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 Rd.
    Suite 200, 240
    Mission Viejo, CA 92691
  • (949) 364-5090

Meet Our Doctors

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

Mon - Fri 8:30 a.m. - 4:30 p.m. Phones turned off for lunch between 12 p.m. - 1:30 p.m.

View Profile
Office 1:
27871 Medical Center Dr.
Suite 200
Mission Viejo, CA 92675

Office 2:
St. Joseph Heritage Medical Group
2501 E. Chapman Ave.
Suite 407
,
Office :
27871 Medical Center Dr.
Suite 200
Mission Viejo, CA 92691
Edward J. Block, MD (949) 364-5090
Gastroenterology

Mon 8 a.m. - 5 p.m., Tue 8 a.m. - 5 p.m., Wed 8 a.m. - 5 p.m., Thu 8 a.m. - 5 p.m., Fri 8 a.m. - 5 p.m., Sat

View Profile
Office 1:
27871 Medical Center Dr.
Suite 240
Mission Viejo, CA 92691

Office 2:
1275 N. Rose Dr.
Suite 108
,
Elmer Y. Chang, MD (949) 364-5090
Gastroenterology (Board Certified)
View Profile
Office 1:
27871 Medical Center Dr.
Suite 200
Mission Viejo, CA 92691

Office 2:
St. Joseph Health Medical Group
1476 Professional Dr.
Suite 504
,
Eric Chu, MD (949) 364-5090
Gastroenterology (Board Certified)
View Profile
Office :
27871 Medical Center Dr.
Suite 200
Mission Viejo, CA 92691
Office :
27871 Medical Center Dr.
Suite 240
Mission Viejo, CA 92691
Michael J. Santoro, MD (949) 364-5090
Gastroenterology

Mon 8 a.m. - 8 p.m., Tue 8 a.m. - 8 p.m., Wed 8 a.m. - 8 p.m., Thu 8 a.m. - 8 p.m., Fri 8 a.m. - 8 p.m., Sat

View Profile
Office :
27871 Medical Center Dr.
Suite 240
Mission Viejo, CA 92691