News

Oracle Health's Cloud-Native EHR Rebuild Faces Its Proving Year

• By John K. Waters
• 07/29/2026

Oracle Health is in the middle of a bet that will either restore confidence in its electronic health record business or confirm three years of eroding market share. The company has spent the past two years rebuilding its EHR from scratch on Oracle Cloud Infrastructure, betting that a cloud-native, agentic AI architecture can do what incremental updates to the old Cerner Millennium platform could not.

The company is not being subtle about the contrast it wants drawn. "While our competitors seem content with bolting features onto antiquated technology, we took on the enormous and highly complex challenge of creating an entirely new EHR, built in the cloud for the agentic AI era," Seema Verma, executive vice president and general manager of Oracle Health and Life Sciences, said when the system launched.

Independent researchers are watching to see whether that architecture can reverse a market trend running the opposite direction. KLAS Research, which surveys health system buyers and tracks hospital contract data, has called 2026 a "pivotal proofpoint" year for Oracle Health as the new platform moves from ambulatory settings into acute care hospitals.

Built on OCI, Not Cerner
Oracle acquired Cerner in 2022 for more than 28 billion dollars and rebranded the business Oracle Health. Rather than update Millennium, the company chose to design a new EHR independently of the acquired codebase, built natively on Oracle Cloud Infrastructure. The new system launched for ambulatory providers in August 2025, pending final regulatory approvals, and Oracle said at the time that acute care functionality would follow in 2026.

The system's most visible feature is voice interaction. Clinicians can ask the EHR for a patient's recent lab results or current medications instead of navigating through screens and clicks. Oracle says the underlying model was trained on clinical concepts, including conditions, lab results, medications, and care pathways, so its embedded AI agents interpret clinical meaning rather than parsing text alone. The system builds on Oracle's Clinical AI Agent, a generative AI and voice assistant tool that reached general availability roughly a year before the full EHR launch and remains embedded within it.

Oracle has also said the platform is designed to stay open at the AI layer. Customers can extend Oracle's own agents, build custom ones, or integrate third-party models, according to the company, rather than being limited to a closed set of tools.

In December 2025, Verma pointed to a concrete regulatory milestone: certification of the AI-native EHR by the HHS Assistant Secretary for Technology Policy and the Office of the National Coordinator for Health Information Technology. She described the moment as comparable to the shift from early smartphones to the first iPhone. Oracle also reported that nearly 10,000 clinicians across dozens of specialties were using the Clinical AI Agent to help with documentation and patient summaries, according to the company.

A Shrinking Base to Win Back
The rebuild is happening against a backdrop of sustained losses. KLAS's "US Acute Care EHR Market Share 2026" report, which examined hospital contract activity from January through December 2025, found that Oracle Health lost 56 acute care hospitals over the year and now holds 21.9 percent of hospitals and 20.4 percent of beds, down from 22.9 percent of hospitals the year before. It marked the vendor's third consecutive year of declining market share, according to KLAS.

Epic, Oracle Health's dominant rival, moved the other direction, adding 77 acute care hospitals in 2025 to reach 43.7 percent of hospitals and 56.9 percent of beds. KLAS noted that many of those wins came from organizations replacing Oracle Health, citing easier regional data exchange and platform stability as deciding factors. Looking back to 2021, KLAS found Epic has gained a net 568 hospitals while Oracle Health has lost 173 over the same stretch.

Customer sentiment tracked the same direction. In KLAS's 2026 Best in KLAS survey, the legacy Millennium platform scored lowest among large, midsize, and small organizations. Roughly 30 percent of surveyed Oracle Health customers said the vendor is no longer part of their long-term plans. Another 35 percent fell into a category KLAS classified as vulnerable, meaning they are dissatisfied, would not buy the platform again, or remain undecided about staying. That left only about a third of customers firmly committed to the vendor, according to KLAS's sample.

KLAS also linked the broader market slowdown partly to Oracle Health customers themselves. The research firm found that hospital EHR purchasing decisions overall fell 40 percent from 2024 levels and nearly 50 percent from 2023, a drop it attributed to government policy uncertainty, growing hospital investment in operational AI, and hesitation among Oracle Health customers waiting for clarity on the new platform before committing to stay or switch.

What Counts as Proof
KLAS framed the stakes plainly: the new EHR's reception in 2026 will shape whether Oracle Health can stabilize both its installed base and its standing with hospitals considering a switch. That framing sets a clear test for the acute care rollout. Ambulatory customers have already had months to evaluate the voice interface and the Clinical AI Agent. Hospitals, where Oracle Health's market position is weakest and where KLAS found the most customer defections, have not.

Oracle has additional infrastructure arguments it is likely to lean on as that rollout proceeds. Verma has also pointed to Oracle Cloud Infrastructure's security posture, which the company says protects sensitive workloads for large enterprises and government agencies, as a selling point for hospitals weighing where to run clinical data. She has also framed interoperability and reducing friction between payers and providers, a challenge she has emphasized since her time leading the Centers for Medicare and Medicaid Services, as an area where AI-supported EHR workflows could streamline prior authorization.

Whether hospitals find those arguments persuasive will not be clear until KLAS and other researchers gather live-site data from acute care deployments later in 2026. For now, Oracle Health's cloud-native rebuild remains a company making a technical case for its future against a customer base that, according to independent research, has grown considerably less patient.