Texas Impairment Rating Guide
Texas workers' compensation uses the 4th Edition of the AMA Guides to the Evaluation of Permanent Impairment under Tex. Lab. Code § 408.124.
Which Edition?
AMA Guides Edition 4th Edition
Statutory Authority
Tex. Lab. Code § 408.124(opens in a new tab)
PPD Calculation
Statutory Maximum Weeks 401 weeks
Impairment Income Benefits (IIBs) = 3 weeks per percentage point of WPI. 401-week statutory IIB cap.
Notes
Texas statute specifies AMA Guides 4th Edition. Texas is in process of reviewing a change to AMA Guides Sixth Edition 2025, but no final determination has yet been made.
Frequently Asked Questions
Which edition of the AMA Guides does Texas use?
Texas uses the 4th Edition of the AMA Guides to the Evaluation of Permanent Impairment under Tex. Lab. Code § 408.124. 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 Texas?
Impairment Income Benefits (IIBs) = 3 weeks per percentage point of WPI. 401-week statutory IIB cap.
Where can I find a certified impairment rater in Texas?
Browse our directory of certified impairment raters listed for Texas. 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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