Medicare changes.
D000776:Anesthesiology / Q000191:economics; D006801:Humans; D006278:Medicare / Q000331:legislation & jurisprudence*; D009719:Nurse Anesthetists / Q000191:economics; D011445:Prospective Payment System / Q000331:legislation & jurisprudence; D012956:Societies, Nursing; D014481:United States