Impact of an all-or-nothing assignment requirement under Medicare
In an effort to raise assignment rates, some policymakers have considered dropping Medicare's case-by-case assignment option. Physicians would have to decide whether to accept all of their patients on assignment, or none of them. In a 1976 national survey, over two-thirds of the physicians stated they would take none of their patients on assignment if forced to choose. Simulation analysis showed that in that event, assignment rates nationwide would fall almost 10 percent. The mean supply of assigned visits would actually increase 11 percent for general practitioners, while decreasing 12-25 percent for general surgeons, internists, and obstetricians/gynecologists
Mitchell, J., & Cromwell, J. (1983). Impact of an all-or-nothing assignment requirement under Medicare. Health Care Financing Review, 4(4), 59-78.