The changing health care environment.
D003363:Cost Control / Q000639:trends; D004465:Economic Competition / Q000639:trends; D005102:Health Expenditures / Q000639:trends*; D006279:Health Maintenance Organizations / Q000191:economics; D006801:Humans; D008484:Medicaid / Q000191:economics; D006278:Medicare / Q000191:economics; D010343:Patient Admission / Q000191:economics; D011243:Preferred Provider Organizations / Q000191:economics; D014481:United States