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.
Very friendly and knowledgeable
(3 days ago)
Aug-2026
Compassionate, listened to concerns. Explained upcoming procedures.
(4 days ago)
Aug-2026
Dr. Guan is very personable and easy to talk to. He really listens. I have a serious problem and I feel like I’m in good hands and taken care of. He is really on the ball and knows his stuff!
(1 week ago)
Aug-2026
Dr. Guan is very knowledgeable and a good listener.
(1 week ago)
Aug-2026
He is kind and intelligent.
(1 week ago)
Aug-2026
He’s the best gi dr I’ve had. And I’ve seen a lot
(2 weeks ago)
Aug-2026
Super knowledgeable. Friendly and I don’t feel like he was rushed.
(2 weeks ago)
Aug-2026
Most excellent
(2 weeks ago)
Aug-2026
Was on time for my appointment and was very warm and companionate. He listened and then came up with a game plan for my health concerns. I’m VERY grateful that we found him and looking to make him my new gastro doctor as my old doctor had retired.
(3 weeks ago)
Aug-2026
Very nice doctor
(3 weeks ago)
Aug-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.
Very friendly and knowledgeable
Compassionate, listened to concerns. Explained upcoming procedures.
Dr. Guan is very personable and easy to talk to. He really listens. I have a serious problem and I feel like I’m in good hands and taken care of. He is really on the ball and knows his stuff!
Dr. Guan is very knowledgeable and a good listener.
He is kind and intelligent.
He’s the best gi dr I’ve had. And I’ve seen a lot
Super knowledgeable. Friendly and I don’t feel like he was rushed.
Most excellent
Was on time for my appointment and was very warm and companionate. He listened and then came up with a game plan for my health concerns. I’m VERY grateful that we found him and looking to make him my new gastro doctor as my old doctor had retired.
Very nice doctor