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 nice doctor
(3 days ago)
Aug-2026
I cannot recommend Dr. Jay Guan highly enough. I have been seeing him for several months following my deployment to manage GERD, IBS, and gastritis, and we are currently running further tests for Crohn's disease. Dr. Guan is phenomenal—exceptionally knowledgeable, thorough, and a fantastic listener. Whenever I report new symptoms, he immediately works with me to find a practical remedy. He takes the time to break everything down so I completely understand my treatment plan. Five out of five stars!
(5 days ago)
Aug-2026
Dr. Guan is very compassionate and excellent.
(1 week ago)
Jul-2026
Great visit. Knows his stuff. Felt like I was in good hands.
(1 week ago)
Jul-2026
Dr. Guan is a compassionate and understanding provider with impeccable bedside manners. He also provides or explains all the questions asked of him. I have a complete confidence in him. Thank you.
(1 week ago)
Jul-2026
Excellent communication skills
Very personable
(2 weeks ago)
Jul-2026
Listened, checked my chart before coming in room (this was my 1st visit as my MD retired) so he knew my health condition. Nice and professional
(2 weeks ago)
Jul-2026
Took the time to explain things very well.
(2 weeks ago)
Jul-2026
Dr listened thoughtfully and was helpful in explaining the medicinal approach we were starting.
(2 weeks ago)
Jul-2026
The best
(3 weeks ago)
Jul-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 nice doctor
I cannot recommend Dr. Jay Guan highly enough. I have been seeing him for several months following my deployment to manage GERD, IBS, and gastritis, and we are currently running further tests for Crohn's disease. Dr. Guan is phenomenal—exceptionally knowledgeable, thorough, and a fantastic listener. Whenever I report new symptoms, he immediately works with me to find a practical remedy. He takes the time to break everything down so I completely understand my treatment plan. Five out of five stars!
Dr. Guan is very compassionate and excellent.
Great visit. Knows his stuff. Felt like I was in good hands.
Dr. Guan is a compassionate and understanding provider with impeccable bedside manners. He also provides or explains all the questions asked of him. I have a complete confidence in him. Thank you.
Excellent communication skills Very personable
Listened, checked my chart before coming in room (this was my 1st visit as my MD retired) so he knew my health condition. Nice and professional
Took the time to explain things very well.
Dr listened thoughtfully and was helpful in explaining the medicinal approach we were starting.
The best