Original Investigation

Medicaid Retention After Transition to Medicare Among Adults With Expansion Coverage

JAMA Network Open 10.1001/jamanetworkopen.2026.8560

April 22, 2026 at 11:00 AM EDT

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Among low-income adults with Medicaid expansion coverage, how often do they retain Medicaid after transitioning to Medicare, and is retention higher in states without the Medicare Savings Program (MSP) asset test?In this cohort study of 266 009 adults with Medicaid expansion coverage who entered Medicare in 2018, 37% lacked Medicaid coverage by the end of their first year of Medicare enrollment. Medicaid, but not MSP, coverage was higher in states that waived the MSP asset test than states that did not.The findings of this study suggest that waiving the MSP asset test could help beneficiaries retain Medicaid coverage when transitioning to Medicare, but many of them appear to miss opportunities to enroll in MSPs.

Corresponding Author: Zhiyou Yang, PhD, The Mongan Institute, Massachusetts General Hospital, 100 Cambridge St, Ste 1600, Boston, MA 02114 (zyang15@mgh.harvard.edu).

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