Supplemental plans do not have a defined network. As long as they accept and bill Medicare.
Some Medicare plans have a defined network, while others allow you to use both the defined network as will as other Medicare providers.
Some plans require you to have a designated clinic and/or doctor, while other plans only allow in-network referrals.
My best advise is to call me and schedule an appointment.
That way we can discuss what best meets your health and network needs.
The 'golden rule' is that if Medicare billing is done, then its most likely covered. In most cases if a care facility does not do Medicare billing then you will pay 20% of medical costs.
Most Medicare policies allow you to be out-of-state for specified periods of time as long as you do not change your resident state.
Medicare only pays up to $10,000 for Emergence only medical care if your outside the US. You would have to pay out-of-pocket then submit the receipt to your Medicare plan for reimbursement.