• Sungchul Park, David J Meyers, and Amal N Trivedi.
• Department of Health Policy and Management, College of Health Science, and L-HOPE Program for Community-Based Total Learning Health Systems, Korea University, Seoul, Korea (S.P.).
• Ann. Intern. Med. 2024 Jul 1; 177 (7): 882891882-891.

BackgroundCompared with traditional Medicare (TM), Medicare Advantage (MA) plans typically offer supplemental benefits and lower copayments for in-network services and must include an out-of-pocket spending limit.ObjectiveTo examine whether the financial burden of care decreased for persons switching from TM to MA (TM-to-MA switchers) relative to those remaining in TM (TM stayers).DesignRetrospective longitudinal cohort study comparing changes in financial outcomes between TM-to-MA switchers and TM stayers.SettingPopulation-based.Participants7054 TM stayers and 1544 TM-to-MA switchers from the Medical Expenditure Panel Survey, 2014 to 2021.MeasurementsIndividual health care costs (out-of-pocket spending and cost sharing), financial burden (high and catastrophic), and subjective financial hardship (difficulty paying medical bills, paying medical bills over time, and inability to pay medical bills).ResultsCompared with TM stayers, TM-to-MA switchers had small differences in out-of-pocket spending ($168 [95% CI, -$133 to $469]) and proportions of total health expenses paid out of pocket (cost sharing) (0.2 percentage point [CI, -1.3 to 1.7 percentage points]), families with out-of-pocket spending greater than 20% of their income (high financial burden) (0.3 percentage point [CI, -2.5 to 3.0 percentage points]), families reporting out-of-pocket spending greater than 40% of their income (catastrophic financial burden) (0.7 percentage point [CI, -0.1 to 1.6 percentage points]), families reporting paying medical bills over time (-0.2 percentage point [CI, -1.7 to 1.4 percentage points]), families having problems paying medical bills (-0.4 percentage point [CI, -2.7 to 1.8 percentage points]), and families reporting being unable to pay medical bills (0.4 percentage point [CI, -1.3 to 2.0 percentage points]).LimitationInability to account for all medical care and cost needs and variations across MA plans, small baseline differences in out-of-pocket spending, and potential residual confounding.ConclusionDifferences in financial outcomes between beneficiaries who switched from TM to MA and those who stayed with TM were small. Differences in financial burden ranged across outcomes and did not have a consistent pattern.Primary Funding SourceThe National Research Foundation of Korea.

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