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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.

Leaf is supported and administered in partnership with the UW Medicine analytics team.

Important Note

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

Potential uses

Cohort Discovery

Determine if there are enough patients within the UW hospital system who have a given set of conditions which match recruitment criteria. This can help with planning and designing an existing study or submitting a grant proposal.


Quickly pull departmental numbers, such as, “how many patients were seen last month?”

Chart Abstraction

Generate an identified or de-identified dataset for research or quality improvement purposes. Note: viewing identified data requires IRB approval.

Accessing Leaf

Accessing Leaf

Currently, any investigator who has access to the AMC system can request access to Leaf.

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

  • AMC\yourusername
  • yourpassword

Prerequisites prior to approval

Before this request is approved, you will need to complete UW Medicine Data Access Policy training via the online learning management system. Search for “data access” in the search box in the upper left. The Data Access Policy Training should be the only module in this category.

Within one business day of completing this training, you will receive an email confirming that you have been granted access. This email will also include instructions for how to access training materials.

Identified versus de-identified data

Leaf defaults to providing data in de-identified mode, which removes all patient identifiers and shifts dates of service or other recognizable factors. If you have an approved IRB, however, Leaf can also display identified information relevant to your study.

Training and Orientation

Training & Orientation

To learn more about Leaf, including how this application can help support research, getting started and more visit:

Contact the Leaf Team

Contact the Leaf Team

  • For further guidance and support for AMC Users, please email
  • 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.
BMI Consulting Services

Request BMI Services

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