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Providers

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

Dr. M. Mazen Jamal - Oceana Gastroenterology Associates

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.

Special Training

  • Endoscopic ultrasound
  • Endoscopic therapy for GERD
  • Therapeutic biliary and pancreatic endoscopy
  • Healthcare management

Professional Memberships

  • 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:

Bao-Khoi Vu, PA-C

He specializes in Gastroenterology and Hepatology.

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.

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.

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At Oceana Gastroenterology Associates, Dr. M. Mazen Jamal provides diagnosis and treatment for a wide range of gastrointestinal issues for patients in Corona, Riverside, and Inland Empire areas of California. Some of our procedures include Endoscopic Ultrasonography, Therapeutic ERCP, Colonoscopy, Upper Endoscopy, Bravo pH Testing, and Capsule Endoscopy.

  • Home
  • About
  • Providers
  • Conditions
  • Treatments & Procedures
    • Therapeutic ERCP
    • Endoscopic Ultrasonography
    • Bravo pH Testing
    • SmartPill Motility Monitoring
    • Colonoscopy
    • Upper Endoscopy
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  • Patient Resources
  • Location
  • Reviews
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