Gaps in Medicare doctors' fees narrow: other disparities grow.
D003625:Data Collection; D004470:Economics, Medical; D005194:Family Practice / Q000191:economics / Q000639:trends; D005245:Fee Schedules / Q000191:economics; D005251:Fees, Medical / Q000706:statistics & numerical data / Q000639:trends*; D015442:Medicare Assignment / Q000706:statistics & numerical data / Q000639:trends*; D016345:Medicare Part B / Q000706:statistics & numerical data* / Q000639:trends; D008511:Medicine / Q000639:trends; D013038:Specialization; D014481:United States