title: E&M coding levels for hospital EDs, 2007-10.
mesh_terms: D014487:Centers for Medicare and Medicaid Services, U.S.; D059019:Clinical Coding / Q000639:trends*; D004636:Emergency Service, Hospital / Q000191:economics; D007344:Insurance Claim Reporting / Q000592:standards; D011445:Prospective Payment System; D014481:United States