To the extent a health carrier has developed a closed or exclusive provider network as provided in subdivision (19) of section 376.426 through contractual arrangements with selected providers, such health carrier shall accept into such closed or exclusive network any willing licensed physician who agrees to accept a fee schedule, payment, or reimbursement rate that is fifteen percent less than the health carrier’s standard prevailing or market fee schedule, payment, or reimbursement rate for such network in the specific geography of the licensed physician’s practice.