Why are you assembling a list of what health plans different doctors take? That sounds like a spamhaus scraping the real world for leads.
Every health care provider in America will tell you the same thing: "Call your insurance company to verify coverage." Every insurance company in America will tell you, "Call us to verify coverage."
Nobody outside of the patient, the doctor, and the payor (insurance company) has a need to know those things. Your "AI agent" certainly does not.