內科學
Internal medicine physicians, or internists, train three additional years after medical school leading to board certification in internal medicine. Pediatricians train three additional years after medical school to board-certify in pediatrics. Med-peds physicians train for four years and can be "double-boarded" for both these specialties. Since there is frequent crossover of disease and treatment between children and adults, med-peds training consolidates these two specialties into four years. The performance of med-peds physicians on the two national board exams is equal to their one-specialty (specific internist or pediatrician) counterparts.