California has more Medicaid and CHIP enrollees than any other state in the United States. As of April 2023, approximately ** million Americans were enrolled in the Medicaid health insurance programs in California, which accounted for approximately ** percent of the total number of Medicaid enrollees nationwide (**** million).
Blow to Medicaid expansion plans
California is one of many states that has expanded its Medicaid program under the Affordable Care Act (ACA) to encourage more low-income adults to sign up for health coverage. One of the original aims of the ACA was to limit some of the variations in state Medicaid programs, but the Supreme Court ruled that the expansion should be optional. Governors of the states that did not expand said they were concerned about long-term costs. California is the leading state for Medicaid expenditure, spending approximately **** billion U.S. dollars in FY2020.
Health coverage for children
The Children’s Health Insurance Program (CHIP) was created as a complement to Medicaid, expanding the reach of government-funded health coverage to more children in low-income families. As of May 2021, over **** million children were enrolled in Medicaid/CHIP programs in California, more than any other state. As of January 2021, the median Medicaid/CHIP eligibility level for children was *** percent of the federal poverty level.
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CMS. (June 27, 2025). Total number of Medicaid and CHIP enrollees as of March 2025, by state [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 21, 2026, from /statistics/186979/people-enrolled-in-medicaid-by-state/
CMS. "Total number of Medicaid and CHIP enrollees as of March 2025, by state." Chart. June 27, 2025. ÌÇÐÄÆÆ½â°æ. Accessed July 21, 2026. /statistics/186979/people-enrolled-in-medicaid-by-state/
CMS. (2025). Total number of Medicaid and CHIP enrollees as of March 2025, by state. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 21, 2026. /statistics/186979/people-enrolled-in-medicaid-by-state/
CMS. "Total Number of Medicaid and Chip Enrollees as of March 2025, by State." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 27 Jun 2025, /statistics/186979/people-enrolled-in-medicaid-by-state/
CMS, Total number of Medicaid and CHIP enrollees as of March 2025, by state ÌÇÐÄÆÆ½â°æ, /statistics/186979/people-enrolled-in-medicaid-by-state/ (last visited July 21, 2026)
Total number of Medicaid and CHIP enrollees as of March 2025, by state [Graph], CMS, June 27, 2025. [Online]. Available: /statistics/186979/people-enrolled-in-medicaid-by-state/