Determinants of provider selection or assignment in a mandatory case management program and their implications for utilization.

Mandatory managed-care programs for Medicaid beneficiaries typically require enrollees to select the provider who will act as gatekeeper to the medical care system. A substantial number of beneficiaries, however, do not exercise this choice and are assigned a gatekeeper. Using consumer survey data from the Missouri Managed Health Care Project, we examined characteristics and use experiences of assignees compared with selectors. We found that the assignees enjoyed better health than the selectors and were less likely to have had a regular source of care prior to the program. The utilization experience was similar for both groups. We conclude that the basis for not making a choice is one of indifference.