Tennessee Code Title 56. Insurance § 56-7-3121

(a) A pharmacy benefits manager shall allow patients, participants, and beneficiaries of the pharmacy benefits plans and programs that the pharmacy benefits manager serves to utilize any pharmacy within this state that is licensed to dispense the prescription pharmaceutical product that the patient, participant, or beneficiary seeks to fill, as long as the pharmacy is willing to accept the same terms and conditions that the pharmacy benefits manager has established for at least one (1) of the networks of pharmacies that the pharmacy benefits manager has established to serve patients, participants, and beneficiaries within this state.

(b) A pharmacy benefits manager may establish a preferred network of pharmacies and a non-preferred network of pharmacies. The pharmacy benefits manager shall not prohibit a pharmacy from participating in either type of network within this state as long as the pharmacy is licensed by this state and the federal government and willing to accept the same terms and conditions that the pharmacy benefits manager has established for other pharmacies participating within the network that the pharmacy wishes to join.

(c) A pharmacy benefits manager shall not charge a patient, participant, or beneficiary of a pharmacy benefits plan or program that the pharmacy benefits manager serves a different copayment obligation or additional fee, or provide any inducement or financial incentive, for using any pharmacy within a given network of pharmacies established by the pharmacy benefits manager to serve patients, participants, and beneficiaries within this state.