Recent policy actions and proposals in Medicaid have renewed focus on the problem of churn, or temporary loss of coverage in which enrollees disenroll and then re-enroll within a short period of time. We find that 10% of full-benefit enrollees have a gap in coverage of less than a year, and rates are higher for children and adults compared to aged and people with disabilities. Churn has implications for access to care as well as administrative costs faced by states.