The entire professional team at Oceana Gastroenterology Associates looks forward to seeing you in their Corona, California, offices. Our skilled and compassionate providers have been delivering high quality gastrointestinal care to patients in the area for decades. Please take a moment to meet the doctor and staff.
Meet M. Mazen Jamal, MD, MPH
Board-certified in gastroenterology and internal medicine
Fellowship-trained in interventional gastroenterology
Dr. M. Mazen Jamal is a gastroenterologist who is leading the charge to provide advanced treatment and diagnostic options for patients suffering from gastrointestinal disorders.
He received his master’s degree (MD) from the University of Damascus Medical School, followed by a residency in internal medicine and a fellowship in gastroenterology. Dr. Jamal then completed a fellowship in interventional gastroenterology at the University of Liverpool School of Medicine in England.
In 2001, he received a master’s degree in public health (MPH) at the University of New Mexico’s School of Public Health.
Dr. Jamal is board certified in both gastroenterology and internal medicine by the American Board of Internal Medicine.
He founded Oceana Gastroenterology Associates in 2014, where he diagnoses, monitors, and treats a wide variety of digestive disorders such as stomach pain, ulcers, acid reflux, constipation, and Crohn’s disease.
- Endoscopic ultrasound
- Endoscopic therapy for GERD
- Therapeutic biliary and pancreatic endoscopy
- Healthcare management
- American Society for Gastrointestinal Endoscopy
- American Association for the Study of Liver Diseases
- American College of Gastroenterology
- American Gastroenterological Association
- American Medical Association
Dr. Jamal regularly contributes published research, articles and more in industry journals, books, and other publications.
Meet the Professional Staff
In addition to Dr. Jamal, Oceana Gastroenterology Associates is pleased to introduce you to the other members of our patient-care team:
Laura Kheng, PA-C
Laura Kheng is a professional physician’s assistant who values being approachable by patients and colleagues alike.
She received her bachelor of science in biochemistry from the University of California, San Diego in 2012. Laura received her physician assistant certification from the National Commission on Certification of Physician Assistants in 2017.
Laura is fluent in English and Mandarin Chinese.
Jocelyn Do, FNP-C, RN, MSN
Jocelyn Do is a compassionate and dedicated family nurse practitioner at Oceana Gastroenterology Associates in Corona, California.
She received her bachelor of science in business marketing from California State University Northridge in 2008, and her master of science degree in nursing from Western University of Health Sciences in Pomona, California, in 2015. She holds a registered nurse license and received her FNP certification from the American Association of Nurse Practitioners.
Jocelyn is fluent in Vietnamese in addition to English.
Jenna E. Jacobs, PA-C
Jenna Jacobs is a licensed physician’s assistant who received her certification by the National Commission on Certification of Physician Assistants in 2010.
She received her bachelor of science in biology from La Sierra University in Riverside, California, in 2007, and her master of physician assistant studies from Touro University Nevada in Henderson in 2010.
A hardworking professional, Jenna is personable with a great bedside manner.
Ready to meet the health care providers at Oceana Gastroenterology Associates in person? Call (951) 934-0505 today or use our convenient appointment request form to schedule your appointment.