With more states moving people with disabilities and complex care needs into managed care, it is important to target beneficiaries for additional anticipated support before specific needs arise. In a survey of 1,521 seniors and people with disabilities in California who moved into Medicaid managed care six-16 months previously, the majority reported neutral or positive experiences with managed care continuity, access, and quality, compared with fee-for-service. Beneficiaries most likely to have negative experiences included those with poor self-rated health, functional impairment, cognitive impairment, frequent ED visits, and claims for back / osteoarthritis and cancer. Those with no specialty visits and those who had been continuously enrolled in Medicaid longer term before the transition also were more likely to report negative experiences. These populations can be targeted for assistance by health plans and Medicaid agencies. More specialty visits and longer time in Medicaid managed care also seems to improve beneficiaries' experiences.