Our Services

Gastroenterology

The Gastroenterology Department of Mission Heritage Medical Group provides diagnostics and therapeutic endoscopy services in a friendly and professional setting, by physicians recognized by the OCMA as Orange County Physicians of Excellence. With state of the art testing, including endoscopic procedures available through our Endoscopy Center, our physicians can provide complete consultative services, follow-up and emergency care at Mission Hospital.

The combination of over 20 years of experience in treating Orange County patients and the facilities to provide Capsule Enteroscopy (PillCam), Hydrogen Breathing testing, Espohageal Manometry and our MHMG Nuclear Medicine Department, our patient have access to complete and experienced care. Our staff of Board Certified Gastroenterologists, Nurse Practitioner and Physician Assistant welcome the opportunity to provide you with unparalleled care.

Our physicians have been recognized by the OCMA as Orange County Physicians of Excellence.

Links to websites for patient access*

  • Medicinenet.com
  • Webmd.com

*Medical information found on MHMG.com or related links is provided for general patient information only, and may not be relied upon as a substitute for professional medical care.

View Our Locations

Gastroenterology

  • 27871 Medical Center Road
    Suite 200, 240
    Mission Viejo, CA 92691
  • (949) 364-5090

Meet Our Doctors

Ronald N. Adamany MD (949) 364-5090
Gastroenterology

M-F: 8:30 a.m. - 5 p.m.

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Office :
27871 Medical Center Drive
Suite 200
Mission Viejo, CA 92675
Office :
27871 Medical Center Rd. #200
Mission Viejo, CA 92691
Edward J. Block MD (949) 364-5090
Gastroenterology

Monday :8 am :5 pm. Tuesday :8 am :5 pm. Wednsday :8 am :5 pm. Thursday :8 am :5 pm. Friday :8 am :5 pm. Saturday

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Office :
27871 Medical Center Road #240
Mission Viejo, CA 92691
Elmer Y. Chang MD (949) 364-5090
Gastroenterology (Board Certified)
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Office :
27871 Medical Center Rd #200
Mission Viejo, CA 92691
Eric Chu, MD (949) 364-5090
Gastroenterology (Board Certified)
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Office :
27871 Medical Center Rd, Suite 200
Mission Viejo, CA 92691
Office :
27871 Medical Center Rd., Suite 240
Mission Viejo, CA 92691
Michael J. Santoro MD (949) 364-5090
Gastroenterology

Monday :9 am :4 pm. Tuesday :9 am :4 pm. Wednsday :9 am :12 pm. Thursday :9 am :4 pm. Friday :9 am :2 pm. Saturda

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Office :
27871 Medical Center Rd #240
Mission Viejo, CA 92691