Managed care: what to expect as Medicare-HMO enrollment grows. 1.

Managed care is restructuring the American health care system and is beginning to make inroads into the Medicare-eligible population. Advantages of managed care for older patients include an emphasis on prevention, more flexibility in care delivery, and fewer restrictions and wider coverage (eg, prescriptions) than Medicare fee-for-service, and opportunities to develop measures for quality of care. Disadvantages include limitations on access and choice and a potential for professional conflict of interest. Early managed care enrollment favors the healthy "young-old;" questions remain about whether HMOs can provide quality care to the frail elderly with complicated and expensive health care needs.