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About St. Joseph Health

SJH provides a full range of care facilities including 16 acute care hospitals, home health agencies, hospice care, outpatient services, skilled nursing facilities, community clinics and physician groups. All of our hospital and home health entities are accredited by the Joint Commission. In our award-winning facilities, SJH maintains a "continuum of care," matched to the diverse needs of the urban centers, smaller cities and rural communities who depend on us every day.

Om P. Chaurasia, MD

  • Gastroenterology
    (Board Certified)
Additional Language Spoken
Spanish, Hindi, English
Medical Groups & Affiliations
  • Mission Hospital Affiliated Physicians
  • Pacific Gastro. Med. Assoc.
  • Pacific Gastroenterology Endoscopy Center
  • Providence
26451 Crown Valley Parkway
Suite 140
Mission Viejo, CA 92691
Accepting New Patients

Primary Office

26451 Crown Valley Parkway
Suite 140
Mission Viejo, CA 92691
Get Directions
(949) 365-8836
(949) 365-8837
Mon - Fri 8 a.m. - 4:30 p.m. After hours care available in Ladera Ranch.

More Information

  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Gastroenterology
      (Board Certified)
    Education & Training
    • Medical School
      Prince of Wales Medical College
    • Internship
      University Med. Center of E. Carolina
    • Residency
      University Med. Center of E. Carolina
    • Fellowship
      University of California - 1995
    Areas of Interest


  • Biography



    Dr. Chaurasia received his medical degree from Patna Medical College, formerly the Prince of Wales Medical College, Patna, India, followed by internal medicine training in England, UK.

    He completed his residency training in internal medicine at the University Medical Center, East Carolina University, Greenville, North Carolina. In addition, he served there as the chief medical resident.

    He obtained 3-year fellowship training in gastroenterology and hepatology at the University of California, Irvine. At the University of Amsterdam, Holland, an internationally renowned center for pancreatobiliary endoscopy, he completed advanced training in therapeutic ERCP.

    His board certification includes American subspecialty board of gastroenterology which he passed with the highest decile of ten. He has received several awards including the Glaxo Fellow's award at the national meeting of the American Gastroenterological Association.

    He has served as the President of the Orange county gastroenterology society, and as a committee member of the American College of Gastroenterology. He has served on the clinical faculty as Assistant Clinical Professor at the University of California, Irvine, and is currently the medical director of Pacific Gastroenterology Endoscopy Center.

    In addition to general gastroenterololgy including colon cancer screening, he has a particular interest and expertise in the Endoscopic Retrogrde Cholangio-Pancretography (ERCP) and in the field of pancreatobiliary diseases.

    In peer-reviewed journals, he has authored several original articles and abstracts. He has given presentations at various professional society meetings at the state, national and international levels.


    Shankar U, Prasad M, Chaurasia OP. A rare case of langerhans cell histiocytosis of the gastrointestinal tract. World J Gastro­enterol 2012; 18(12): 1410-1413.

    Chaurasia OP, Rauws EAJ, Fockens P, Huibregtse K. Endoscopic techniques for retrieval of proximally migrated biliary stents: the Amsterdam experience. Gastrointest Endosc 50:780-785, 1999.

    Chaurasia OP. Percutaneous Endoscopic Gastro-jejunostomy tube placement. Gastrointest Endosc 47:433-434, 1998.

    Irwin FL Jr, Sarfeh IJ, Tanoue K, Chaurasia OP, Tarnawski A. The role of extracellular matrix in injury to gastric mucosa by indomethacin. J Clin Gastroenterol 21 Suppl 1:S18-23, 1995.

    Chaurasia OP, Chang KJ. A novel technique for percutaneous endoscopic gastrojejunostomy tube placement. Gastrointest Endosc 42:165-168, 1995.

    Chaurasia OP, Marcuard SP, Seidel ER. Insulin-like growth factor I in human gastrointestinal exocrine secretions. Regulatory Peptides 50:113-119, 1994.

    Board certified in Gastroenterology, American Board of Internal Medicine
    Areas of Expertise
    Colon cancer screening, Heartburn (Gastroesophageal Reflux Disease), Barrett's esophagus, Biliary, gall bladder and pancreatic diseases