Current guideline. Reaffirmed on July 16, 2016. Endorsed by the American Football Coaches Association, the Child Neurology Society, the National Academy of Neuropsychology, the National Association of Emergency Medical Service Physicians, the National Association of School Psychologists, the National Athletic Trainers Association, the National Football League Players Association, the National High School Coaches Association, and the Neurocritical Care Society. The authors gratefully acknowledge external advisory committee members Dr. John DiFiori, Dr. Paul McCrory, Dr. Ann McKee, and Dr. Margot Putukian for their participation in the development of this guideline. Download the AAN’s Concussion Quick Check app to your smartphone or tablet to find a neurologist near you and consult concussion laws in your state.