Worker Health Coverage Protection Act This bill provides health insurance premium assistance for individuals who become unemployed or are furloughed during or shortly after the coronavirus (i.e., the virus that causes COVID-19) public health emergency. Specifically, the bill treats premiums as paid for up to 15 months for individuals who (1) are terminated from employment and elect to continue insurance coverage through the COBRA (Consolidated Omnibus Budget Reconciliation Act) program or (2) receive a 20% or greater reduction in paid hours but remain eligible for coverage under a group health plan. Assistance is phased out based on adjusted gross income. The bill also specifies requirements for individuals changing, or enrolling in, health plans under the program. Additionally, the bill requires employers to provide eligible individuals specified written notice about the premium assistance program, including, among other information, available health plan enrollment options and the date that such assistance expires. The Department of the Treasury must reimburse employers, group health plans, and insurance issuers through a payroll tax credit or refund for unpaid premiums that were treated as paid under the program. Premium assistance is not considered income for federal income tax purposes.