Holding dual American Board certification in Internal Medicine and Gastroenterology after medical school at Vanderbilt University (class of 2010), Dr. Joshua Rubin sees adult patients through UC San Diego Health at 4168 Front St in Hillcrest. Colonoscopy screening, upper endoscopy scheduling, and complex IBD referrals coordinate through San Diego Gastroenterology as a private-practice GI option when academic-center scheduling is full. Visit focus spans GERD workups, chronic abdominal pain, Barrett’s esophagus surveillance, and hepatic function monitoring alongside general internal medicine follow-up. Same-campus imaging and ambulatory surgical coordination route to McGrath Outpatient Pavilion at UC San Diego Health, keeping pre- and post-procedure follow-up within one UCSD site. The most complex work integrates hepatology surveillance for cirrhosis patients, colorectal cancer screening protocols for family-history-positive adults, and multidisciplinary inflammatory bowel disease management bringing together GI, colorectal surgery, and nutrition on a single treatment plan.