Tennessee Code Title 56. Insurance § 56-7-3117

A covered entity or pharmacy benefits manager shall disclose to a pharmacy or pharmacist in its network, at least thirty (30) days before the date the change becomes effective, any material change to a contract provision that affects the terms of reimbursement, the process for verifying benefits and eligibility, the dispute resolution procedure, the procedure for verifying drugs included in the formulary, and the procedure for contract termination. Nothing in this section prohibits a covered entity or pharmacy benefits manager from taking action without notice against a pharmacy or pharmacist in its network for a fraudulent claim or service.