Maine Impairment Rating Guide
Maine workers' compensation uses the 4th Edition of the AMA Guides to the Evaluation of Permanent Impairment under 39-A M.R.S. § 153.
Which Edition?
AMA Guides Edition 4th Edition
Statutory Authority
39-A M.R.S. § 153
PPD Calculation
Statutory Maximum Weeks 520 weeks
PPI weeks = WPI% × 520 weeks (for injuries meeting threshold). Threshold varies by injury date.
Notes
AMA Guides 4th Edition is statutorily specified.
Frequently Asked Questions
Which edition of the AMA Guides does Maine use?
Maine uses the 4th Edition of the AMA Guides to the Evaluation of Permanent Impairment under 39-A M.R.S. § 153. The applicable edition is generally determined by the worker's date of injury; consult counsel for cases that straddle effective-date transitions.
How is permanent partial disability calculated in Maine?
PPI weeks = WPI% × 520 weeks (for injuries meeting threshold). Threshold varies by injury date.
Where can I find a certified impairment rater in Maine?
Browse our directory of certified impairment raters listed for Maine. View the directory →
Does this information constitute legal or medical advice?
No. This page provides general statutory and methodological information for educational purposes only. Statutes change, case law shifts controlling interpretation, and individual cases turn on facts beyond what reference material can capture. Consult qualified legal counsel and a credentialed rating physician for any specific matter.
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