Factors contributing to the phenomenal growth of medicare expense for hospital-based ambulatory care.
D000553:Ambulatory Care / Q000191:economics*; D007349:Insurance, Health, Reimbursement / Q000639:trends; D006278:Medicare / Q000706:statistics & numerical data*; D010044:Outpatient Clinics, Hospital / Q000191:economics*; D014481:United States