DPC Frontier has a mapper with many, many practices on it along with prices, open date, and if it’s a “pure DPC” (i.e. no insurance) or hybrid (i.e. they also accept insurance for Medicare or other reasons). https://mapper.dpcfrontier.com/

Disclosure: I am the founder of Akute Health which makes software for DPC practices. https://www.akutehealth.com