Your doctor is probably using AI, even if they haven’t told you about it. Over the past two years, medical providers across America have quietly embraced a new AI tool called OpenEvidence to help them make clinical decisions, brush up on medical knowledge and even prepare for their licensing exams. The service, a sort of chatbot for doctors, was used by about 65% of U.S. doctors across almost 27 million clinical encounters in April alone, the company told NBC News. “Everyone is using it,” said Dr. Anupam Jena, an internal medicine physician at Massachusetts General Hospital in Boston and a professor of healthcare policy at Harvard. “Its growth really has been exponential.” NBC News spoke with over two dozen doctors, hospital administrators, medical students and healthcare researchers from Hawaii to Maine to explore the rise of OpenEvidence. Each individual said they either used it regularly themselves or knew someone who did. Almost two-thirds of physicians — or roughly 650,000 doctors — in the U.S.…