Legion Health

Legion Health is a full-stack, AI-native telepsychiatry clinic founded in 2021 and backed by Y Combinator. The company employs its own clinicians, holds its own insurance contracts, and uses large language models to automate workflows across care delivery - including scheduling, billing, clinical decision support and personalised follow-up. It delivers medication management for conditions such as ADHD, anxiety and depression, with visits often priced under $30.

The engineering work spans several technical domains: large language models, AI-native care delivery automation, clinical decision support, scheduling and billing automation, telepsychiatry and healthcare AI. The stated approach is practical and instrumented - start with world-class clinicians, measure the process, and automate it step by step, with an aim of building what the founders describe as the practical path to the AI doctor.

Legion Health reports more than $3m in annual recurring revenue. It began with a B2B mental health staffing offering and moved to its current full-stack clinic model after ChatGPT's arrival. The company operates in Texas and has plans for national expansion.

It was founded by three Princeton roommates - Yash Patel, Daniel Wilson and Arthur MacWaters - motivated by family experiences with gaps in mental health care. The founders' backgrounds include healthcare policy work at the Congressional Budget Office, as well as roles at Microsoft and McKinsey. The company frames its mission as making psychiatric care available to everyone with insurance.