"There've been many technological innovations in health care in the last few decades, but this is by far the fastest adoption of anything I've seen," said Dr. Andrew Olson, a physician and professor at the University of Minnesota who has studied artificial intelligence in health care. One study testing OpenAI's ChatGPT Health model found it underdiagnosed emergency cases about half the time. Dr. Olson shares the concern that patients might blindly trust tools not designed for health care. But other patients are embracing AI to make health care decisions. St. Paul resident Bryan Hayes, 62, has accumulated a lot of health care data over nearly a decade of dabbling in the DIY longevity movement known as biohacking.