The coronavirus crisis has rushed the transition to telemedicine, and many health-care providers say there is no going back. They are finding that televisits can be more efficient than in-office visits for many types of medical issues, from postsurgical patients worried about infected incisions to rural physical-therapy patients who lack access to outpatient clinics.

“It is going to change the way we practice medicine,” says Jeffrey Geller, chief of orthopedic surgery at NewYork-Presbyterian Lawrence Hospital and chief of...