Dr. Tsai provides ear, nose, and throat care to adults and children for: hearing loss, vertigo, sinus disease, allergies, hoarseness, and swallowing problems. His interests include: head and neck surgery, including surgery of the thyroid, parathyroid, and salivary glands; sleep medicine - both non-surgical and surgical treatment; and scuba diving medicine. He is board certified in both otolaryngology and sleep medicine. He is on the DAN (Divers Alert Network) referral list for scuba diving medicine.