provision during the years 1996 and 1998, but never since. These surveys were unique because they specifically inquired as to whether CAM was provided by a physician, among other types of professionals. This dissertation defines early integrative medicine (MDCAM) as CAM therapies provided by physicians. Because the MDCAM subpopulation is small, MEPS surveys for 1996 and 1998 were combined (N=39,314) to improve statistical power.The theoretical approach employed Abbott's (1988) theory of a system of professions, in which MDCAM represents a professional strategy of client differentiation through the social boundary mechanism of borrowing (Tilly, 2004) specific CAM therapies to satisfy consumer demand. The utility of the theory of a system of professions is discussed for its ability to decouple conceptual-level claims from observable workplace-level behaviors.Nearly one million Americans received CAM therapies from their physicians during the period, and this professional behavior was found in every region of the country. Services provided by physicians included spiritual healing, massage and acupuncture; national population prevalence estimates are provided. This is meaningful because physicians, at the time, were at risk for disciplinary action for providing CAM.