Understanding NADAC and Drug Price Transparency in America

What is Drug Price Transparency?

Drug price transparency refers to making the actual costs of medications visible to consumers, healthcare providers, and policymakers. In the US pharmaceutical market, prices are notoriously opaque — the price a manufacturer charges, the price a wholesaler pays, the price a pharmacy pays, and the price a patient pays can all be wildly different numbers.

The NADAC Database Explained

The National Average Drug Acquisition Cost (NADAC) is the most transparent drug pricing dataset available in the United States. Published by the Centers for Medicare & Medicaid Services (CMS), NADAC represents the actual prices pharmacies pay to acquire medications.

How NADAC Data is Collected

CMS contracts with Myers and Stauffer to conduct monthly surveys of retail community pharmacies across the country. The survey asks pharmacies to report their most recent invoice prices for a random sample of drugs. NADAC is then calculated as a weighted average of these reported prices.

Why NADAC Matters

NADAC is important because it shows the "real" cost of drugs at the pharmacy level, stripping away the layers of markups and discounts that make drug pricing so confusing. It helps:

• State Medicaid programs set fair reimbursement rates
• Consumers understand what pharmacies actually pay
• Researchers study drug pricing trends
• Policymakers identify pricing anomalies and potential market failures

Medicare Part D Spending Data

CMS also publishes detailed Medicare Part D spending data, which DrugPricePeek uses alongside NADAC. This dataset shows total Medicare spending, number of beneficiaries, and cost per unit for drugs covered under Part D. It reveals which drugs are driving Medicare spending and how costs change over time.

Key Insights from Medicare Data

The Part D spending data reveals striking patterns. A small number of specialty drugs account for a disproportionate share of total spending. Brand-name drugs make up only about 10% of prescriptions but nearly 80% of total spending. And price increases for some drugs far outpace inflation year after year.

The FDA National Drug Code Directory

The NDC Directory provides standardized information about every drug marketed in the United States. DrugPricePeek cross-references this with NADAC and Medicare data to provide complete drug profiles including pharmacologic class, dosage form, route of administration, and manufacturer information.

Recent Transparency Regulations

Several recent laws and regulations have pushed for greater drug pricing transparency:

• Inflation Reduction Act (2022): Requires manufacturers to pay rebates if they raise prices faster than inflation
• Hospital Price Transparency Rule: Requires hospitals to publish drug prices (often not well enforced)
• State laws: Over 30 states have passed drug pricing transparency laws requiring manufacturers to justify price increases

How DrugPricePeek Uses This Data

DrugPricePeek combines NADAC pricing, Medicare Part D spending data, and FDA drug information into a single searchable platform. This allows you to see what pharmacies actually pay for a drug, how much Medicare spends on it, what therapeutic alternatives exist, and how prices have changed over time.