Legion Health

HealthAratus is the institutional standard for medical AI validation in the United States. The MOAT Protocol aggregates ground-truth performance signals from a credentialed network of 60,000 verified U.S. users, delivering real-world evidence that health systems, payers, and procurement leaders use to evaluate AI tools before deployment.

The HealthAratus Score (HAS) is a composite reputation metric computed from four weighted factors: Evidence, Deployment, User Experience and Innovation. Scores are EWMA-smoothed daily and capped to prevent intra-day volatility.