Dr. Brian P. O'Sullivan is a pediatric pulmonologist in Manchester, New Hampshire and is affiliated with multiple hospitals in the area, including Children's Hospital at Dartmouth and Dartmouth Hitchcock Medical Center. He received his medical degree from Geisel School of Medicine at Dartmouth and has been in practice for more than 20 years. Dr. Brian P. O'Sullivan accepts Aetna, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted.