Zus Health, the connected-record company founded by former athenahealth chief executive Jonathan Bush, has raised $33M in Series B funding. Drive Capital led the round, with Sanofi Ventures, HealthX Ventures and Alumni Ventures joining existing backers Andreessen Horowitz, F-Prime, Maverick Ventures and JAZZ Venture Partners. Total capital now tops $100M.
The Boston company is not selling a new model. It is selling the plumbing that lets hospitals stop building it.
Three layers under one patient chart
The Zus Aggregated Profile normalizes demographic, diagnostic and procedural fragments from separate sources into a single longitudinal record. Above that sits a network layer that queries CommonWell, Carequality, pharmacy feeds, admission-discharge-transfer notifications and commercial labs without requiring each health system to negotiate its own interfaces.
The third layer drops those records into workflows: pre-visit preparation, care-transition tracking, risk adjustment, HEDIS quality gap closure and population outreach. A component called Generated Patient Summaries uses AI to compress a sprawling outside chart into a source-linked brief a clinician can scan before an encounter.
Scale numbers that matter to buyers
The company says it handled more than 110 million networked transactions in August 2026 alone and produced 39 million evidence citations year to date. Those figures matter more than the raise itself, because interoperability vendors are judged on whether the query actually returns a usable answer at volume.
Bush’s pitch is that digitizing healthcare created records without making them portable. The new money funds expansion of the platform, the national exchange network and the clinical workflow products built on top.
The competitive field is crowded with record aggregators and payer-facing data vendors. Zus is betting that the layer patients and applications both touch, rather than the chart itself, is where the durable position sits.
