Meet the Doctors Behind Citrus Valley Gastroenterology
Choosing a gastroenterologist is not a decision most people take lightly. Whether you are dealing with persistent acid reflux, preparing for a colonoscopy, or managing a chronic condition like inflammatory bowel disease, you want a physician who is not only highly trained but also genuinely invested in your comfort and long-term health. At Citrus Valley Gastroenterology, our patients across Covina, Glendora, and Chino trust a team of board-certified GI specialists who bring decades of combined experience, diverse training backgrounds, and a shared commitment to compassionate, patient-first care.
In this blog, we would like to introduce you to the physicians who make up our practice, so you can feel confident and informed before your very first visit.
Dr. Osama A. Sidhom, M.D.
With over 30 years of clinical experience, Dr. Sidhom is one of the most seasoned gastroenterologists on our team. He earned his medical degree from Alexandria University, Faculty of Medicine in Egypt, before completing his internal medicine internship at Grant Hospital of Chicago and his residency at Robert Wood Johnson Medical School in New Jersey. He went on to complete a fellowship in Clinical Pharmacology at Northwestern University Medical School, followed by fellowships in Gastroenterology and Therapeutic Biliary Endoscopy at the University of Southern California.
Outside the office, Dr. Osama Sidhom enjoys traveling, spending time with family, and staying active with a weekly tennis match against fellow local physicians, where he is known to be quite the competitor.
Dr. Sartaj M. Arora, M.D.
Dr. Arora has practiced medicine for more than 20 years, guided by a patient-first philosophy centered on accurate diagnosis and long-term digestive wellness. He completed his undergraduate studies in Biochemistry at UCLA before earning his medical degree from the University of California, San Diego. He then completed his Internal Medicine residency at Harbor-UCLA Medical Center and his Gastroenterology fellowship at UCLA's Harbor-affiliated program.
Dr. Arora believes personalized treatment planning is essential to helping patients achieve lasting digestive health. When he is not seeing patients, he enjoys hiking, running marathons, and spending time with his family.
Dr. Patrick Truong, M.D.
Dr. Truong earned his Bachelor of Science in Biological Science from the University of California, Irvine, and later received his medical degree from UCI College of Medicine in 2003. His training took him abroad for a surgical internship at the University of Bern in Switzerland, followed by an Internal Medicine residency at Cedars-Sinai Medical Center in Los Angeles. He completed his Gastroenterology fellowship at UC Irvine in 2009.
A dedicated family man, Dr. Truong loves spending time with his three children and enjoys cooking, driving, and exploring new restaurants in his free time.
Dr. Adam J. Snyder, M.D.
Dr. Snyder has practiced medicine for over a decade, with a special focus on colon cancer prevention and inflammatory bowel disease. He is known for performing careful, thorough colonoscopies aimed at identifying and removing precancerous polyps at a high rate, and he stays current with the latest medicines and technology for achieving lasting IBD remission. Dr. Snyder also treats complex conditions such as liver cirrhosis, acid reflux disease, and irritable bowel syndrome.
His commitment to care extends far beyond Citrus Valley Gastro. Dr. Adam J Snyder has traveled to Cambodia to teach and provide therapeutic biliary endoscopy in communities with limited access to quality healthcare. He completed his undergraduate education at UCLA, his medical degree at NYU School of Medicine, his residency at NYU, and his Gastroenterology fellowship at UC Irvine. In his personal time, he is an avid winter sports enthusiast and enjoys college football and basketball with his wife and two children.
Dr. Ankush Sharma, M.D.
Dr. Sharma has practiced medicine for over 10 years, developing his expertise in gastroenterology through training across the country. He has a particular interest in treating inflammatory bowel disease and gastrointestinal bleeding, and he is passionate about helping patients feel informed and at ease when it comes to colon cancer prevention and screening.
As a board-certified gastroenterologist serving Covina, Dr. Sharma specializes in colonoscopy, colon cancer prevention, and advanced digestive care. He completed his undergraduate education at the University of Southern California, his medical degree at the American University of the Caribbean School of Medicine, his Internal Medicine residency at Lehigh Valley Hospital Network, and his Gastroenterology fellowship at Wright State University.
Dr. Yi-Chia Wu, M.D.
Dr. Yi-Chia Wu is a board-certified gastroenterologist who completed her medical training at the Icahn School of Medicine at Mount Sinai Beth Israel and Saint Peter's University Hospital/Rutgers Robert Wood Johnson Medical School. She treats the full range of gastrointestinal conditions, from GERD and inflammatory bowel disease to liver disease and cirrhosis.
As a female gastroenterologist with a special interest in functional GI disorders, IBS, and GERD, Dr. Wu understands how significantly digestive issues can affect daily life. She prioritizes patient education, making sure her patients understand their conditions and feel involved in every treatment decision.
Dr. Syed Mohsin Saghir, M.D.
Dr. Saghir is board-certified in both Internal Medicine and Gastroenterology, with a career built on clinical excellence, research, and compassionate care. He completed his medical degree with honors at Ross University School of Medicine, his Internal Medicine residency at the University of Nevada, Las Vegas, where he was named Internal Medicine Resident of the Year in 2020, and his Gastroenterology fellowship at Creighton University School of Medicine.
Dr. Saghir has contributed numerous peer-reviewed publications to respected journals, including Digestive Diseases and Sciences and the American Journal of Gastroenterology. Fluent in Urdu and English, he is able to serve a diverse range of patients. Outside of medicine, he enjoys family time with his two children, working out, cooking, and traveling.
Why Our Team Makes the Difference
Every physician at Citrus Valley Gastroenterology brings a distinct background, from decades of clinical experience to fellowship training at some of the nation's top academic medical centers. What unites our team is a shared belief that patients deserve clear communication, thorough evaluation, and a treatment plan built around their individual needs. Whether you need a routine colonoscopy, ongoing management of a chronic digestive condition, or a second opinion, our providers across Covina, Glendora, and Chino are here to help.
If you are ready to schedule a visit, our team welcomes the opportunity to partner with you on your digestive health journey.
FAQs:
1. What conditions do the gastroenterologists at Citrus Valley Gastroenterology treat?
Our physicians treat a wide range of digestive conditions, including acid reflux (GERD), inflammatory bowel disease, irritable bowel syndrome, liver disease and cirrhosis, gastrointestinal bleeding, and colon cancer prevention through screening colonoscopies.2. Are the doctors at Citrus Valley Gastroenterology board-certified?
Yes, all of our gastroenterologists are board-certified and have completed fellowship training in gastroenterology at accredited academic medical centers across the United States.3. Which locations does the Citrus Valley Gastroenterology team serve?
Our physicians see patients at our offices in Covina, Glendora, and Chino, California, making expert digestive care accessible throughout the region.4. Does Citrus Valley Gastroenterology have a female gastroenterologist on staff?
Yes, Dr. Yi-Chia Wu is a board-certified female gastroenterologist on our team who specializes in functional GI disorders, IBS, and GERD.5. How do I choose the right gastroenterologist for my condition?
The best gastroenterologist for you depends on your specific digestive concerns and personal preferences. You can review each physician's areas of focus, such as IBD, colon cancer prevention, or functional GI disorders, and speak with our office staff, who can help match you with the provider best suited to your needs.Published on 31 Aug, 2026
