Maryland Impairment Rating Guide
Maryland workers' compensation uses the 4th Edition of the AMA Guides to the Evaluation of Permanent Impairment under COMAR 14.09.09.01.
Which Edition?
AMA Guides Edition 4th Edition
Statutory Authority
COMAR 14.09.09.01(opens in a new tab)
PPD Calculation
Statutory Maximum Weeks 500 weeks
Whole-person ("other cases") awards are based on a 500-week maximum and compensated in proportion to the percentage of industrial loss. Maryland uses three statutory compensation tiers based on award duration: Tier 1 (<75 weeks), Tier 2 (75–249 weeks), and Tier 3 (250+ weeks, "serious disability"), with different weekly compensation rates applying to each tier.
Notes
Fourth Edition required, via incorporation by reference, in COMAR 14.09.09.01.
Frequently Asked Questions
Which edition of the AMA Guides does Maryland use?
Maryland uses the 4th Edition of the AMA Guides to the Evaluation of Permanent Impairment under COMAR 14.09.09.01. 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 Maryland?
Whole-person ("other cases") awards are based on a 500-week maximum and compensated in proportion to the percentage of industrial loss. Maryland uses three statutory compensation tiers based on award duration: Tier 1 (<75 weeks), Tier 2 (75–249 weeks), and Tier 3 (250+ weeks, "serious disability"), with different weekly compensation rates applying to each tier.
Where can I find a certified impairment rater in Maryland?
Browse our directory of certified impairment raters listed for Maryland. 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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