San Diego Sinus Center operates as the sinus-focused division of Coronado Ear, Nose & Throat at 1222 First Street in Coronado, Suite 3, within the 92118 ZIP. Board-certified otolaryngologist Dr. Mark Scheurer founded the practice in 2014 after completing his ENT residency at San Diego Naval Hospital in 2006 and serving as an aerospace and preventive medicine physician to helicopter squadrons at NAS North Island, where he flew the MH-60S Seahawk before retiring from the Navy in 2011. The office houses an in-office sinus CT scanner that completes imaging in under thirty seconds with eighty-two percent less radiation than conventional scanners, paired with real-time image-guidance navigation technology for instrument tracking during procedures — diagnostic capabilities that complement the integrative allergy-management approach at Trinity Naturopathic on the island. Balloon sinuplasty is the preferred surgical intervention for chronic and recurrent sinusitis, using inflatable catheters to permanently dilate narrowed sinus ostia without cutting or tissue removal. All patient encounters are conducted exclusively by the board-certified otolaryngologist with no physician extenders, and allergy-related prescriptions fill at island pharmacies including Walgreens on Orange Avenue. Highest-complexity cases involve CT-guided balloon sinuplasty with simultaneous image-navigation tracking across maxillary, frontal, and sphenoid sinuses in patients presenting with pansinusitis and concurrent nasal-valve obstruction requiring staged surgical correction.