Independent medical examination and expert witness practice
What this domain tests
This domain tests the boundaries of the IME role and the reliability of expert opinions. The exam expects objectivity, informed consent, record review, examination limits, and testimony that stays within expertise.
Core rules and concepts
- An IME is generally a non-treating evaluation requested by a payer, employer, court, or attorney. The examiner should explain the purpose, scope, limits of confidentiality, and that no treatment relationship is created. Consent and privacy rules still apply.
- The IME physician should review relevant records before the examination, obtain a focused history, perform an appropriate examination, review imaging and tests, and distinguish subjective complaints from objective findings. Additional testing should be justified, not routine.
- Expert testimony must be based on sufficient facts, reliable methods, and a fit between the opinion and the case. The expert should identify the basis for each opinion, the records relied on, and the degree of certainty. Opinions should be stated to a reasonable degree of medical probability when that is the legal standard.
- The expert may not opine outside licensure, training, or experience. Legal conclusions such as the employer violated a statute are for the decision-maker. Medical opinions about diagnosis, causation, impairment, and work capacity are the expert's domain.
- Payment does not make an examiner biased, but undisclosed conflicts, advocacy language, and one-sided record review undermine credibility.
Worked example
An attorney asks an IME physician to evaluate a shoulder injury and to state that the employer caused a rotator cuff tear. The physician reviews prior imaging showing tendinopathy, examines the worker, and finds no acute cuff tear but some impingement. The report should explain the basis for the diagnosis, note the pre-existing tendinopathy, and give a qualified causation opinion rather than adopting the attorney's wording. If the records are insufficient, the physician should say so and request them.
Traps that cost marks
Becoming an advocate for the referring party; accepting a requested causation conclusion without analysis; failing to review prior records; performing unnecessary tests; declaring the evaluation independent without disclosing conflicts; and giving legal conclusions or opinions beyond expertise.