I went through Bethlehem health bureau. I first tried the Allentown health bureau and all the time slots were filled up before I could get in so got the Bethlehem info from my doctor friend. I also included a copy of the front and back of my health insurance card It’s free but they’ll bill my insurance.
https://www.bethlehem-pa.gov/Health-Bureau/Communicable-Diseases/COVID-19?fbclid=IwAR0iiZzcYiHN_o0j2M_2tYV_FYGyJtPJodHDodjyj1E3rXdvkHqZ_bsBr7g