On January 17, 2017, the Substance Abuse and Mental Health Services Administration (SAMHSA) finalized changes to the Confidentiality of Alcohol and Drug Abuse Patient Records Regulations, 42 CFR Part 2. Under these changes to the Part 2 regulations, CMS is now permitted to include substance use disorder claims data in the Research identifiable Files (RIFs).

CMS is pleased to announce that the Research Identifiable File (RIF) claims layout has been updated to Version K.

CMS is pleased to announce improvements to the Master Beneficiary Summary File (MBSF) to include timely Medicare Advantage (Part C) enrollment information and Medicare Prescription Drug (Part D) enrollment information.

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The Research, Statistics, Data & Systems page on the CMS website contains a number of links to CMS statistical information. You will find links to reports, publications, downloadable public use files, and descriptions of data available.

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Our guide to Getting Started with CMS Data will provide you with the resources to help you understand if CMS data is right for your project.

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Getting Started

New to CMS data? Check out this guide to Getting Started. You'll find resources on:

  • CMS data strengths and limitations
  • choosing the right files
  • preparing a data request
  • data analysis tips