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Number of ACA-related enrollments in the U.S. 2014-2021

Number of Affordable Care Act-related (ACA) enrollments in the Marketplace, Medicaid, and the Basic Health Program (BHP) in the U.S. from 2014 to 2021

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Release date

June 2021


United States

Survey time period


Supplementary notes

* Marketplace effectuated enrollment figures for 2014 and 2015 are as of 12/31/2014 and 3/31/2015 respectively, versus February coverage as of 3/15 for 2016-2021.
**Medicaid enrollment data, 2014-2020, are from the February monthly enrollment (ever enrolled during the month) for the expansion adult eligibility group, as reported by states through the Medicaid Budget and Expenditure System (MBES). 2021 Medicaid enrollment data are from December 2020 monthly enrollment, as this is the most recent available monthly enrollment count from MBES.
*** BHP programs did not start until 2015. BHP enrollment data are based on average monthly (for Minnesota) or quarterly (for New York) projected enrollment submitted by the states to CMS in advance of the applicable quarter and are rounded to the nearest thousand. BHP enrollment data for 2021 is through May 2021.

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