Concentration of Physician Services across Insurers and Effects on Quality: Early Evidence from Medicare Advantage

Medicine & Life Sciences

• Medicare Part C 100%
• Insurance Carriers 81%
• Physicians 40%
• Medicare 15%
• Centers for Medicare and Medicaid Services (U.S.) 12%
• Contracts 11%
• Quality of Health Care 8%
• Information Storage and Retrieval 4%
• Research Design 3%
• Datasets 3%
• Regression Analysis 3%

Social Sciences

• physician services 90%
• physician 41%
• evidence 26%
• Quality of care 19%
• research planning 7%
• regression analysis 7%
• rating 6%