title: Managing care? Medicare managed care and patient use of cardiologists.
abstract: OBJECTIVE
  To examine the impact of Medicare managed care (MMC) versus Medicare fee for service (MFFS) on stent patients' use of physicians with lower resource use and better outcomes.
  
  
  METHODS
  Retrospective secondary data from 2003 through 2006 for 67,476 patients without acute myocardial infarction, staying 2 or more days in hospital, and treated by 486 physicians in Florida performing 10 or more cases per quarter.
  
  
  METHODS
  Analysis was at the patient level. Multivariate logistic models estimated the probability of an MMC patient using a physician with a particular risk-adjusted profile rank with respect to hospital peers.
  
  
  RESULTS
  No differences were found in usage of physicians with shorter admissions. Compared with MFFS, MMC patients were significantly less likely to use physicians whose average mortality was the lowest/lowest quartiles/below median among facility peers, and more likely to use a physician ranked below median on live discharges directly home (not needing home health care, skilled nursing care, or a subacute hospital convalescence). Similar results were found with emergency admissions, and where physicians both attended and treated.
  
  
  CONCLUSIONS
  Florida percutaneous coronary interventions patients insured by MMC used physicians with worse outcome profiles than those of MFFS patients. Results were not consistent with hospital care differences, physician-patient, or payor-physician selection, but they were consistent with selection of unobservably sicker members into MMC and concentration of MMC among physicians.
authors.affiliation: Fuqua School of Business, Duke University, and Department of Community & Family Medicine, Duke University School of Medicine, 1 Towerview Drive, Box 90127, Durham, NC 27708-0127, USA. m.huesch@duke.edu
authors.forename: Marco D
authors.initials: MD
authors.lastname: Huesch
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D002309:Cardiology / Q000592:standards*; D002983:Clinical Competence; D005431:Florida; D006801:Humans; D007902:Length of Stay; D016015:Logistic Models; D008329:Managed Care Programs / Q000458:organization & administration*; D008485:Medical Audit; D006278:Medicare / Q000458:organization & administration*; D017059:Models, Econometric; D015233:Models, Statistical; D017063:Outcome Assessment, Health Care; D010820:Physicians / Q000592:standards* / Q000706:statistics & numerical data*; D012051:Reimbursement Mechanisms; D012189:Retrospective Studies; D015607:Stents; D014481:United States