ChatGPT is now plugged into the medical records of 325 million patients

Key points

• OpenAI has integrated ChatGPT Health with Epic, an electronic health record (EHR) system that holds data for more than 325 million patients.
• Clinicians get read-only access: the AI can read and summarise records but cannot write anything back.
• OpenAI collected responses from more than 4,300 physicians across 27 clinical tasks and found 99.1% were rated safe.
• A new Healthcare Public Data plugin pulls information from ClinicalTrials.gov, RxNorm, DailyMed and PubMed to help staff check drug details and trial eligibility.
• Two lawsuits against OpenAI allege that ChatGPT gave harmful medical advice to individual users.

For most people, a doctor's appointment is a blur of old test results and half-remembered medication names. OpenAI wants to fix that, at least from the clinician's side.

The company announced this week that ChatGPT Health now connects directly to Epic, an electronic health record system, the software hospitals use to store everything from appointment notes to lab results. Epic holds records for more than 325 million patients, the largest such system in the United States.

What can doctors actually do with this?

Clinicians can pull up a patient's history and specialist notes, then ask ChatGPT to summarize them in plain language. In some hospitals, they can do all of this without leaving the chart screen.

The AI builds pre-visit summaries, flags shifts in a patient's condition over time, and helps prepare handoff notes, the brief a nurse or doctor writes when passing care to the next shift. OpenAI is clear the integration is read-only: it reads records, it doesn't write them. OpenAI also launched a Healthcare Public Data plugin that fetches information from ClinicalTrials.gov (a database of medical research studies), RxNorm (a standard drug-name reference), DailyMed (official drug label information) and PubMed (a library of medical research papers). Clinicians can check whether a patient might qualify for a clinical trial or verify medication details without switching screens.

We first covered Epic's role in AI-assisted clinical workflows on 1 September 2026, and this move by OpenAI is a significant step beyond what we reported then: that earlier integration was a documentation assistant, not a full records query layer.

Should patients be worried?

OpenAI says 99.1% of the AI's responses were rated safe across 27 types of clinical task. That figure sounds reassuring, but the company itself acknowledges AI isn't suitable for diagnosis or treatment, and even a small error rate in medicine can cause real harm.

The timing is uncomfortable. Just days before this announcement, a Florida pastor filed a lawsuit claiming ChatGPT gave him a near-fatal recommendation. In May, the family of another user sued OpenAI, alleging the chatbot gave dangerous advice about medication dosage. OpenAI hasn't commented publicly on the specifics of either case. Our 23 July story on the consumer rollout of ChatGPT Health noted that the first lawsuit landed one day before that launch. The lawsuits are piling up alongside the product announcements.

Last month OpenAI opened ChatGPT Health to all US consumers, and people already send 300 million health-related questions to ChatGPT every week.

What happens next?

Organisations that sign a Business Associate Agreement, a legal contract required under US health-privacy law, can now use ChatGPT for work tasks, coding tools and app connectors inside their systems.

If your hospital uses Epic, your doctor may already have access to these tools. The safeguard worth knowing: the AI reads your records to help your clinician prepare, but it cannot change what's written there.