Tennessee Code Title 56. Insurance § 56-7-3106

(a) Before a pharmacy benefits manager or covered entity may place a drug on a maximum allowable cost list, the pharmacy benefits manager or covered entity must find that the drug is generally available for purchase by pharmacies in this state from a national or regional wholesaler.

(b) If a drug that has been placed on a maximum allowable cost list no longer meets the requirements of subsection (a), the drug shall be removed from the maximum allowable cost list by the pharmacy benefits manager or covered entity within five (5) business days after the date that the pharmacy benefits manager or covered entity becomes aware that the drug no longer meets the requirements of subsection (a).

(c) Nothing in this part shall be construed as preventing a pharmacy benefits manager or covered entity from reimbursing claims for a generic drug at the previously determined maximum allowable cost even if the pharmacy benefits manager or covered entity reimburses for the equivalent brand name drug at the contracted brand rate after confirmation by a national or regional wholesaler and by the manufacturer that the generic drug is generally unavailable for purchase from a national or regional wholesaler.