Geographic differentials in a physician payment system: who needs them?
D005245:Fee Schedules; D005843:Geography; D007357:Insurance, Physician Services / Q000379:methods*; D007388:Internal Medicine / Q000191:economics*; D006278:Medicare; D011364:Professional Practice / Q000191:economics*; D011365:Professional Practice Location / Q000191:economics*; D014481:United States