1. Short title This Act may be cited as the Pharmacy Benefit Manager Transparency Act of 2023 . 2. Prohibition on unfair or deceptive prescription drug pricing practices (a) Conduct prohibited Except as provided in subsection (b), it shall be unlawful for any pharmacy benefit manager (or affiliate, subsidiary, or agent of a pharmacy benefit manager), directly or indirectly, to engage in any of the following activities related to pharmacy benefit management services: (1) Charge a health plan or payer a different amount for a prescription drug’s ingredient cost or dispensing fee than the amount the pharmacy benefit manager reimburses a pharmacy for the prescription drug’s ingredient cost or dispensing fee where the pharmacy benefit manager retains the amount of any such difference. (2) Arbitrarily, unfairly, or deceptively, by contract or any other means, reduce, rescind, or otherwise claw back any reimbursement payment, in whole or in part, to a pharmacist or pharmacy for a prescription drug's ingredient cost or dispensing fee, unless— (A) the original claim was submitted fraudulently; (B) the original claim payment was inconsistent with the reimbursement terms in the contract