CMS is pleased to announce the availability of Medicare Risk Score Research Identifiable Files (RIFs) for Payment Year 2014 (PY14). Risk scores are used to adjust payments to Medicare Advantage plans to account for differences in relative costs among plan enrollees.

This file will be released twice a year, to support the proposed and final rule publications for the HH Prospective Payment System. The file includes partitioning 60-day episodes into 30-day periods, as required by section 51001(a) of the Bipartisan Budget Act of 2018.

National Death Index (NDI) Cause of Death Information is now available from 1999-2016 for Medicare beneficiaries and 1999-2013 for Medicaid recipients.

CMS is pleased to announce the availability of Medicare Advantage (Part C) Encounter Data Research Identifiable Files (RIFs).  These files are created from data submitted to CMS by Medicare Advantage Organizations (MAOs) that provide services to beneficiaries under the Medicare Part C benefit.

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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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Interested in requesting CMS data? Visit our CMS Data Request Center where you will find resources for preparing and submitting your request.


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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