Medicaid managed care enrollees who are members of racial and ethnic minority groups have historically reported worse care experiences than White enrollees. Few recent studies have identified disparities within and between Medicaid managed care plans. Using 2014-18 data on 242,274 nonelderly Medicaid managed care enrollees in thirty-seven states, we examined racial and ethnic disparities in four patient experience metrics. Compared with White enrollees, minority enrollees reported significantly worse care experiences. Overall adjusted disparities for Black enrollees ranged between 1.5 and 4.5 percentage points; 1.6-3.9 percentage points for Hispanic or Latino enrollees; and 9.0-17.4 percentage points for Asian American, Native Hawaiian, or other Pacific Islander enrollees. Disparities were largely attributable to worse experiences by race or ethnicity within the same plan. For all outcomes, disparities were smaller in plans with the highest percentages of Hispanic or Latino enrollees, and for some outcomes, there were smaller disparities in plans with the highest percentages of Asian American, Native Hawaiian, or other Pacific Islander enrollees. Interventions to mitigate racial and ethnic inequities in care experiences include collection of comprehensive race and ethnicity data, adoption of health equity performance metrics, plan-level enrollee engagement, and multisectoral initiatives to dismantle structural racism.