Legion Health

Legion Health is a Y Combinator-backed (S21) telepsychiatry company building AI-native mental health care. It runs a full-stack virtual psychiatry practice: it employs its own board-certified providers, holds its own insurance contracts, and acquires patients directly, using large language models and AI agents across scheduling, billing, intake and clinical decision support. Patients get virtual appointments for conditions including ADHD, anxiety, depression, bipolar disorder, PTSD and insomnia, with medication management and e-prescribing, covered by most major insurance plans. The company says it has received regulatory authorization for AI-led renewals of psychiatric maintenance medications, launched in Utah.

Rather than selling software to clinics, Legion owns the whole stack — providers, payer contracts and patient acquisition — and automates the administrative layer with LLM agents, which it says lets it deliver insurance-covered psychiatric visits at low patient cost and within days rather than weeks.