Actual Acquisition Cost (AAC)
The true price a pharmacy pays to purchase a drug, net of discounts and rebates. Payers increasingly reimburse based on AAC rather than list-price benchmarks to reflect real costs and curb overpayment.
What is Actual Acquisition Cost (AAC)?
Actual Acquisition Cost (AAC) is the real, net price that a pharmacy or provider pays to obtain a drug after accounting for discounts, rebates, and other price concessions. It reflects what the purchaser truly spent rather than a published list price or theoretical benchmark.
Because AAC strips out the gap between sticker prices and actual transaction prices, it is often determined through surveys of pharmacy invoices or similar cost data. The resulting figure is intended to be a faithful measure of the underlying cost of the medication.
What role does Actual Acquisition Cost play in the revenue cycle?
Payers, including state Medicaid programs, increasingly base drug reimbursement on AAC rather than older benchmarks tied to list prices, in order to pay closer to true cost and reduce overpayment. This shifts how providers and pharmacies are reimbursed and how margins on drugs are calculated.
For organizations that bill for medications, understanding AAC matters for setting expectations about reimbursement and for reconciling what was paid for a drug against what is recovered. Accurate cost tracking helps avoid surprises in margin and supports defensible billing of drug charges.
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