expressed as a WPI percentage using the AMA Guides 5th Edition. The impairment rating is distinct from the disability rating, which further adjusts for occupation, age, and earning capacity diminishment.
Key Facts About Impairment Rating 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 Impairment Rating?
A standardized assessment of the degree of permanent functional loss resulting from an injury or illness, expressed as a WPI percentage using the AMA Guides 5th Edition. The impairment rating is distinct from the disability rating, which further adjusts for occupation, age, and earning capacity diminishment.
What is the legal basis for Impairment Rating in California workers' compensation?
Impairment Rating is governed by LC §4660.1 under California workers' compensation law. This statute defines the requirements, procedures, and standards for impairment rating in the workers' compensation system as of 2026.
How is impairment rating calculated in California?
Impairment Rating 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.