For centuries, medicine has balanced science with experience and intuition. Two patients with the same diagnosis may receive the same treatment, yet their outcomes can differ dramatically. That has long been one of medicine’s most frustrating mysteries, and one of its biggest challenges. Today, artificial intelligence (AI) is beginning to close this gap. What was once a vision of the future is now entering clinics, laboratories, and even operating rooms, redefining how care is delivered and how doctors and patients interact.