Bunkerhill Secures $55M Funding to Expand Agentic AI Solutions for Health Systems

Bunkerhill Health has raised $55 million to scale its agentic AI platform, Carebricks. The closing of the company's Series B round, announced today, folds in continued participation from Sequoia Capital, Felicis, Optum Ventures, and Y Combinator.

However, a funding total doesn't answer the key question any hospital executive wants to know about healthcare AI: does the software run inside a working hospital?

That question is among the reasons why Khosla Ventures put its name on this deal. Healthcare organisations have put no shortage of funding behind machine learning pilots that perform well in a research setting — and then never touch a live patient chart.

Bunkerhill's argument to investors, and to the health systems already paying for it, is that Carebricks closes the space between a model that works in a sandbox and one that runs against live clinical data at institutional scale.

💡 The Problem: A $5.3 Trillion System Under Strain

The backdrop is a spending number and a staffing problem. US healthcare spending hit $5.3 trillion in 2024, according to the Centers for Medicare & Medicaid Services, and labour shortages continue to strain providers nationwide.

Bunkerhill frames the opportunity around a gap between what health systems want to do for patients and what their staff have time to execute. Decades of investment went into documentation systems meant to ease the burden on clinicians. Bunkerhill's bet is that the next round of technology spending goes toward software that acts on ideas clinicians already have, rather than just recording them.

"Medicine has advanced faster than our healthcare system's ability to operationalise it. Every leading health system has more opportunities to improve patient outcomes than its workforce has capacity to address. We believe AI agents can help them turn more of those ideas into reality."

— Nishith Khandwala, Co-Founder & CEO, Bunkerhill Health

🏥 What Carebricks Actually Does

Carebricks lets hospitals build their own agents rather than buying a fixed product off the shelf. Use cases span a wide range:

• 🫀 Cardiology imaging review — flags patients with early signs of heart disease for follow-up care
• 📋 Prior authorisations — automates approval workflows to reduce administrative delays
• 🗂️ Registry data management — keeps clinical records current without manual effort
• 🏢 Administrative operations — handles back-office tasks that consume staff hours every week

Current enterprise customers include Cleveland Clinic, the University of Texas Medical Branch (UTMB), and Intermountain Health.

"The bottleneck in healthcare AI was never the technology — it was getting a health system to actually run it. Bunkerhill closed that gap. They made it much, much easier to adopt AI and already have traction inside critical health systems that would take most companies years to earn."

— Vinod Khosla, Founder, Khosla Ventures

📊 Twenty AI Agents Running Inside One Hospital System

UTMB offers the clearest picture of what "running it" looks like once the pilot label comes off. The system now has more than 20 agents live on Carebricks, spanning clinical care, operations, and administration, according to Dr. Peter McCaffrey, UTMB's Chief AI Officer.

⚠️ Note: This is a single case, not a controlled trial. Bunkerhill has published no data on false positive rates or broader population performance over time.

Other reported results at UTMB — sourced from Bunkerhill and the health system, not independent audit — include:

These are health system-reported operational results from live production use — not synthetic benchmark scores. That matters. It also means the numbers reflect one institution's data conditions and staffing setup, not a guarantee that another hospital will see the same outcomes.

"We've already seen tremendous impact on patient care, and we're only at the beginning of what becomes possible when a health system can operate with agentic AI at this scale."

— Dr. Peter McCaffrey, Chief AI Officer, UTMB

🔍 What the New Funding Will Address

Bunkerhill says it will use the new capital to expand Carebricks into a wider range of clinical and operational use cases, while building out governance, monitoring, and safeguards.

UTMB's 20-agent footprint gives Bunkerhill a reference case few competitors can currently match. Whether that number holds up as a signal for the rest of the industry depends on how UTMB — and the other systems now running Carebricks — handle the accountability frameworks that scale inevitably demands.