Leaf is a self-service tool which provides UW investigators with a user friendly interface for querying the electronic health system records within UW Medicine. Unlike other cohort discovery tools, Leaf interacts directly with live data from the electronic health system and can generate reports in real time. Electronic health system data can help investigators answer a variety of questions about patient populations including medical and demographic information, clinical processes, and department statistics. Leaf can produce results that are identifiable or de-identified data sets. In order to access identified data, you will first have to obtain IRB approval for human subjects research.

Service Partners

University of Washington Health Sciences Library
ITHS Institute of Translational Health Sciences
UW Medicine Information Technology Services

Accessing Leaf

Due to its direct access to the university health data system, Leaf is currently only available to investigators and research teams affiliated with UW Medicine who have an AMC account.

  1. Navigate to the UW Medicine Analytics site and click “Request Access” on the right-hand side.
  2. Select “Leaf Power User” in the options under “Access Needed” and submit access request.
  3. Under “Manager”, select an appropriate clinical or administrative supervisor. This person will receive an email with instructions on how to confirm your request.

Training Resources

UW Medicine's Data Access Policy training, offered via the online learning management system, is required for all Leaf users. It can be found by searching “data access” in the search box in the upper left.

You can also access the training modules by logging into AMC to the UW Medicine Analytics site.


Questions and Consults

For further guidance and support, please send an email to: biaccess@uw.edu.

For investigators not affiliated with UW Medicine, please submit a consultation service request to the BMI team to learn about cohort discovery and obtaining data.

UW School of Medicine Bio Informatics and Medical Education
ITHS Institute of Translational Health Sciences
University of Washington Health Sciences Library
U.S. National Library of Medicine - Pacific Northwest Region
UW Medicine Information Technology Services

This service is available to researchers in Washington, Wyoming, Alaska, Montana, and Idaho.