Resources

A curated collection of authoritative impairment, causation, and disability
evaluation resources. These references support physicians, raters, attorneys,
adjusters, and employers working with the AMA Guides and related standards.
Listings are provided for informational purposes; inclusion does not imply
endorsement.

Partner Resources

Causation evaluation resources developed under the guidance of
Christopher R. Brigham, MD, and colleagues.

• Causation.com
  — A purpose-built platform for structured causation review, offering
  AI-supported tools (CausationScreen™ and CausationEvidence™) that help
  qualified professionals organize, review, and interpret event, exposure,
  and diagnosis relationships. Grounded in the Bradford Hill considerations
  and the AMA Guides tradition, it supports claims, legal, and medical
  workflows while leaving final judgment with the reviewer.
• OpenCausation.org
  — A free, noncommercial educational resource presenting a structured,
  evidence-based methodology for evaluating medical causation. Covers the
  fundamentals, the AMA/NIOSH/ACOEM six-step method, the Bradford Hill
  considerations, legal standards, and worked examples — built to be
  transparent, reproducible, and readable by anyone.

Standards & Guides Publishers

• American Medical Association — AMA Guides
  — Publisher of the AMA Guides to the Evaluation of Permanent Impairment,
  the standard used by more than 40 U.S. states and several countries.
• ACOEM
  — American College of Occupational and Environmental Medicine; practice
  guidelines and occupational medicine resources.

U.S. Government & Regulatory

• U.S. DOL — Office of Workers’ Compensation Programs (OWCP)
  — Administers federal workers’ compensation, including FECA and Longshore.
• Social Security Administration — Disability Evaluation (“Blue Book”)
  — Medical criteria for evaluating disability claims.
• U.S. Department of Veterans Affairs — Schedule for Rating Disabilities (VASRD)
  — The rating schedule used for veterans’ disability compensation.

Professional Associations & Certification

• American Academy of Disability Evaluating Physicians (AADEP)
• American Board of Independent Medical Examiners (ABIME)
  — Home of the Certified Independent Medical Examiner (CIME) credential.
• American Academy of Orthopaedic Surgeons (AAOS)

Research & Data

• Workers Compensation Research Institute (WCRI)
  — Independent, nonpartisan research on workers’ compensation systems.
• NCCI
  — National Council on Compensation Insurance; rating and statistical data.

International Resources

Impairment and disability evaluation systems in other English-speaking
jurisdictions. Many adapt or reference the AMA Guides.

Australia

• State Insurance Regulatory Authority (SIRA), NSW
  — Publishes the NSW Workers Compensation Guidelines for the Evaluation of
  Permanent Impairment, the template guideline adapted by other Australian
  jurisdictions.
• Comcare
  — Australia’s federal work health and safety and workers’ compensation authority.
• Safe Work Australia
  — Publishes the Comparison of Workers’ Compensation Arrangements in
  Australia and New Zealand.

New Zealand

• Accident Compensation Corporation (ACC)
  — New Zealand’s no-fault injury scheme; uses the AMA Guides with the ACC
  User Handbook to rate whole-person impairment for lump-sum and independence
  allowance entitlements.

Canada

• Workplace Safety and Insurance Board of Ontario (WSIB)
  — Uses the Ontario Rating Schedule to determine non-economic loss (NEL) awards.
• Association of Workers’ Compensation Boards of Canada (AWCBC)
  — Umbrella organization for Canada’s provincial and territorial boards.

United Kingdom

• GOV.UK — Industrial Injuries Disablement Benefit
  — Technical guidance on the UK “loss of faculty” disablement assessment scheme.
• Industrial Injuries Advisory Council (IIAC)
  — Independent scientific body advising on prescribed occupational diseases.

Cross-Border Standards

• WHO — International Classification of Functioning, Disability and Health (ICF)
  — The World Health Organization’s framework for describing functioning and disability.