Just as Pediatrics is medical care for children, Internal Medicine is medical care for adults. Doctors like Dr. Griffin and Dr. Khera, who want to specialize in taking care of adults, spend three years in training after medical school. After these three years of learning about adult medical problems—like high blood pressure, high cholesterol, osteoporosis, arthritis and depression—they become Internal Medicine doctors.

Family Practice doctors (FPs) and General Practitioners (GPs) must learn about everything from delivering babies to performing appendectomies during their training. Therefore, they only spend about eight to ten months on adult diseases. Internal Medicine doctors can provide a higher level of service and help with more serious adult problems for the same cost as a GP or FP.

Another name for Internal Medicine doctors is "Internists." This can be confusing because Internists deal with the entire adult not just the "internals."