worse. >> i'm extremely worse. and i'm in an extreme amount of pain. >> the people who will fall for these fake doctors usually are extremely vulnerable. it is that persona, that ability to gain a patient's trust, that respect, that white coat, and that ability to smile and get that person to talk to them and trust them that allows the fraud to continue. >> the federation of state medical boards lists hundreds of imposters who have masqueraded as doctors in america. >> miss mace. >> unless it's leonardo dicaprio examining you, go online and make sure your doctor is a licensed physician in your state. at number 23, treating the wrong patient. carrie higuera is bleeding three months into her pregnancy. she fears she's about to lose her unborn baby to a miscarriage. she's waiting in a hospital room when a nurse comes in and asks