Knowledgebase

ResDAC has developed over 100 articles that cover topics ranging from the CMS data request process through using the data for a study. CMS has developed additional resources, including TAF data quality briefs and TAF data quality state snapshots, examining the quality of the Medicaid data.
Introductory
Articles
CMS offers files from aggregate data to individual person level data. This article describes the differences between the aggregate, public use files, the limited data sets,…
This article describes the Federal Regulations that govern the release of CMS data for research.
The purpose of this article is to identify 1) common strengths of Medicare and Medicaid administrative data and 2)  broad limitations for researchers to consider when…
CMS must ensure that all research requests for identifiable (RIF) data have IRB documentation to satisfy the requirements of the Common Rule and the Health Insurance Portability and Accountability Act (HIPAA). This article describes the requirements and presents examples of acceptable IRB documentation. The IRB documentation must indicate that there was a review that satisfies the following two requirements:
To describe the CMS cell size suppression policy and provide examples of common scenarios and possible options.
Under changes to the Part 2 regulations on January 17, 2017, CMS is now permitted to include substance use disorder claims data in the Research Identifiable Files (RIFs).  Research Identifiable Files shipped or extracted in the VRDC after 05/22/2017 are no longer subject to the redaction.
States that have "Opted-In" to data sharing under the State Research request process are required to submit quarterly logs to CMS. 
The Centers for Medicare & Medicaid Services (CMS) seeks to ensure the protection of CMS data that are disclosed to external organizations for research purposes. To accomplish this, CMS has developed the Data Privacy Safeguard Program (DPSP). The DPSP reflects the Agency's priorities to both improve data stewardship and to protect the privacy and security of CMS research identifiable files (RIF) that are made available for conducting important research studies.
CMS offers files from aggregate data to individual person level data. This article describes the differences between the aggregate, public use files, the limited data sets, and research identifiable files.
This article describes the Federal Regulations that govern the release of CMS data for research.
This article outlines the availability of date of service information for the Limited Data Set (LDS) Medicare claims files.