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This comparison data, published on a weekly basis, identifies drug products with current NADAC rates that have been replaced with new rates since the current NADAC weekly reference file was posted. This file will not be inclusive of all new and terminated NDCs. For more information on the data fields used in the weekly comparison, please review the NADAC Week to Week Data Field Definitions.
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| name | year | month | date |
We update the National Average Drug Acquisition Cost (NADAC) data and comparison data weekly. Each month we post new data, including findings from the previous month’s survey and weekly price changes that have occurred before the release of the next month’s NADAC data.
Beginning with the December 2024 monthly NADAC rate updates, which will be effective 12/18/2024, CMS is implementing a temporary, short-term measure intended to address recent rate volatility occurring as a result of fluctuations in survey participation. Specifically, monthly NADAC updates for generic drugs will be calculated using a three-month moving average. This three-month moving average will utilize the individual calculated monthly average acquisition costs from the most recent three months and become the updated generic NADAC rate. CMS is adopting a three-month moving average in order to moderate monthly rate volatility while also ensuring that rates remain responsive to change in market conditions.
The three-month moving average approach will not be applied to NADAC rates for brand drugs. Brand drugs utilize a separate time frame for monthly rate calculations and the application of a moving average methodology is not necessary to prevent rate volatility at this time.
The use of the three-month moving average for generic drugs will continue until further notice. To address the potential for future rate volatility on a more permanent basis, CMS plans to solicit stakeholder input regarding the NADAC methodology.
The NADAC Monthly file is produced on the first Monday on or after the 15th of each month. All other files during the calendar month are weekly postings.
For more information on the fields in the NADAC data, please review the NADAC Data Field Definitions. Find more NADAC information on the Survey of Retail Prices page.
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We calculate the Affordable Care Act Federal Upper Limit (FUL) data according to the Medicaid Covered Outpatient Drug final regulation with comment. We update FUL values monthly, and they are effective on the first day of the month following the publication. States have up to 30 days after the effective date to implement the FUL. Further information on the FUL program can be found on the Federal Upper Limit page.
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To request 2017 FFS state reports and attachments, including attachments related to the state reports in the table below, please contact the DUR resource mailbox, CMSDUR@cms.hhs.gov.
| Year | State Full Name | Title |
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| Year | State Full Name | Title |
