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Fortune Exclusive: Bunkerhill Health raises $55M to put AI agents to work inside hospitals
Healthcare has never been short on great ideas. What is new is the ability to turn them into reality at the pace patients need.
Healthcare is full of brilliant ideas. Every day, clinical teams envision new ways to improve patient care while staff think of new ways to bend the cost curve and drive operational efficiency. The industry has never suffered from a lack of imagination. The real challenge has simply been translating those great ideas into reality.
Imagine a world where the distance between a clinical breakthrough and everyday patient impact is instantly closed. Picture what becomes possible when that part gets easy:
None of this is wishful thinking. It is what happens when a health system can turn its ideas into reality quickly and at scale.
For years, getting a new idea into practice in healthcare meant taking one of two routes. Build it in-house, which works until the work outgrows the hours a team has. Or bring in a tool made for that single problem, which may work well for that problem, though a health system rarely has only one.
Both moved care forward. Neither was designed to carry a hundred ideas at once. The missing piece was the layer between them, the connective tissue that turns clinical expertise into action at scale.
That layer is what we built. We call it Carebricks.
Health systems bring what only they can: the clinical judgment and the context for what needs solving. Carebricks brings the execution, running the work as AI agents that reason across enormous amounts of data, take real action, and grow more capable as they work together. One platform and endless possibilities. A straight line from idea to reality, with no new company to find and no new contract to sign each time.
AI agents run in production on Carebricks at over 100 hospitals nationwide, spanning patient access, care-gap closure, registries, prior authorization, and the daily work that keeps a hospital moving. The ideas are the health systems' own. The platform is what lets them deliver each one at full scale, aimed wherever a system needs it most.
The sickest patients, seen first. A department chair at a health system we work with noticed his nephrology queue ran on a first-come, first-served basis. The healthier patients who could afford to wait were filling the appointments, while the sickest deteriorated into emergencies or left for a system that could see them sooner. His idea was simple: constantly evaluate the whole queue and reorder patients by urgency. An agent made it real, ranking every referral by severity, moving the sickest to the front, and routing telemedicine and primary-care cases to the right place. Wait times to see a specialist fell by more than half. For a patient with failing kidneys, that is the difference between treating it in time and waiting until it is too late.
A backlog cleared in months. Actionable findings show up in imaging reports all the time, and just as often, nothing happens next. One of our health system customers refused to accept that. They stood up a dedicated clinic to chase each one down: a ten-person team of advanced practice providers reviewing each chart and arranging the right follow-up. It was a genuinely great idea. But managing the manual review process across dozens of hospitals buried them, and a backlog formed: roughly 60,000 patients deep and years long. The clinician leading the clinic saw exactly where it was stuck: in the slow work of combing years of dense records for every patient, the kind of task AI can do quickly and consistently using the criteria his team had already set. He put AI agents on the first pass. In less than six months, the backlog was clear, and the number of patient visits to their actionable findings clinic increased by 44 percent.
Two systems, two different problems, the same story underneath: someone who saw exactly what their patients needed, equipped with a way to make it real at scale. Every health system is full of ideas like these, waiting for the same path forward.
Today, we are announcing our Series B, which brings our total funding raised to $55 million. We are backed by Khosla Ventures and Sequoia Capital, firms that have long stood behind companies that reshape entire industries. They joined for the reason we sought them out: healthcare needs a platform that solves problems end to end, not one workflow at a time.
This capital lets us deepen our partnerships, scale Carebricks, and give more health systems a way to move from early pilots to capability that runs across the whole enterprise. The faster a good idea becomes real, and the more places it can run, the more patients feel the difference. To the leaders who have trusted us with medicine's hardest problems: this milestone is as much yours as ours.
Since starting this journey, we’ve learned that all of this work compounds. Turn one idea into reality, and the next comes faster, and the one after that faster still. Close the distance between knowing and doing, and providers get back the two things they never have enough of: the time and the clarity to care for people.
That is the promise of this moment. In a world where any good idea can become real, everything else you hear about, every new use case, every frontier problem, stops being another company someone has to build. It becomes one more thing a health system can do today.
That is the world we are building. To our team, our investors, and the leaders who trust us every day: thank you. It is a privilege to build it with you.