Original Investigation

The California 2020 Medi-Cal Expansion to Young Adults and Coverage Among Noncitizens

JAMA Network Open 10.1001/jamanetworkopen.2026.12332

May 13, 2026 at 11:00 AM EDT

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What was the association of the California 2020 Medi-Cal expansion to young adults regardless of immigration status with the uninsured rate and coverage among noncitizens aged 19 to 25 years?This cross-sectional study of 19 773 California noncitizens aged 19 to 25 years found that the 2020 Medi-Cal expansion was associated with statistically significant increases in Medi-Cal coverage (4.2 percentage points) and any coverage of (3.5 percentage points), with no significant change in private insurance.These findings suggest that expansion was associated with significant gains in Medi-Cal coverage and any coverage.

Corresponding Author: Brandy J. Lipton, PhD, Department of Health, Society, and Behavior, University of California, Irvine, 856 Medical Sciences Quad, Irvine, CA 92697 (blipton@hs.uci.edu).

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