OPPS begins with shaky start and mixed reviews.
D000368:Aged; D014487:Centers for Medicare and Medicaid Services, U.S.; D006801:Humans; D006278:Medicare / Q000331:legislation & jurisprudence; D010044:Outpatient Clinics, Hospital / Q000191:economics* / Q000331:legislation & jurisprudence; D011445:Prospective Payment System / Q000331:legislation & jurisprudence*; D012984:Software; D014481:United States