I am not contracted with any insurance plans, because they do not pay for prolonged visits that I need for doing Functional Medicine consultations (not the same as primary care). 15-minute mass-production visits do not work for Functional Medicine.
However, I can provide an insurance Routing Slip on request for office visits, which you can submit to private insurance plans if they cover Out-of-Network reimbursement (although these are not eligible by law for Medicare coverage). Most Out-of-Network labs can also provide you a lab Routing Slip on request after a test has been done, which you can submit to private insurance plans to request lab-test reimbursement (at insurance company discretion).
(Nutritional and non-prescription supplements are not eligible for insurance coverage, because they are considered "food expenses".)