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Physician Competition in the Era of Accountable Care Organizations.


ABSTRACT: OBJECTIVE:To calculate physician concentration levels for all U.S. markets using detailed data on integration and accountable care organization (ACO) participation. DATA SOURCE:2015 SK&A office-based physician survey linked to all commercial and public payer ACOs. STUDY DESIGN:We construct three separate Herfindahl-Hirschman Index (HHI) measures and plot their distributions. We then investigate how prevailing levels of concentration change when incorporating more detailed organizational features into the HHI measure. PRINCIPAL FINDINGS:Horizontal and vertical integration strongly influences measures of physician concentration; however, ACOs have limited impact overall. ACOs are often present in competitive markets, and only in a minority of these markets do ACOs substantively increase physician concentration. CONCLUSIONS:Monitoring ACO effects on physician competition will likely have to proceed on a case-by-case basis.

SUBMITTER: Richards MR 

PROVIDER: S-EPMC5867079 | biostudies-other | 2018 Apr

REPOSITORIES: biostudies-other

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Physician Competition in the Era of Accountable Care Organizations.

Richards Michael R MR   Smith Catherine T CT   Graves Amy J AJ   Buntin Melinda B MB   Resnick Matthew J MJ  

Health services research 20170327 2


<h4>Objective</h4>To calculate physician concentration levels for all U.S. markets using detailed data on integration and accountable care organization (ACO) participation.<h4>Data source</h4>2015 SK&A office-based physician survey linked to all commercial and public payer ACOs.<h4>Study design</h4>We construct three separate Herfindahl-Hirschman Index (HHI) measures and plot their distributions. We then investigate how prevailing levels of concentration change when incorporating more detailed o  ...[more]

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