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ACA Marketplace Premiums and Competition Among Hospitals and Physician Practices
Journal Article

In this study published in the American Journal of Managed Care, the authors found that premiums for ACA Marketplace plans were higher in rating areas in which physician, hospital, and insurance markets were less competitive. An increase from the 10th to the 90th percentile of physician concentration and hospital concentration was associated with increases of $393 and $189, respectively, in annual premiums for the Silver plan with the second lowest cost. A similar increase in the number of insurers was associated with a $421 decrease in premiums. Physician–hospital integration was not significantly associated with premiums.

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