The equalizer.
D004470:Economics, Medical; D005245:Fee Schedules / Q000331:legislation & jurisprudence*; D007357:Insurance, Physician Services / Q000331:legislation & jurisprudence*; D006278:Medicare / Q000331:legislation & jurisprudence*; D012051:Reimbursement Mechanisms / Q000331:legislation & jurisprudence; D013038:Specialization; D014481:United States