Updated research request forms and data security approval requirement effective 4/24/23
CMMI Model Data Sharing (CMDS) Initiative Makes New Model Participation Data Available to Researchers
CMS is pleased to announce the availability of Research Identifiable Files (RIFs) for four additional CMS Innovation Center models.
CMS is releasing new participation data for the following models:
CMS Public Use Files for Researcher Use
Public Use Files (PUFs) are non-identifiable data that do not contain any protected health information (PHI) or personally identifiable information (PII). The Centers for Medicare & Medicaid Services (CMS) makes PUFs freely available for download.
Research Identifiable File Data Use Agreement Policies
The Centers for Medicare & Medicaid Services (CMS) makes certain data files available to internal and external stakeholders as allowed by federal laws, regulations, and CMS policy. Below are several policy resources that guide researchers in understanding, requesting, and using CMS research data.
Gracie Diehl
Gracie Diehl joined ResDAC in December 2023 as a Data Processing Associate. Gracie graduated from Illinois College with a Bachelor of Science degree in Psychology, Neuroscience, and Japanese Studies. She has previous experience coordinating psychiatric studies and teaching English as a foreign language
Acute Hospital Care at Home (AHCAH) Data Now Available
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.
Acute Hospital Care at Home (AHCAH) - Patient
The Acute Hospital Care at Home (AHCAH) initiative, launched in November 2020 in response to the COVID-19 pandemic, allows Medicare-certified hospitals to treat patients with inpatient-level care at home. Data contained within the AHCAH data set was collected by CMS directly from individual hospitals on either a weekly or monthly basis depending on their participation tier, which is based on the level of experience the facility has with providing hospital at-home services.
The AHCAH dataset contains two files, a Hospital file and a Patient file, which are both provided for a research request (i.e., cannot be requested separately). The Patient file contains a record for each AHCAH admission for the patient, and includes other beneficiary-specific data such as the beneficiary’s program eligibility status (Medicare, Medicaid, Dual) and the state Medicaid identifier, if applicable. The file also contains the facility submission date for the data represented in the file record. The submission date represents the data submitted by the facility for the previous month.
Each file contains the monthly or weekly submitted data for each participating hospital for the time period from November 2020 through March 2023 (29 months). A second data release is planned for the future at a date to be determined.
What does this file include? (variable highlights)
- CCW Beneficiary Identifier
- Beneficiary Program Identifier (Medicare, Medicaid, Dual)
- Admission Date for In-Home Care Episode
- Beneficiary State Medicaid Identifier
- CMS Certifications Number (CCN), also known as the Facility Identifier
- Facility Waiver Participation Tier (based on the level of experience the facility has with providing hospital at-home services)
- Facility Waiver Submission Identifier
- Data Submission Date
- Facility Location Information
Special Considerations
- AHCAH data may need to be requested in conjunction with Part A claims data to fully understand the information in the AHCAH dataset.
- Questions about the data should be directed to ResDAC at resdac@umn.edu.
Acute Hospital Care at Home (AHCAH) - Hospital
The Acute Hospital Care at Home (AHCAH) initiative, launched in November 2020 in response to the COVID-19 pandemic, allows Medicare-certified hospitals to treat patients with inpatient-level care at home. Data contained within the AHCAH data set was collected by CMS directly from individual hospitals on either a weekly or monthly basis depending on their participation tier, which is based on the level of experience the facility has with providing hospital at-home services.
The AHCAH dataset contains two files, a Hospital file and a Patient file, which are both provided for a research request (i.e., cannot be requested separately). The Hospital file contains hospital-specific information, including facility location information, the waiver participation tier, and the submission date for the data represented in the file record. The submission date represents the data submitted by the facility for the previous month or week.
The Hospital file also contains three key metrics related to the in-home care provided during the data submission time period:
- The number of admissions to the inpatient home care setting
- The number of patient escalations of care, where the patient is transferred from the home back to the hospital, and
- The number of unexpected patient mortalities
Each file contains the monthly or weekly submitted data for each participating hospital for the time period from November 2020 through March 2023 (29 months). A second data release is planned for the future at a date to be determined.
What does this file include? (variable highlights)
- CMS Certification Number (CCN), also known as the Facility Identifier
- Facility Waiver Participation Tier (based on the level of experience the facility has with providing hospital-at-home services)
- Facility Waiver Submission Identifier
- Data Submission Date
- Discharges
- Escalations
- Mortalities
- Facility Location Information
Special Considerations
- AHCAH data may need to be requested in conjunction with Part A claims data to fully understand the information in the AHCAH dataset.
- Questions about the data should be directed to ResDAC at resdac@umn.edu.