Legion Health

Legion Health is a full-stack, AI-native telepsychiatry clinic founded in 2021 by three Princeton roommates - Yash Patel, Daniel Wilson and Arthur MacWaters - and backed by Y Combinator. The company employs its own clinicians, holds its own insurance contracts, and uses large language models to automate scheduling, billing, clinical decision support and personalised follow-up across its care delivery workflow. It reports ARR of over $3m and delivers medication management for conditions including ADHD, anxiety and depression, with visits often costing under $30.

The engineering work spans large language models, healthcare automation, clinical decision support and EHR workflow automation. The stated operating model is to start with world-class clinicians, instrument everything, and automate the workflow step by step - an approach the company frames as a practical path to the AI doctor, with real care delivered up front and automation running in the background. The company began with a B2B psychiatric staffing offering and pivoted to the full-stack AI clinic after ChatGPT's arrival.

Legion Health currently operates in Texas, with national expansion planned across the United States. Its mission is to make psychiatric care available to everyone with insurance; founder backgrounds include the Congressional Budget Office's healthcare policy work, Microsoft and McKinsey.