HKS Authors

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Question: Was the implementation of behavioral health coinsurance parity in Medicare associated with outpatient behavioral health care use or spending among low-income beneficiaries with serious mental illness? Findings: In this cohort study of 793?275 Medicare beneficiaries, out-of-pocket costs for outpatient behavioral health care decreased among those with cost-sharing reductions, but behavioral health care use and spending were similar among beneficiaries with reductions in coinsurance for this care and beneficiaries with free care.


Newhouse, Joseph P. "Assessment of Behavioral Health Services Use among Low-Income Medicare Beneficiaries after Reductions in Coinsurance Fees." JAMA Network Open 3.10 (October 2020): e2019854-e2019854.