title: Dramatic rise in national growth of HMOs.
abstract: Studies show that HMOs have been able to lower hospital utilization rates and are introducing new elements of competition into the health care system.
mesh_terms: D003695:Delivery of Health Care / Q000458:organization & administration; D006279:Health Maintenance Organizations / Q000458:organization & administration / Q000639:trends*; D006761:Hospitals / Q000706:statistics & numerical data; D014481:United States