certainly can't remember when doctors made house calls. >> but these days with so many insurance company restrictions, and overloaded doctors' schedules it can take weeks to see your physician. >> now a new app bringing a doctor right to your smart phone. making this our "favorite story of the day." here is abc's rebecca jarvis. >> could you show me how hard lily got hit? >> head bumped, you know. >> how are you feeling? >> fine. >> so is lily. >> reporter: like in this episode of "modern family" doctor's visits aren't always that pleasant. now the doctor is in 24/7, and you didn't have to leave home. thanks to a service, healthtap prime. you can have a 30 minute consultation with your doctor any time over your device. using your smart phone camera, ask one of 62,000 doctors to diagnose an illness and write you a prescription even in the middle of the night.