New Monthly Data Access04/30/2026 - 10:10am CDT ]]>CMS is excited to announce that researchers may now request access to monthly data updates for research studies conducted using the Chronic Conditions Warehouse (CCW) Virtual Research Data Center (VRDC). For the full announcement https://resdac.org/cms-news.

]]>Read full news]]>Important: New Email Address for CMS Research Identifiable File Requests03/23/2026 - 11:00am CDT ]]>We have an important update about contacting ResDAC.

Starting Monday, March 30, please use our new email address for all data requests, inquiries, and DUA maintenance tasks:

DataRequests@cms.hhs.gov

]]>Read full news]]>Acute Hospital Care at Home (AHCAH) Data Now Available03/17/2026 - 10:00am CDT ]]>CMS is pleased to announce the availability of a new set of Research Identifiable Files (RIFs) for the Acute Hospital Care at Home (AHCAH) initiative. This is the second release of the data, covering the time period from April 2023 through September 2025.

]]>Read full news]]><![CDATA[Research Data Request & Access Policy Changes Update]]>02/11/2026 - 12:00pm CST ]]>CMS appreciates the feedback researchers provided over the past 18 months in response to CMS’ Request for Information and feedback opportunity. Based on this feedback, CMS has decided to delay the requirement to transition all research studies into the CCW VRDC indefinitely. Instead, CMS is implementing updated security requirements to better protect patient information while still meeting researchers’ needs. Please click here for more information on this announcement and the new requirements.

]]>Read full news]]>2023 and 2024 T-MSIS Medicaid and CHIP Data Now Available12/17/2025 - 9:00am CST ]]>CMS is pleased to announce that Medicaid T-MSIS Analytic Files (TAFs) for service years 2023 and 2024 are now available.

]]>Read full news]]>Long-Term Care Hospital (LTCH) Continuity Assessment Record and Evaluation (CARE) Data Set (LCDS) Now Available12/04/2025 - 2:00pm CST ]]>CMS is pleased to announce the availability of the Long-Term Care Hospital (LTCH) Continuity Assessment Record and Evaluation (CARE) Data Set (LCDS) as a new Research Identifiable File (RIF).

]]>Read full news]]>Kidney Care Choices (KCC) Model Data Now Available11/19/2025 - 10:00am CST ]]>CMS is pleased to announce the availability of new Research Identifiable Files (RIFs) for the Center for Medicare and Medicaid Innovation (Innovation Center) Kidney Care Choices (KCC) Model.

]]>Read full news]]>New Enrollee-level EDGE Data Now Available for Research09/26/2025 - 1:31pm CDT ]]>CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2023 benefit year to requesters who seek the data for research purposes. 

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers04/22/2025 - 9:30am CDT ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for two additional CMS Innovation Center models.

]]>Read full news]]>Improvements to the MBSF Base A/B/C/D file and the MBSF OTCC file!03/07/2025 - 9:00am CST ]]>CMS is pleased to announce the release of the enhanced Master Beneficiary Summary File (MBSF) Base A/B/C/D Version 2 (V2) file starting with the 2023 enrollment year. Additionally, the MBSF Other Chronic and Potentially Disabling Conditions (OTCC) file has also been improved.

]]>Read full news]]><![CDATA[Research Data Request & Access Policy Changes Feedback Opportunity]]>01/16/2025 - 9:30am CST ]]>The Centers for Medicare & Medicaid Services (CMS) continues to evaluate our research data request and access policies, processes, and tools to ensure we are maximizing protections for controlled unclassified information (e.g., personally identifiable information and protected health information) while also enabling important research using CMS data.

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers12/30/2024 - 10:00am CST ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for one additional CMS Innovation Center model.

]]>Read full news]]>Accountable Health Communities (AHC) Model Data Now Available12/30/2024 - 10:00am CST ]]>CMS is pleased to announce the availability of a new Research Identifiable File (RIF) for the Center for Medicare and Medicaid Innovation (Innovation Center) Accountable Health Communities (AHC) Model.

]]>Read full news]]>2022 and 2023 T-MSIS Medicaid and CHIP Data Now Available12/19/2024 - 10:00am CST ]]>CMS is pleased to announce that updated and preliminary Medicaid T-MSIS Analytic Files (TAFs) for service years 2022 and 2023, respectively, are now available.

]]>Read full news]]>DUA Extension and Closure Policy11/07/2024 - 2:30pm CST ]]>All DUAs, regardless of how the data is accessed, must be extended annually or closed if you are no longer using the data.

]]>Read full news]]><![CDATA[Important Research Data Request & Access Policy Changes]]>09/20/2024 - 1:00pm CDT ]]>(Updated 09/20/24): In February 2024, CMS announced planned changes to our research data access policy to help protect sensitive beneficiary information from increasing security risks.

]]>Read full news]]>New Enrollee-level EDGE Data Now Available for Research09/16/2024 - 11:00am CDT ]]>CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2022 benefit year to requesters who seek the data for research purposes.

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers08/22/2024 - 10:17am CDT ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for one additional CMS Innovation Center model.

]]>Read full news]]>DUA Extension and VRDC Access Renewal Reminder06/17/2024 - 8:42am CDT ]]>Reminder: Data Use Agreements (DUAs) and Virtual Research Data Center (VRDC) access needs to be extended or renewed annually.  

]]>Read full news]]>2022 Preliminary Medicare Encounter Data Now Available05/21/2024 - 10:00am CDT ]]>CMS is pleased to announce the release of the Preliminary 2022 Medicare Advantage (MA, also known as Part C) Encounter Research Identifiable Files (RIFs).

]]>Read full news]]>Oncology Care Model (OCM) Data Now Available05/16/2024 - 11:00am CDT ]]>CMS is pleased to announce the availability of a set of Research Identifiable Files (RIFs) from the CMS Innovation Center's Oncology Care Model (OCM).

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers05/16/2024 - 11:00am CDT ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for three additional CMS Innovation Center models.

]]>Read full news]]>Medicare Bayesian Improved Surname Geocoding (MBISG) Data Now Available03/27/2024 - 10:00am CDT ]]>CMS is pleased to announce the availability of a new Research Identifiable File (RIF) that utilizes the Medicare Bayesian Improved Surname Geocoding (MBISG) algorithm to predict the race and ethnicity of Medicare beneficiaries.

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers03/12/2024 - 11:00am CDT ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for four additional CMS Innovation Center models.

]]>Read full news]]>CMS Announces Important Changes to Data Request and Access Policies for Researchers02/12/2024 - 11:05am CST ]]>The Centers for Medicare & Medicaid Services (CMS) has announced two changes to the current research data request and access policies.

]]>Read full news]]>Acute Hospital Care at Home (AHCAH) Data Now Available01/16/2024 - 10:00am CST ]]>CMS is pleased to announce the availability of a new set of Research Identifiable Files (RIFs) for the Acute Hospital Care at Home (AHCAH) waiver program.

]]>Read full news]]>ResDAC is now your one-stop shop for all CMS Research Data Use Agreement requests!12/15/2023 - 4:00pm CST ]]>The Research Data Assistance Center (ResDAC) is expanding its services to become your comprehensive resource for all research data use agreement (DUA) needs.

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers12/14/2023 - 11:00am CST ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for three additional CMS Innovation Center models.

]]>Read full news]]>Updated 2021 Medicare Advantage (Part C) Encounter Data Now Available12/11/2023 - 10:00am CST ]]>CMS is pleased to announce the availability of updated 2021 Medicare Advantage (Part C) Encounter data.

]]>Read full news]]>2021 and 2022 T-MSIS Medicaid and CHIP Data Now Available12/01/2023 - 4:00am CST ]]>CMS is pleased to announce that updated and preliminary Medicaid T-MSIS Analytic Files (TAFs) for service years 2021 and 2022, respectively, are now available.

]]>Read full news]]>New Enrollee-level EDGE Data Now Available for Research07/14/2023 - 8:00am CDT ]]>CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2021 benefit year to requesters who seek the data for research purposes.

]]>Read full news]]>2021 Preliminary Medicare Encounter Data Now Available06/09/2023 - 10:00am CDT ]]>CMS is pleased to announce the release of the Preliminary 2021 Medicare Advantage (MA, also known as Part C) Encounter Research Identifiable Files (RIFs).

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers05/01/2023 - 9:00am CDT ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for two additional CMS Innovation Center models.

]]>Read full news]]>Million Hearts® Cardiovascular Disease Risk Reduction Model Data Now Available05/01/2023 - 9:00am CDT ]]>CMS is pleased to announce the availability of a set of Research Identifiable Files (RIFs) from the CMS Innovation Center Million Hearts® Cardiovascular Disease Risk Reduction Model.

]]>Read full news]]>Updated Research Request Forms and Data Security Approval Requirement effective 4/24/2303/03/2023 - 12:00pm CST ]]> 

 

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers02/01/2023 - 10:00am CST ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for two additional CMS Innovation Center models.

]]>Read full news]]>PY3, PY4 and PY5 of Comprehensive ESRD Care (CEC) Model RIFs Now Available01/09/2023 - 10:00am CST ]]>CMS is pleased to announce the availability of PY3, PY4 and PY5 of two Research Identifiable Files (RIFs) that contain data from the Comprehensive ESRD Care (CEC) Model. The first file, the CEC Beneficiary RIF, contains enrollment data for beneficiaries in the CEC Model. A second file, the CEC Provider RIF, contains identifying information about the providers participating in the CEC Model.

]]>Read full news]]>2021 Preliminary Medicaid and CHIP Data Now Available12/08/2022 - 10:00am CST ]]>CMS is pleased to announce the availability of Preliminary Medicaid T-MSIS Analytic Files (TAFs) for calendar year 2021.

]]>Read full news]]>2020 Medicare Advantage (Part C) Encounter Data Now Available11/15/2022 - 10:00am CST ]]>CMS is pleased to announce the availability of updated 2020 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.

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers11/02/2022 - 10:00am CDT ]]>CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for four additional CMS Innovation Center models.

]]>Read full news]]><![CDATA[PY5 & PY6 of Next Generation ACO Model RIFs Now Available]]>11/02/2022 - 10:00am CDT ]]>CMS is pleased to announce the availability of Next Generation Accountable Care Organization (NGACO) Model Research Identifiable Files (RIFs) for Performance Years 5 & 6 (2020-2021).

]]>Read full news]]>2020 Medicaid and CHIP Data Now Available10/27/2022 - 12:00pm CDT ]]>CMS is pleased to announce the availability of new Medicaid T-MSIS Analytic Files (TAFs) for service year 2020.

]]>Read full news]]>CMS releases new forms to improve research data request process!10/24/2022 - 4:30pm CDT ]]>CMS is pleased to announce two modifications that aim to streamline and simplify the Research Identifiable File (RIF) data request process.

]]>Read full news]]>Updated National Death Index (NDI) Data Available in the VRDC09/15/2022 - 10:00am CDT ]]>CMS is pleased to announce the release of updated NDI data available in the VRDC.

]]>Read full news]]>CMMI Model Data Sharing (CMDS) Initiative Makes Model Participation Data Available to Researchers08/26/2022 - 10:00am CDT ]]>CMS is pleased to announce the availability of new Research Identifiable Files (RIFs) for six CMS Innovation Center models.

]]>Read full news]]>New Enrollee-level EDGE Data Now Available for Research08/15/2022 - 8:00am CDT ]]>CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2020 benefit year to requesters who seek the data for research purposes.

]]>Read full news]]>2020 Preliminary Medicare Encounter Data Now Available05/13/2022 - 9:00am CDT ]]>CMS is pleased to announce the release of the Preliminary 2020 Medicare Advantage (MA, also known as Part C) Encounter Research Identifiable Files (RIFs).

]]>Read full news]]>New Chronic Conditions File Added to the Master Beneficiary Summary File03/07/2022 - 9:00am CST ]]>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 details.

]]>Read full news]]>PY4 of Next Generation ACO Model RIFs Now Available12/01/2021 - 10:00am CST ]]>CMS is pleased to announce the availability of Next Generation Accountable Care Organization (NGACO) Model Research Identifiable Files (RIFs) for Performance Year 4.

]]>Read full news]]>2019 Medicare Advantage (Part C) Encounter Data Now Available11/18/2021 - 9:00am CST ]]>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.

]]>Read full news]]>Founding PI of ResDAC Passes at 7911/09/2021 - 12:00pm CST ]]>ResDAC is sad to recognize the death of Dr. A. Marshall McBean, the founding PI of ResDAC in 1995.

]]>Read full news]]>2020 Preliminary Medicaid and CHIP Data Now Available11/03/2021 - 9:00am CDT ]]>CMS is pleased to announce the availability of Preliminary Medicaid T-MSIS Analytic Files (TAFs) for calendar year 2020.

]]>Read full news]]>2019 Medicaid and CHIP Data Now Available09/30/2021 - 9:00am CDT ]]>CMS is pleased to announce the availability of new Medicaid T-MSIS Analytic Files (TAFs) for service year 2019.

]]>Read full news]]>Updated 2017-2018 Medicaid and CHIP Data Now Available09/03/2021 - 9:00am CDT ]]>CMS is pleased to announce that updated Medicaid T-MSIS Analytic Files (TAFs) for service years 2017 and 2018 are now available.

]]>Read full news]]>New Enrollee-level EDGE Data Now Available for Research08/26/2021 - 1:00pm CDT ]]>CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2019 benefit year to requesters who seek the data for research purposes.

]]>Read full news]]>Next Generation ACO Model Data Now Available08/24/2021 - 10:00am CDT ]]>CMS is pleased to announce the availability of new Next Generation Accountable Care Organization (NGACO) Model Research Identifiable Files (RIFs) for Performance Years 1-3.

]]>Read full news]]>New Comprehensive ESRD Care (CEC) RIF Data Available07/08/2021 - 10:00am CDT ]]>CMS is pleased to announce the availability of two new RIFs that contain data from the Comprehensive ESRD Care (CEC) Model. The first file, the CEC Beneficiary RIF, contains enrollment data for beneficiaries in the CEC Model. A second file, the CEC Provider RIF, contains identifying information about the providers participating in the CEC Model.

]]>Read full news]]>New Medicaid and CHIP Data Now Available06/03/2021 - 10:00am CDT ]]>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). Today’s release includes the first version of the Annual Managed Care Plan (APL) and Annual Provider (APR) TAFs for calendar years 2014–2016.

]]>Read full news]]>2019 Preliminary Medicare Encounter Data Now Available05/28/2021 - 10:00am CDT ]]>CMS is pleased to announce the release of the Preliminary 2019 Medicare Advantage (MA, also known as Part C) Encounter Research Identifiable Files (RIFs). 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.

]]>Read full news]]>2019 Preliminary Medicaid and CHIP Data Now Available12/16/2020 - 10:00am CST ]]>CMS is pleased to announce the availability of Preliminary Medicaid T-MSIS Analytic Files (TAFs) for calendar year 2019.

]]>Read full news]]>New Enrollee-level EDGE Data Now Available for Research12/07/2020 - 10:00am CST ]]>CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2017 and 2018 benefit years to requesters who seek the data for research purposes.

]]>Read full news]]>Updated 2014-2016 Medicaid and CHIP Data Now Available11/19/2020 - 8:00am CST ]]>CMS is pleased to announce that updated Medicaid T-MSIS Analytic Files (TAFs) for service years 2014, 2015, and 2016 are now available.

]]>Read full news]]>2018 Medicare Advantage (Part C) Encounter Data Now Available11/04/2020 - 10:00am CST ]]>CMS is pleased to announce the availability of the 2018 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.

]]>Read full news]]>2017-2018 Medicaid and CHIP Data Now Available09/16/2020 - 10:00am CDT ]]>CMS is pleased to announce the availability of the Medicaid T-MSIS Analytic Files (TAFs) for calendar years 2017-2018 (Release 1).

]]>Read full news]]>Medicaid Data Quality Atlas Tool for Researchers Now Available08/03/2020 - 12:00pm CDT ]]>The Centers for Medicare & Medicaid has released a new public online tool called the “Data Quality (DQ) Atlas” allowing individuals to review the quality and usability of Transformed Medicaid Statistical Information System (T-MSIS) Research Identifiable Files (RIF) and determine if the data can meet research needs.

]]>Read full news]]>Updated Medicaid and CHIP Data Available Later this Year07/30/2020 - 3:00pm CDT ]]>CMS is pleased to announce that updated Medicaid T-MSIS Analytic Files (TAFs) for service years 2014, 2015, and 2016 will be available in late 2020.

]]>Read full news]]>2017 Medicare Advantage (Part C) Encounter Data Now Available05/28/2020 - 9:00am CDT ]]>CMS is pleased to announce the availability of the 2017 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.

]]>Read full news]]>SPADEs File Now Available04/16/2020 - 10:00am CDT ]]>CMS is pleased to announce the availability of Standardized Patient Assessment Data Elements (SPADEs) File. CMS developed these standardized data elements to meet the requirements of the Improving Medicare Post-Acute Care Transformation (IMPACT) Act of 2014.

]]>Read full news]]>Medicare Advantage (Part C) Encounter Data RIFs Final Version07/17/2019 - 3:00pm CDT ]]>CMS is pleased to announce the availability of the Final Version of the Medicare Advantage (Part C) Encounter Data RIFs for service year 2015. 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.

]]>Read full news]]>Medicare Advantage (Part C) Encounter Data RIFs08/30/2018 - 10:29am CDT ]]>CMS is pleased to announce the availability of Medicare Advantage (Part C) Encounter Data 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.

]]>Read full news]]>New Home Health (HH) OASIS LDS File07/02/2018 - 3:15pm CDT ]]>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.

]]>Read full news]]>