Abraham Hsieh, M.D.,earned his medical degree from Tufts University. He completed his otolaryngology residency at the University of California in Irvine. After working at Kaiser Permanente for six years as the assistant chief in head and neck surgery in Vallejo and Fairfield, he joined Diablo Valley Ear, Nose and Throat in 1999. Dr. Hsieh’s specialty is rhinology and sinus surgery. He is board certified in otolaryngology andworksin pediatric otolaryngology, sleep apnea management, and head and neck oncology.