As part of WebMedLit's continuing efforts to promote high quality health care, we have provided a list of board-certified physicians across the United States. Why is board-certification important? While it isn't a requirement to be board-certified to practice medicine, about 90% are certified, being certified by a medical board demonstrates to potential patients that the doctor in question adheres to the standards set forth by their particular industry. To learn more about board certication visit the American Board of Medical Specialties.