Doctors

Medical consultation via video is going mainstream. UnitedHealthcare says it will cover doctors' visits by live video on smartphones, tablets and computers. Will people overuse it and boost costs?

Doctors, it turns out, often don't follow evidence-based guidelines. One result? Unnecessary tests. Scientists who study this contrariness think they know why.

Medicine has changed a lot in the past 100 years. But medical training has stayed much the same. Many schools are now retooling — focusing on teamwork — to train a different kind of doctor.

Americans spend billions of dollars every year on annual physicals. But there's little evidence that a yearly checkup helps healthy adults. Some doctors are telling patients to skip it.