Dr. Wiener's gastroenterology and internal medicine practice in Chula Vista operates from 353 Church Avenue in the western 91910 corridor, with dual hospital privileges at Sharp Chula Vista Medical Center and Scripps Mercy Hospital Chula Vista. Gastrointestinal pathology frequently intersects with cardiovascular risk factors such as metabolic syndrome, a diagnostic overlap addressed by Cardiovascular Institute of San Diego through parallel cardiac workups for patients carrying multi-system disease. Board certified in both gastroenterology and internal medicine, Wiener completed a gastroenterology fellowship at Bowman Gray School of Medicine in 1987 and has maintained continuous practice since 1990, while also directing clinical trials through GW Research at the same Church Avenue address. Specialty medication management for conditions including inflammatory bowel disease, hepatitis C, and cirrhosis coordinates with Chula Vista Pharmacy for formulary fulfillment requiring cold-chain handling and prior-authorization processing. The practice's highest-acuity procedures include therapeutic endoscopic retrograde cholangiopancreatography, esophageal dilation with graduated bougie technique, and polypectomy with electrocautery snare during screening and surveillance colonoscopy.