Internal medicine
Internal medicine-pediatrics, or med-peds, is a medical specialty in which doctors train to be board certified in both internal medicine and pediatrics. A residency program in med-peds is four years in length, contrasted with three years for internal medicine or pediatrics alone. Upon completion of a med-peds residency, a doctor can practice in the areas of internal medicine, pediatrics or can complete a fellowship program to further specialize in an internal medicine or pediatrics sub-field.