** FILE ** Dr. Pedro Jose Greer examines Medicaid patient Kenneth Caldwell, 50, in his office at Mercy Hospital in Miami, where the gastroenterologist has made a career of offering treatment without regard to a patient's ability to pay. (AP Photo)

** FILE ** Dr. Pedro Jose Greer examines Medicaid patient Kenneth Caldwell, 50, in his office at Mercy Hospital in Miami, where the gastroenterologist has made a career of offering treatment without regard to a patient's ability to pay. (AP Photo)