Notice 2020-66 provides guidance addressing whether certain Medicaid coverage of COVID-19 testing and diagnostic services is minimum essential coverage for purposes of the premium tax credit under section 36B of the Code.  This notice also announces that the Treasury Department and the IRS intend to amend § 1.5000A-2 of the Income Tax Regulations to add Medicaid coverage of COVID-19 testing and diagnostic services to the list of health care coverage that is not minimum essential coverage under a government-sponsored program.