In the context of medical billing, a participating physician who accepts assignment means they agree to accept the Medicare-approved amount as full payment for covered services. The patient’s financial liability or out-of-pocket expense typically includes the deductible, coinsurance, and any services not covered by Medicare. Considering no further details are provided, $200.00 appears to be the most reasonable estimation for the total out-of-pocket expenses, as it commonly includes both deductible and coinsurance amounts for typical medical services.