Thumb Butte Medical Center. April 23, 2020 ·. DRIVE-THROUGH COVID-19 TESTING NOW AVAILABLE. We are here doing everything we can for our community. We now have drive-through, rapid COVID-19 testing available 7 days a week from 7 a.m. to 5 p.m. at our Prescott location on Willow Creek Rd. We are here for you,.