CMS is pleased to announce the release of the Preliminary 2020 Medicare Advantage (MA, also known as Part C) Encounter Research Identifiable Files (RIFs). Beginning with 2019 data, CMS releases 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.

The 30 CCW Chronic Conditions segment of the Master Beneficiary Summary File (MBSF) flags each Medicare beneficiary for the presence of one of 30 specific chronic conditions.

What does this file include? (variable highlights)

  • Two flags for each chronic condition:
    • First occurrence date
    • End of year indicator

Special considerations

  • The algorithms used to assign the flags are available from the CCW website.
  • Algorithms requiring a multiple-year look back period are completed without requiring the researcher to order multiple years of data.
  • Algorithms search data from Medicare Fee-For-Service (FFS) claims.
  • This file is a segment that can be requested in addition to the Master Beneficiary Summary File (MBSF) base file.
  • The algorithms for the 30 CCW Chronic Conditions data file use only ICD-10-CM diagnosis codes. The first full calendar year that is used to identify conditions is 2016.
  • Three new conditions are added compared with the 27 CCW version.
  • The changes to the algorithms compared with the 27 CCW version are noted on the individual variable pages and detailed descriptions of changes can be found in the Chronic Conditions File Enhancements white paper.

Emma Riebel-Paszkiewicz joined ResDAC in January 2022. She holds a Bachelor of Arts in Psychology from New York University and a Master of Public Health in Public Health Administration and Policy from the University of Minnesota. She has a professional background providing community-based mental health services in the Twin Cities metro area.

ResDAC is sad to recognize the death of Dr. A. Marshall McBean. Marshall was the founding PI of ResDAC in 1995 and remained as such for 18 years. He was an initial instructor of CMS 101–a course that is still our most popular.