When Eric Sosman called his doctor's office to schedule a checkup a year ago, he was given a choice: wait about six weeks for a conventional appointment, or about half that time for a group visit.

Mr. Sosman, age 61, opted to share his appointment. Now, he plans to stick with group visits for his routine medical needs, at least as long as he doesn't develop a condition he wouldn't feel comfortable talking about in front of other patients. "I find them interesting and educational," the Newton, Mass., resident says of his appointments.

...