Bunkerhill Health Secures $55M to Scale Carebricks: The AI Agent Infrastructure Transforming Healthcare Delivery

Bunkerhill Health, a healthcare artificial intelligence infrastructure company, has secured $55 million in Series B funding to expand its Carebricks platform, which allows health systems to develop and deploy autonomous AI agents. The funding round was led by Khosla Ventures, with continued participation from investors including Sequoia Capital, Felicis, Optum Ventures, and Y Combinator. This latest investment brings the company’s total funding across its Seed, Series A, and Series B rounds to $55 million, according to company disclosures.

The Carebricks platform functions as a foundational layer for hospitals to build and deploy their own AI agents. Rather than relying on a patchwork of vendor-specific tools, health systems can translate their internal clinical protocols into active agents. These agents monitor unstructured data within the electronic health record and other hospital systems to perform tasks such as triage, task routing, and clinical documentation assistance.

The platform is currently utilized by several major academic and regional health systems, including the Cleveland Clinic, Intermountain Health, and the University of Texas Medical Branch (UTMB). Vinod Khosla, founder of Khosla Ventures, noted that the company’s success stems from its ability to bridge the implementation gap. “The bottleneck in healthcare AI was never the technology, it was getting a health system to actually run it,” Khosla said. “Bunkerhill closed that gap.”

Operational Impact at the University of Texas Medical Branch

The practical application of these AI agents is most visible at the University of Texas Medical Branch (UTMB), where the system has been deployed at an institutional scale. Under the guidance of Chief AI Officer Dr. Peter McCaffrey, UTMB has integrated more than 20 AI agents into its daily operations. These agents are designed to automate high-friction administrative and clinical tasks, thereby expanding the capacity of the existing workforce.

The impact of these deployments includes significant improvements in patient care metrics:

• Diagnostic Triage: A coronary calcium detection agent, utilizing an FDA-cleared algorithm, identified a patient at risk of a cardiac event. The agent automatically alerted the cardiology department, facilitating an emergency triple bypass procedure.
• Specialist Wait Times: A nephrology triage agent was deployed to prioritize patient consultations based on medical severity. This system reduced average wait times for nephrology specialists by more than 50%.
• Incidental Findings: A lung nodule tracking agent monitors CT scans for incidental findings. By automating the identification and follow-up sequencing for these patients, the system addresses urgent cases 80% faster than previous manual workflows.

The Shift Toward Autonomous Clinical Reasoning

The distinction between traditional AI in healthcare and the “agentic” model supported by Bunkerhill lies in the capability for autonomous reasoning and action. While earlier iterations of clinical AI were largely confined to passive documentation assistance, the Carebricks system is intended to operate as a disciplined, automated extension of the hospital’s own clinical team. By allowing health systems to define their own protocols, the platform aims to ensure that AI behavior remains consistent with the specific standards of care established by each institution.

Nishith Khandwala, co-founder and CEO of Bunkerhill Health, emphasized that the goal is to address the capacity constraints inherent in modern healthcare systems. “Every leading health system has more opportunities to improve patient outcomes than its workforce has capacity to address,” Khandwala stated. “We believe AI agents can help them turn more of those ideas into reality.”

Future Implementation and Regulatory Considerations

Food and Drug Administration (FDA).

As hospitals continue to navigate the complexities of digital transformation, the success of platforms like Carebricks will be measured by their ability to maintain safety while providing measurable improvements in patient outcomes and operational efficiency.