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Nikpay SS, Richards MR, Penson D. Hospital-Physician Consolidation Accelerated In The Past Decade In Cardiology, Oncology. Health affairs (Project Hope). 2018 Jul;37(37). 1123-1127.
Abstract
Consolidation of physician practices by hospitals, or vertical integration, increased across all practice types in 2007-17. Rates of growth were highest among medical and surgical specialty practices and lowest among primary care practices. There was substantial variation within the specialties, ranging from 4 percentage points in dermatology to 34 percentage points in cardiology and oncology.