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CMS is pleased to announce the release of the new 30 CCW Chronic Conditions file. This file contains validated and updated versions of the current 27 CCW Chronic Conditions, plus three new ones: Urologic Cancer (Kidney, Renal Pelvis and Ureter), All Cause Pneumonia, and Parkinson's Disease and Secondary Parkinsonism. Refer to the new algorithms, record layout, and codebook for the 30 CCW Chronic Conditions for details.

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CMS is pleased to announce the availability of Next Generation Accountable Care Organization (NGACO) Model Research Identifiable Files (RIFs) for Performance Year 4.

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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.

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CMS is pleased to announce the availability of updated 2019 Medicare Advantage (Part C) Encounter Data. These files were 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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CMS is pleased to announce the availability of Medicaid T-MSIS Analytic Files (TAFs) for calendar years 2019 (Release 1) and 2020 (Preliminary).

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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 2010 - 2019.

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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.

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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.

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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.