500 W. San Bernardino Rd. Suite B
Covina, CA 91722
(626) 960-2326
415 W. Route 66, Suite 102
Glendora, CA 91740
(626) 610-2112
Dr. S. Paul Sharma


All our professionals at Citrus Valley Gastroenterology maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in gastroenterology.

Osama A. Sidhom, MD


  • M.D. Alexandria University, Faculty of Medicine, Egypt
  • Internal Medicine Internship: Grant Hospital of Chicago
  • Internal Medicine Residency: Robert Wood Johnson Medical Schools (Rutgers)
  • Clinical Pharmacology Fellowship: Northwestern University Medical School
  • Gastroenterology Fellowship: University of Southern California
  • Therapeutic Biliary Endoscopy Fellow: University of Southern California

Sartaj Marty Arora, MD


  • B.S. Biochemistry: University of California, Los Angeles
  • M.D. University of California, San Diego
  • Internal Medicine Residency: Harbor-UCLA Medical Center
  • Gastroenterology Fellowship: UCLA Affiliated Program, Harbor-UCLA Medical Center

Patrick B. Truong, MD


  • B.S. Biological Science: University of California, Irvine
  • M.D. University of California, Irvine, College of Medicine
  • Surgical Internship: University of Bern, Inselspital, Bern, Switzerland
  • Internal Medicine Residency: Cedars Sinai Medical Center, Los Angeles
  • Gastroenterology Fellowship: University of California Medical Center, Irvine

George Ferenczi, MD


  • M.D. Tulane University School of Medicine, New Orleans
  • Internal Medicine Residency: LA County Hospital – USC
  • Gastroenterology Fellowship: LA County Hospital – USC

Adam J. Snyder, MD

Education :

  • Undergraduate Education: University of California, Los Angeles California
  • Medical Education: New York University School of Medicine (NYU). New York, NY
  • Surgical Internship: University of Bern, Bern Switzerland
  • Internal Medicine Residency: New York University School of Medicine (NYU). New York, NY
  • Gastroenterology Fellowship: University of California, Irvine (UCI). Irvine, California

Ankush Sharma, MD


  • Undergraduate Education: University of Southern California
  • Medical Education: American University of the Caribbean School of Medicine- St. Maarten, Neth. Antilles
  • Internal Medicine Residency: Lehigh Valley Hospital Network/Pennsylvania State University Program- Allentown, PA
  • Gastroenterology Fellowship: Wright State University Dayton, Ohio