Medicaid Applications Spike during Marketplace Open Enrollment: Lessons from Covered California

The expansion of Medicaid coverage as part of the Affordable Care Act has insured millions of Americans and reduced costly churn in the program. A large increase in Medicaid applications during Marketplace open enrollment would indicate two potential information gaps: 1) individuals do not know that they are eligible, and/or 2) individuals do not know that they can enroll in Medicaid year-round. We used statewide monthly Medicaid applications data for California over a three-year period (July 2016 to June 2019) to assess whether Marketplace open enrollment influences Medicaid applications. Over one-third of all Medicaid applications (35.0%) were received during months with Marketplace open enrollment, and daily average Medicaid application volume was 32.5% higher in those months than in months outside of open enrollment. These findings generate concerns about whether there is enough consumer education and outreach to potential enrollees to limit coverage gaps and associated barriers in access to care.