Published October 3, 2026
There is a drug price that says a bottle of pills costs $14, and a government spreadsheet that says pharmacies paid 12 cents for the same pills. Both numbers are real. The $14 one is AWP. Grasping the NADAC vs AWP drug price difference is the fastest way to understand why American drug pricing looks the way it does.
AWP: the price nobody actually pays
AWP stands for Average Wholesale Price, and the name is the first lie: it is neither an average nor a wholesale price. Drug manufacturers report a list price to private publishers like MediSpan and First Databank, or the publishers calculate it by applying a markup, typically around 20 percent, to the manufacturer's Wholesale Acquisition Cost. Pharmacies buy from wholesalers like McKesson, Cardinal Health, or Cencora at prices that routinely sit far below AWP.
Researchers at 46brooklyn, who study this for a living, have a nickname for it: AWP is "ain't what's paid." Their visualization of the top 50 generics found that AWP bears almost no relation to actual acquisition prices. The most striking example: amlodipine besylate 10 mg tablets carry an AWP that is 123 times their NADAC. Not 123 percent. One hundred and twenty-three times.
NADAC: the price from actual invoices
NADAC, the National Average Drug Acquisition Cost, comes from the other end of the process. CMS surveys retail pharmacies about the invoice prices they actually paid wholesalers, then publishes a simple average per drug, updated weekly. It covers the vast majority of covered outpatient drugs and is freely available, which is why our NADAC Drug Price Lookup can show you what pharmacies paid for thousands of generics.
NADAC is not perfect. It is built on invoice prices, so it misses off-invoice rebates and discounts, and the survey data is weeks old by publication. But it is grounded in money that changed hands, which is more than AWP can say.
How far apart they are, in one worked example
Take a generic with an AWP of $100 per tablet and a NADAC of $15. That is an 85 percent "discount" off AWP, squarely in the typical 75 to 85 percent range for generics (brands run much closer, around AWP minus 18 percent). Now watch what happens in the payment chain: a health plan whose PBM contract pays "AWP minus 80 percent" pays $20 per tablet. The pharmacy acquired it for $15. The $5 gap, per tablet, before any dispensing fee, is the PBM's spread, and it exists because the contract is written in a fictional currency.
One pharmacy podcast walked through an even starker real case: a specialty generic the pharmacy sourced for $0.69 a tablet while the plan was billed off an AWP of $343. The bigger the NADAC-to-AWP gap, the more room intermediaries have to take a cut. That is the whole story in one sentence.
My honest take
AWP persists because millions of contracts are written in it, and rewriting them is expensive for the people who profit from the gap. NADAC is the honest number, and state Medicaid programs have increasingly adopted it for exactly that reason, but it has its own flaws: voluntary survey participation, reporting lag, and blind spots on rebates. The direction of travel is toward NADAC-based payment. The speed of travel is set by everyone who benefits from the current confusion.
Frequently asked questions
What is the difference between NADAC and AWP?
NADAC is the National Average Drug Acquisition Cost, a CMS-published average of what retail pharmacies actually paid wholesalers, based on invoice surveys. AWP is the Average Wholesale Price, a manufacturer-reported or publisher-calculated list price that is typically far higher and, despite the name, is not based on wholesale transactions.
Why is AWP so much higher than what pharmacies pay?
AWP is a list price, often set at roughly 20 percent above the manufacturer's wholesale list price, with no connection to negotiated transaction prices. For generics, the gap is enormous: NADAC-based reimbursement typically lands 75 to 85 percent below AWP.
Which price do pharmacies actually get reimbursed on?
Increasingly, NADAC. Most state Medicaid programs now use NADAC as a component of pharmacy reimbursement, often structured as NADAC plus a professional dispensing fee. Private payers still use a mix of benchmarks.
Is AWP being replaced by NADAC?
Gradually, in Medicaid. But AWP remains embedded in countless commercial contracts, and replacing a pricing benchmark means renegotiating every contract written in it. Expect a long coexistence, not a clean handoff.
See the real numbers: look up what pharmacies actually paid for your prescriptions in the NADAC Drug Price Lookup.
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