Specialists lose ground & generalists & group physicians gain.
D003625:Data Collection; D004470:Economics, Medical; D007182:Income / Q000706:statistics & numerical data*; D008511:Medicine / Q000706:statistics & numerical data; D010820:Physicians / Q000191:economics* / Q000706:statistics & numerical data; D010821:Physicians, Family / Q000191:economics / Q000706:statistics & numerical data; D013038:Specialization; D014481:United States