Missouri Impairment Rating Guide
Missouri workers' compensation uses a state-specific permanent impairment schedule under Mo. Rev. Stat. § 287.190.
Which Edition?
AMA Guides Edition State-Specific Schedule
Statutory Authority
Mo. Rev. Stat. § 287.190(opens in a new tab)
PPD Calculation
Statutory Maximum Weeks 400 weeks
Scheduled injuries: statutory member weeks × percentage loss of use. Body-as-a-whole disabilities: percentage disability × 400 weeks. Permanent disability must be supported by physician-certified medical findings.
Notes
AMA Guides may be used by physicians as medical evidence, but Missouri law does not mandate the Fourth Edition or any other edition. The Commission determines permanent disability and is not bound by a physician's AMA impairment percentage. In 2005, proposed workers' compensation legislation would have required the AMA Guides Fifth Edition, but that provision was removed from the final enacted legislation.
Frequently Asked Questions
How does Missouri rate permanent impairment?
Missouri uses its own state-specific permanent impairment schedule under Mo. Rev. Stat. § 287.190 rather than mandating an AMA Guides edition. See the notes below for the controlling framework.
How is permanent partial disability calculated in Missouri?
Scheduled injuries: statutory member weeks × percentage loss of use. Body-as-a-whole disabilities: percentage disability × 400 weeks. Permanent disability must be supported by physician-certified medical findings.
Where can I find a certified impairment rater in Missouri?
Browse our directory of certified impairment raters listed for Missouri. 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.
List Your Practice in Missouri
No certified raters are listed in Missouri yet — be the first to join the directory.
Submit Your Information →