Dr. Jay Guan, M.D. earned his medical degree at Chicago Medical School—Rosalind Franklin University and completed his residency at University of Southern California. He finished his fellowship in Loma Linda University Medical Center. Dr. Guan has extensive training in a broad range of GI disorders and procedures. His clinical focus includes Inflammatory Bowel Disease, Barret’s Esophagus, NASH, GI motility disorders, Hepatitis B/C, and Eosinophilic Esophagitis.
Dr. Jay Guan, M.D. earned his medical degree at Chicago Medical School—Rosalind Franklin University and completed his residency at University of Southern California. He finished his fellowship in Loma Linda University Medical Center. Dr. Guan has extensive training in a broad range of GI disorders and procedures. His clinical focus includes Inflammatory Bowel Disease, Barret’s Esophagus, NASH, GI motility disorders, Hepatitis B/C, and Eosinophilic Esophagitis.
The reviews listed below were collected independently of Unio Specialty Care through rater8. Each review represents an authentic and verified patient experience.
Excellent service l, he explained everything so clearly
(4 days ago)
Feb-2026
Dr Guan took his time and all of my questions. He is very professional, knowledgeable and very kind. He really cares about helping his patients feel better.
(5 days ago)
Feb-2026
Dr. Guan takes the time to listen, very professional as well!!!
(1 week ago)
Feb-2026
Takes the time to listen and give good feedback. Knows his specialty well!!
(1 week ago)
Feb-2026
The doctor himself is great, the offices are beautiful.
(1 week ago)
Feb-2026
Clear explanations. Brings expertise on new clinical practices, such as Foodmarble and a sheath for colonoscopy camera.
(1 week ago)
Feb-2026
It’s amazing how different my experiences are from one doctor to another. Getting an accurate diagnosis is the most important thing, then a proper treatment plan, and finally a successful result. Dr Guan is a winner and he knows his stuff, so you’ll be off to a great start by seeing HIM for your situation!
(1 week ago)
Feb-2026
He was courteous, he listened,, asked questions and made his recommendations. I am completely satisfied with this visit.
(1 week ago)
Feb-2026
He was not there
(2 weeks ago)
Feb-2026
Great new exactly what I was dealing with and gave me two trigger injections and I feel much better
(2 weeks ago)
Feb-2026
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GI-Camarillo
4005 Mission Oaks Blvd. Unit A Camarillo, CA 93012
GI-Oxnard
2241 Wankel Way Suite A Oxnard, CA
Dr. Jay Guan, M.D. earned his medical degree at Chicago Medical School—Rosalind Franklin University and completed his residency at University of Southern California. He finished his fellowship in Loma Linda University Medical Center. Dr. Guan has extensive training in a broad range of GI disorders and procedures. His clinical focus includes Inflammatory Bowel Disease, Barret’s Esophagus, NASH, GI motility disorders, Hepatitis B/C, and Eosinophilic Esophagitis.
Excellent service l, he explained everything so clearly
Dr Guan took his time and all of my questions. He is very professional, knowledgeable and very kind. He really cares about helping his patients feel better.
Dr. Guan takes the time to listen, very professional as well!!!
Takes the time to listen and give good feedback. Knows his specialty well!!
The doctor himself is great, the offices are beautiful.
Clear explanations. Brings expertise on new clinical practices, such as Foodmarble and a sheath for colonoscopy camera.
It’s amazing how different my experiences are from one doctor to another. Getting an accurate diagnosis is the most important thing, then a proper treatment plan, and finally a successful result. Dr Guan is a winner and he knows his stuff, so you’ll be off to a great start by seeing HIM for your situation!
He was courteous, he listened,, asked questions and made his recommendations. I am completely satisfied with this visit.
He was not there
Great new exactly what I was dealing with and gave me two trigger injections and I feel much better