Medicare outpatient payment system undergoes change.
Young
Donna
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D000553:Ambulatory Care / Q000191:economics* / Q000639:trends; D016527:Drug Costs / Q000639:trends; D006308:Health Systems Plans / Q000191:economics / Q000639:trends; D006801:Humans; D006278:Medicare / Q000191:economics* / Q000639:trends; D014481:United States