Independent medical examinations (IMEs) are evaluations performed by an evaluator not involved in the care of the examinee, for clarifying clinical and case issues.  IMEs are an important component of workers' compensation systems, and are also used to clarify other disability or liability associated cases. Impairment evaluations are often used to provide a more objective understanding of the impact of an injury or illness.

Source: American Board of Independent Medical Examiners
http://www.abime.org