Opened on July 28, 2025 as the first phase of the 62-acre Hillcrest Medical Campus Redevelopment, McGrath Outpatient Pavilion is the six-floor, 250,000-square-foot UC San Diego Health building at 4250 First Avenue, named through a $25 million McGrath Family Foundation gift. The pavilion consolidates a multi-specialty cancer clinic, the Barbara Parker, MD Breast Center, an infusion clinic, advanced radiation therapy including brachytherapy, and the Steven R. Garfin, MD Orthopaedic Surgery Clinic, the namesake academic clinic of UC San Diego orthopedic surgeon Garfin Steven R MD. Ambulatory surgery suites, large operating rooms, and advanced imaging anchor the surgical and diagnostic side of the building, with audiology, ENT, neurology, neurosurgery, orthopedics, pain management, perinatology, plastic surgery, urology, and vascular surgery distributed across the upper floors. Routine internal medicine and primary care visits remain outside the pavilion's specialty scope, handled at separate community offices including Hillcrest Internal Medicine San Diego for non-procedural follow-up. A new 1,850-space parking structure at 4245 First Avenue connects to the pavilion through an underground walkway, with patient parking on level PL and a dedicated drop-off zone separated from staff and visitor traffic. The pavilion's most ambitious clinical workload is the integrated cancer program, where multidisciplinary tumor boards, brachytherapy delivery, infusion-room chemotherapy, and surgical oncology are co-located under one roof to compress the diagnosis-to-treatment timeline for patients referred in from Moores Cancer Center on the La Jolla campus.