By Brent D. Fulton | Published September 2017 in Health Affairs | Link to Full Article
This paper analyzes market concentration trends in the United States from 2010 to 2016 for hospitals, physician organizations, and health insurers, finding that hospital and physician organization markets became increasingly concentrated over this time period. Concentration among primary care physicians increased the most, partially because hospitals and health care systems acquired primary care physician organizations. The paper finds that a large number of Metropolitan Statistical Areas (MSAs) are highly concentrated – in 2016, reaching 91% for hospitals, 65% for specialist physicians, 39% for primary care physicians, and 57% for insurers. The paper concludes that public policies that enhance competition are needed, such as stricter enforcement of antitrust laws, reducing barriers to entry, and restricting anticompetitive behaviors.