Arbiter, a six-month-old healthcare AI startup founded by former Eli Lilly Executive and Thirty Madison President Michelle Carnahan, has raised $52 million in seed funding at a $400 million valuation. The company secured the round entirely from family offices, including TriEdge Investments, MFO Ventures, and private equity firm WindRose Health Investors. Arbiter’s platform connects patient data to automate administrative tasks for clinicians and health plans, and its technology is already live with more than 1,000 providers. Carnahan said this funding model offers strategic benefits, noting, “This gives us not only a knowledge advantage, but a distribution advantage in partnerships that would take years to develop.”
Arbiter accelerated its entry into the market by acquiring a data platform from SecondWave Delivery Systems, enabling its AI agents to handle tasks such as scheduling and patient follow-ups. The company plans to launch a unified “operating spine” next year with a national payer and provider network. Carnahan described Arbiter’s role by saying, “Everyone keeps building new instruments for the orchestra. There's a prior auth tool here, an analytics dashboard there, but no one's building the conductor. Arbiter is that conductor.”
