Fellow of the American College of Surgeons Patrick G. McCallion, MD has practiced otolaryngology at ENT Associates of San Diego's La Mesa office on Grossmont Center Drive since completing his USC/LAC+USC Medical Center residency in 1992. Board-certified by the American Board of Otolaryngology—Head and Neck Surgery, he performs adult and pediatric ENT procedures with surgical privileges at Sharp Grossmont Hospital, the 22,200-monthly-search anchor of La Mesa's medical infrastructure. Dr. McCallion received his medical degree from the University of California, Irvine School of Medicine in 1987 and maintains memberships in the American Academy of Otolaryngology—Head and Neck Surgery, the San Diego County Medical Society, and the California Medical Association. The practice's sinus program utilizes in-office CT imaging and balloon sinuplasty catheter dilation for chronic sinusitis, while obstructive sleep apnea evaluations involve polysomnography interpretation and oral-appliance coordination with Apex Dental Sleep Lab. ENT Associates of San Diego operates from Building 3, Suites 101 and 154 at 5565 Grossmont Center Drive in the Grossmont area. Highest-complexity interventions include endoscopic sinus surgery with image-guided navigation and functional septorhinoplasty for combined nasal-obstruction and cosmetic correction.