Medicare : many HMOs experience high rates of beneficiary disenrollment : report to the Special Committee on Aging, U.S. Senate / United States General Accounting Office.
- Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 
43 p. :
- Managed care plans (Medical care) -- United States -- Statistics.
Health maintenance organizations -- United States -- Statistics.
Medicare -- Statistics.
- Medical subjects:
- Managed Care Programs -- United States
Health Maintenance Organizations -- United States