The AMA Guides to the Evaluation of Permanent Impairment, (AMA Guides) specifies that impairment evaluation may be conducted by a treating or nontreating physician. A treating physician who is knowledgeable about the use of the AMA Guides may be the appropriate professional to evaluate impairment, but in cases that involve pain, disability, and medicolegal (forensic) issues, a truly independent medical examiner typically is most appropriate. All specialties share the same elevated risk of iatrogenesis when treating and evaluating/forensic roles are mixed because mixing compromises the quality of care and threatens the viability of the therapeutic relationship. Further, all treating specialties share the same bias toward offering treatment for most complaints—rather than engaging in the type of cautious skepticism that is required for competent impairment evaluation and other forensic duties. Finally, no treating clinician, regardless of specialty, can offer allegiance to judicial and administrative decision-makers. Treating clinicians often find themselves in a position in which they would be cutting off a source of their own income if they were to offer opinions that the clinical presentation is not valid, work related, or injury related, nor is the patient in need of further treatment. Such a financial conflict of interest can be eliminated only by referral to independent examiners and restricting treating clinicians from becoming involved in such decisions.