Research Data Core

The Research Data Core (RDC) provides a relational database produced from Tennessee Medicaid and TennCare. The database includes Medicaid enrollment, Medicaid and TennCare professional and institutional encounters and pharmacy records. Medicaid enrollment is augmented with information from birth, death and fetal death certificates through a probabilistic linkage. Medical encounters are augmented with Medicare and Hospital Discharge Data System records.

This database has potential for use in pharmacoepidemiology or program evaluation.

  • Medicaid is a federal program, funded by both federal and state governments and administered by the state government. Medicaid provides a degree of medical care which varies state by state to low-income families or individuals.  

    The RDC includes Tennessee Medicaid enrollment, institutional and professional records and pharmacy records since 1974.

  • TennCare is the managed care implementation of Tennessee Medicaid. A description of the TennCare program is at

    The RDC includes TennCare encounters and pharmacy records since its inception, January 1, 1994.

  • Medicare is the federal health insurance program for people who are age 65 and for some younger people with certain specified disabilities. Medicare enrollment includes some or all of the following categories:

    Part A - hospitalization or skilled nursing care

    Part B - physician and other professional services

    Part C - Medicare Advantage Plans

    Part D - prescription drugs

    The RDC includes Medicare Part A records selected for Tennessee Medicaid enrollees for the period from 1993 through October 1999.

    Beginning in 2006 the RDC includes Medicare enrollment and Part D records selected for Tennessee Medicaid enrollees.

  • The Hospital Discharge Data System (HDDS) is a database of all hospital and emergency department discharges in Tennessee. A description of the HDDS program is at

    The RDC includes HDDS records since 1998.

  • The Tennessee Office of Vital Records maintains records of all births and deaths occurring within the state plus many of the births and deaths occurring outside Tennessee but to Tennessee residents.

    The RDC includes birth certificate records, death certificate records and fetal death certificate records since 1974.