Critical-care medicine is a subspecialty of Internal Medicine. After a doctor completes medical school and is licensed to practice medicine, the physician may pursue a rigorous three-year training program in Internal Medicine. After passing an examination and completing the requirements, the doctor is Board Certified in Internal Medicine—also called an Internist. This is different from an intern, who is a doctor who has completed medical school and is in the first year of residency training.
To become certified in the subspecialty of critical-care medicine, Board-Certified Internists must complete an additional two years of fellowship training in critical care medicine. These specialists manage the care of critically ill patients in intensive-care units. They are skilled in: