Description
Our Denominator (DN) files have the following data on individuals enrolled in Medicare between 1991 and 1998:
For 1999 - 2021 data, refer to the Master Beneficiary Summary File (MBSF) - Base Segment File page.
Variables Summary
The table below lists variable categories for and some key variables in Denominator (DN) data. For a full list of variables, review the DN data dictionary.
Demographics
Age, Beneficiary Identification Number, Date of Birth, Date of Death, Gender, Race, Residence County Code, Residence State, Residence Zip Code
Eligibility & Enrollment
Monthly Enrollment Counts (A/B/Both), Monthly Managed Care Indicator (Yes/No), Reasons for Entitlement, State Buy-In Indicators
Years Available
1991 - 1998
File Update Frequency
Annual
Data Dictionary Link
Visit the Data Documentation PageNIA Data Partners Offering DN
HABC, HRS, LLFS, NLTCS, NSHAP, PSAD, PSID, RADC, WLS
NIA Data Partners Not Offering DN
BLSA, CE, NHAS, NHATS, PT, UAS, UFOVT
Additional Resources
Master Beneficiary Summary File (MBSF) - Base Segment Files©2022 MedRIC