(1) "Acquisition cost" means the actual price paid by a provider for a drug.

(2) "Average manufacturer price (AMP)" means, with respect to a covered outpatient drug of a manufacturer for a rebate period, the average price paid to the manufacturer for the drug in the United States by wholesalers for drugs distributed to the retail pharmacy class of trade. The AMP is determined without regard to customary prompt pay discounts extended to wholesalers.

(3) "Best price" means with respect to a single source drug or innovator multiple source drug of a manufacturer (including the lowest price available to any entity for any such drug of a manufacturer that is sold under an approved new drug application) the lowest price available from the manufacturer during the rebate period to any wholesaler, retailer, provider, health maintenance organization, nonprofit entity, or governmental entity within the United States.

(4) "Estimated acquisition cost (EAC)" means the calculation of the provider's estimated cost of a drug for which no state maximum allowable cost (MAC) price has been determined. The EAC is the department's best estimate of what price providers are generally paying in the state for a drug in the package size providers buy most frequently. If actual wholesale cost is not available the EAC is 85% of average wholesale price.

(5) "Legend drugs" means drugs that federal law prohibits dispensing without a prescription.

(6) "Maintenance medications" means oral tablet or capsule drugs:

(a) that have a low probability for dosage or therapy changes due to side effects;

(b) are subject to serum drug concentration monitoring or therapeutic response of a course of prolonged therapy;

(c) whose most common use is to treat a chronic disease state. Therapy with the drug is not considered curative or promoting of recover; and

(d) the drug is administered continuously rather than intermittently.

(7) "Multi-source" means a drug product sold under its generic name whose active ingredients are identical in chemical composition to one or more others sold under trademark that can be purchased from different manufacturers or distributors.

(8) " State maximum allowable cost (SMAC)" means the per unit amount the department reimburses a provider for a prescription drug included in the state maximum allowable cost program. SMAC is the upper limit the department will pay for multi-source drugs.

(9) "Outpatient drugs" means drugs which are obtained outside of a hospital.