Dr. Callahan is board certified in primary care/sports medicine and is an Associate Professor in the Department of Medicine at Weill Cornell Medical College. Currently, she serves as Chief Medical Officer and Senior Vice President of Player Care at Madison Square Garden Sports, where she oversees the care of the Knicks (NBA), Rangers (NHL), Liberty (WNBA), Westchester Knicks (NBA D-League) and the Hartford Wolf Pack (AHL). In 2013 she was elected Secretary/Treasurer of the NBA Team Physicians Association and became Vice President in 2015. In spring of 2014, she was awarded the honor of NBA Team Physician of the Year. She was also named a team physician for the 2014-16 USA Basketball Men’s National Team.