CMS is pleased to announce the release of two new annual files to the suite of research files based on state Transformed Medicaid Statistical Information System (T-MSIS) submissions, called T-MSIS Analytic Files (TAFs). This release includes the first version of the Annual Managed Care Plan (APL) and Annual Provider (APR) TAFs for calendar years 2014-2016.
The CMS Virtual Research Data Center (VRDC) is an alternative solution for accessing and analyzing CMS data for research purposes. To learn more about getting data for your research, refer to the Requesting VRDC Access information, view the CMS VRDC FAQs and visit the ResDAC website.
The Preliminary Medicare Advantage (Part C) Encounter Data Research Identifiable Files (RIFs) for Year 2019 are now available. Beginning with 2019 data, CMS will release a “Preliminary" version of the Medicare Advantage Encounter RIFs for each service year to give researchers earlier access to Encounter data in the research file format. Consult the data dictionaries and the user guide for more information.
National Death Index Data: NDI Cause of Death Information from 1999-2016 for Medicare beneficiaries and 1999-2013 for Medicaid recipients is now available. See the Record Layout and Codebook for more details.
CMS receives numerous requests for data which are used to develop aggregated statistics, charts and graphs. The CCW's Medicare Web Tables and Web Charts have been updated and are now available with data for years 2009 - 2018.
As a research database, CCW users are generally expected to pay fees to access and use data. Costs vary depending on beneficiary cohort size, years of data and files ordered. In preparation for submitting a data request, a cost estimation tool allows users to create an estimated cohort size and determine an estimated cost before moving to the next level in the data request process.
View the Chronic Conditions Data Warehouse informational video to learn how you can… Access… Analyze… and Aggregate… All the data you need… Like never before.
Welcome to the Chronic Conditions Data Warehouse
The CMS Chronic Conditions Data Warehouse (CCW) provides researchers with Medicare and Medicaid beneficiary, claims, and assessment data linked by beneficiary across the continuum of care. In the past, researchers analyzing data files were required to perform extensive analysis related to beneficiary matching, deduplication, and merging of the files in preparation for their study analysis. With the CCW data, this preliminary linkage work is already accomplished and delivered as part of the data files sent to researchers.
The Chronic Conditions Data Warehouse (CCW) is a research database designed to make Medicare, Medicaid, Assessments, and Part D Prescription Drug Event data more readily available to support research designed to improve the quality of care and reduce costs and utilization.
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