Accessing CMS Data

Research files created by the Medicare & Medicaid Resource Information Center (MedRIC) link HRS data to detailed information about health care utilization from records maintained by the Centers for Medicare & Medicaid Services (CMS).

Available Data

Links in this table lead to the data file description on the MedRIC website.

CMS Research Files Available Years
Parts A & B Research Files 1991-2018
Denominator (DN) 1991-1998
Home Health Outcome and Assessment Information Set (OASIS) Research Files 1999-2018
Long-Term Care Minimum Data Set (MDS) Research Files 1999-2018
Master Beneficiary Summary File (MBSF) - Base Segment Files 1999-2018
Medicaid Analytic Extracts (MAX) and Summary Files 1999-2012
Medicare Provider Analysis and Review (MedPAR) Research Files 1991-2018
Part D Drug Event (PDE) Research Files 2006-2018
Part D Medication Therapy Management (MTM) Files 2013-2018

Encryption Level

For most Medicare and Medicaid files (all except Medicare PDE) researchers may apply for three different levels of data:

  • Level 1: The standard release, which contains enrollment and utilization information but omits geographic identifiers and masks provider identifiers, which should meet the needs of most users

  • Level 2: A geographic release, which adds beneficiary state, county and zip code to the above

  • Level 3: A provider release, which includes complete provider identifiers and geographic information for respondents and providers.


Application Process

Unlike other HRS restricted data, the HRS linked CMS data are created and supplied by others. While HRS is your first step in applying for the HRS linked CMS data, you will have additional application processes and will access the data through the MedRIC Health & Aging Data (HaAD) Enclave. Upon HRS approval you will submit your request for HRS-CMS linked claims to MedRIC.

Step 1. Submit Application for HRS Restricted Data

Step 2. Request a MedRIC data licensing agreement

Step 3. Data Access

  • You will be contacted by MedRIC staff with the details you need to log in to the MedRIC HaAD Enclave.