Beth Hanlon grabs the stethoscope she keeps roped around the headrest of her car's passenger seat and strides through the double doors of a Salt Lake City nursing home, her first "house call" of the day. It's not every day that Hanlon makes house calls. But she's making more exceptions these days, now that she's seeing a fraction—about 350—of the 2,500 patients she had a year ago. In late December 2011, Hanlon and another internist at Alpine Medical Group, Yong Hui Ahn, joined a growing number of doctors embracing "concierge" health care.