Find, Request and Use CMS Data

Enhancements to Part D data products – coming October 2026

CMS appreciates the feedback researchers provided over the past 18 months in response to CMS’ Request for Information and feedback opportunity. Based on this feedback, CMS has decided to delay the requirement to transition all research studies into the CCW VRDC indefinitely. Instead, CMS is implementing updated security requirements to better protect patient information while still meeting researchers’ needs. Please click here for more information on this announcement and the new requirements.

CMS is excited to announce that researchers may now request access to monthly data updates for research studies conducted using the Chronic Conditions Warehouse (CCW) Virtual Research Data Center (VRDC). For the full announcement https://resdac.org/cms-news.

We have an important update about contacting ResDAC.

Starting Monday, March 30, please use our new email address for all data requests, inquiries, and DUA maintenance tasks:

DataRequests@cms.hhs.gov

CMS is pleased to announce the availability of a new set of Research Identifiable Files (RIFs) for the Acute Hospital Care at Home (AHCAH) initiative. This is the second release of the data, covering the time period from April 2023 through September 2025.