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Table of Contents
ChatEHR is a vendor-agnostic, internally governed platform that places the full longitudinal patient record—up to twenty million tokens—directly into a model's context window in real time. It is accessible both through an interface embedded in the EHR (40% usage) and through APIs (60% usage) that automate high-volume rote tasks. This ArXiv submission describes the usage in the first 3 months of launch.
User Interface
When users open a ChatEHR tab in the EHR, they first see a welcome menu (left) to select which patient data to load into context for the LLM, by selecting data sources and a time range. After launching ChatEHR, they see a chat window (right) where they can submit queries and receive responses, provide feedback (thumbs up/down), or start a new session by returning to the welcome menu.
Testimonials
The UI pilot concluded in June 2025, with a total of 150 users, 3000 chat sessions, and dozens of testimonials (below) and led to a full enterprise roll out in Sept 2025.
News coverage
Timeline
- Apr 06, 2023 - Data Science team sets up SHCOpenAISandbox at http://goto.stanford.edu/shcopenaisandbox
- Aug - 2023 - Work begins on setting up securegpt.stanfordhealthcare.org
- Nov 01, 2023 - chatEHR is conceptualized at TDS while building https://securegpt.stanfordhealthcare.org/
- Nov 08, 2023 - A working demo is created by a student as an AI-CARE project.
- Jan 29, 2024 - SecureGPT, launched for Stanford School of Medicine and Stanford Health Care
- Jan - March, 2024 - Proof of concept work in ENT referral and Nursing summarization using SecureGPT.
- May - 2024 - the concept of using an LLM in context with a single patient record is fleshed out
- June 10, 2024 - second demo and prototype
- June 19, 2024 - presentation to Data Science Exec Committee, and permission to build
- July 2024 - First automation use-case implemented to automate chart review for inter-facility transfers
- Aug 15, 2024 - Backend architecture overhaul
- Aug 23, 2024 - Alpha testers get access to the UI
- Jan - 2025 - First user gets access for UI
- June 5, 2025 - Announcement of the pilot, with 30+ active users
- July 2, 2025 - Ramp up to 89 users (clinicians, nurses, residents, fellows, PAs, care managers, MD students)
- Aug 1, 2025 - Pilot ramped up to ~150 users, and closed new enrollment into the pilot
- Sept 9, 2025 - Broad roll out to all providers, and APPs.
