Our Services

Gastroenterology

St. Jude Heritage Medical Group provides expert diagnosis and treatment of all types of gastrointestinal diseases and digestive disorders, from inflammatory bowel disease to GERD. As one of the largest and most respected GI groups in Southern California, we offer highly skilled physicians, the most advanced diagnostic and treatment options, and a patient-centered approach.

Our commitment to medical excellence and patient safety is evident in our exceptional outcomes, including complication rates that are dramatically lower than the national average. And our exclusive partnership with St. Jude Medical Center and its Knott Family Endoscopy Center allows us to offer today’s newest diagnostic and treatment technology. Located next door to our offices, the Knott Family Endoscopy Center is designed to provide patients with unmatched care and comfort.

Meet Our Doctors

Martin Carr MD (714) 446-5831
Gastroenterology (Board Certified)
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Office :
1847 Sunnycrest Dr.
Fullerton, CA 92835
Hyder Z. Jamal MD (714) 577-6624
Gastroenterology (Board Certified)
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Office :
4300 Rose Drive, Suite G
Yorba Linda, CA 92886
Sajen J. Mathews MD (714) 446-5831
Gastroenterology (Board Certified)
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Office :
1847 Sunnycrest Dr.
Fullerton, CA 92835
Y.S. Frank Miao MD (714) 626-8650
Gastroenterology (Board Certified)
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Office :
2141 N. Harbor Blvd., Suite 25000
Fullerton, CA 92835
Scott P. Sainburg MD (714) 446-5831
Gastroenterology (Board Certified)
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Office :
1847 Sunnycrest Dr.
Fullerton, CA 92835
Eugene Yoon MD (714) 446-5831
Gastroenterology (Board Certified)
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Office :
1847 Sunnycrest Drive
Fullerton, CA 92835