Center for Administrative Data Research (CADR)

The Center for Administrative Data Research (CADR) serves to provide leadership and training in the use of health services administrative data in clinical epidemiologic, health services and outcomes research, aiming to:

  • House and maintain a repository of administrative data and/or information about data sources
  • Train investigators on the ethical and secure use of administrative data
  • Provide leadership on the development and growth of administrative databases that can be used for research
  • Facilitate collaboration among interdisciplinary investigators using administrative data
  • Advance the effective use of public data to inform researchers, policymakers and the public about health and health care
  • Services & Resources

  • Assist investigators with preliminary feasibility queries
  • Assist investigators with choosing the appropriate databases
  • Assist investigators with data security and confidentiality through data use agreements
  • Assist investigators with obtaining information from multiple administrative data sources
  • Assist in preparation of grant applications to demonstrate capacity and expertise
  • Provide programming resources and support for management of administrative databases
  • Train investigators on the use of administrative databases
  • Provide information about projects, publications and investigators at Washington University using administrative data

Facilities & Other Resources

See the Tools/Software and Resources/Reports pages.

User Expectations

CADR expects that investigators will be aware of the potential difficulties of working with very large datasets. We suggest that you read through the material on the Choosing the Right Database page of the CADR website.


The IBM® MarketScan® Commercial Database has expanded to include 12 years of data (2006-2017). The MarketScan database is an extremely large, complex collection of individual-level medical and pharmacy claims from private healthcare plans.  The MarketScan Multi-State Medicaid Database, which includes individuals enrolled in State and/or Medicaid Managed Care programs, has expanded to include the years 2011-2017.

Additions to the AHRQ Healthcare Cost and Utilization Project (HCUP) data inventory include the 2016 National Inpatient Sample (NIS), the 2015 Nationwide Emergency Department Sample (NEDS), and 2016 State data from NY, FL and WI.


Congratulations to Dr. David Limbrick, Jr. on his $2.8M PCORI award following a 2013 ICTS Just-in-Time award for CADR services to study Chiari Malformation Type 1.

Request a service

Complete the CADR/DIRC Intake form to determine service needs. Email or contact Anita Hellstrom, CADR Program Coordinator, at 314.286.0850 or for consultation or inquiries.

Service available to:

Due to restrictions imposed by our data use agreements, direct access to most data is limited to Washington University faculty, staff, and students.  Other members of the ICTS interested in working with data in the CADR repository are encouraged to collaborate with WU investigators.

Service Fees

Contact Information

Center for Administrative Data Research
See our program website for more detailed information.


Margaret Olsen, PhD, MPH

Anita Hellstrom
Program Coordinator