title: Managed care and open-heart surgery facilities in California.
abstract: More than 25 percent of hospitals in California that offer open-heart surgery performed fewer than the number recommended by minimum volume guidelines in 1991. This DataWatch examines the characteristics of these hospitals and the patients they treat. The analysis suggests that the market share of these providers has remained constant over recent years, despite substantial growth in managed care. Simple explanations--for example, that these hospitals are serving isolated geographic markets or are hospitals in transition--do not explain the phenomenon. Medicare beneficiaries represent approximately half of the patient volume at these facilities. Health maintenance organizations (HMOs) are more likely to send their enrollees to high-volume facilities.
authors.affiliation: Department of Health Management and Policy, University of Michigan, Ann Arbor, USA.
authors.forename: M
authors.initials: M
authors.lastname: Chernew
authors.forename: R
authors.initials: R
authors.lastname: Hayward
authors.forename: D
authors.initials: D
authors.lastname: Scanlon
mesh_terms: D002140:California; D016507:Cardiology Service, Hospital / Q000592:standards / Q000706:statistics & numerical data; D001026:Coronary Artery Bypass / Q000191:economics / Q000706:statistics & numerical data*; D003362:Cost-Benefit Analysis; D006276:Health Facility Size / Q000706:statistics & numerical data; D006279:Health Maintenance Organizations / Q000191:economics*; D006287:Health Planning Guidelines; D006302:Health Services Research; D006801:Humans; D010067:Ownership / Q000706:statistics & numerical data; D013503:Surgery Department, Hospital / Q000592:standards* / Q000706:statistics & numerical data; D014600:Utilization Review