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Prescription drug pricing standard means any methodology or formula for varying the pricing of a drug or drugs during the term of a pharmacy reimbursement contract that is based on the cost of a drug, which includes, but is not limited to, drug pricing references and amounts based on any of the following:
(1) Average wholesale price.
(2) Wholesale acquisition cost.
(3) Average manufacturer price.
(4) Average sales price.
(5) Maximum allowable cost.
(6) Other cost, whether publicly available or not.
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