Abstract
To test whether enrolling in traditional Medicare (TM) or Medicare Advantage (MA) at age 65 reduces mental healthcare utilization among individuals with mental health symptoms and low or moderate family incomes. We employ a fuzzy regression discontinuity design, comparing the likelihood of having an outpatient mental health visit or a psychotropic drug fill among individuals younger than or older than the age 65 Medicare eligibility threshold. We analyze 2014-2021 Medical Expenditure Panel Survey data. Our primary sample is restricted to individuals with probable mental health symptoms as indicated by their score on the Kessler K6 psychological distress scale (K6) and Patient Health Questionnaire-2 instrument (PHQ-2) and who have incomes less than 400% of the federal poverty level. Among individuals with probable mental health symptoms and low or moderate incomes, enrolling in Medicare (combining the effect of MA and TM) is associated with a 24.9 percentage point reduction (95% CI -49.1 to -0.8; p = 0.043) in the likelihood of having any type of outpatient mental health visit and a 31.3 percentage point reduction (95% CI -54.2 to -8.4; p = 0.008) in the likelihood of having a prescription drug fill for a psychotropic drug. Effects of MA and TM on mental healthcare utilization are not statistically different from each other. We observe no impact of enrolling in Medicare on the likelihood of having a visit to a primary care provider, having a visit to a non-mental healthcare specialist, or having a fill for a prescribed non-psychotropic drug. Enrolling in Medicare is associated with a reduction in the use of mental healthcare among individuals with probable mental health symptoms and low or moderate family incomes. Our findings suggest that the program poses access barriers specific to mental healthcare.
Published Version
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