found some old info see below:
" Profession and monopoly, a book published in 1975 is critical of the AMA for limiting the supply of physicians and inflating the cost of medical care in the United States. The book claims that physician supply is kept low by the AMA to ensure high pay for practicing physicians. It states that in the United States the number, curriculum, and size of medical schools are restricted by state licensing boards controlled by representatives of state medical societies associated with the AMA. These claims ignore the fact that the total number of physicians in the United States increased by 142.3 percent between 1975 and 2008, from about 394,000 to 954,000. Physician workforce growth was much greater than national population growth during this period. As a result, the total number of physicians per 100,000 people in the United States climbed from 180 in 1975 to 314 in 2008 (Source - "Physicians Characteristics and Distribution in the US, 2010 Edition," pages 439, 441 and 451). The book is also critical of the ethical rules adopted by the AMA which restrict advertisement and other types of competition between professionals. It points out that advertising and bargaining can result in expulsion from the AMA and legal revocation of licenses. Restrictions against advertising that is not false or deceptive were dropped from the AMA Code of Medical Ethics in 1980 (See AMA Ethical Policy E-5.02). The book also states that before 1912 the AMA included uniform fees for specific medical procedures in its official code of ethics. The AMA's influence on hospital regulation was also criticized in the book.[28]