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 professional and I highly recommend
(4 days ago)
Feb-2026
Doctor was very pleasant and informative answered all my questions. The front desk was very reserved.
(5 days ago)
Feb-2026
Excellent customer service, appreciate he speaks Spanish.
(5 days ago)
Feb-2026
Very competent and personable.
(1 week ago)
Jan-2026
Very kind and patient.
(1 week ago)
Jan-2026
Very thorough explanation of my results and helpful advice for going forward.
(1 week ago)
Jan-2026
Outstanding expressing importance of performing colonoscopy procedure to my son.
(1 week ago)
Jan-2026
Very nice and friendly
(1 month ago)
Jan-2026
I specifically switched to Dr Guan from Dr Rojany because I feel he is more attentive and caring and present at our appointments. I recommend him all the time.
(1 month ago)
Jan-2026
Arrived for appointment only to be sent away claiming no authorization for procedure had been created and an ADDITIONAL consult was required. Office staff should have informed me Of all of this well before appointment time. Complete waste of time and money.
(1 month ago)
Dec-2025
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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 professional and I highly recommend
Doctor was very pleasant and informative answered all my questions. The front desk was very reserved.
Excellent customer service, appreciate he speaks Spanish.
Very competent and personable.
Very kind and patient.
Very thorough explanation of my results and helpful advice for going forward.
Outstanding expressing importance of performing colonoscopy procedure to my son.
Very nice and friendly
I specifically switched to Dr Guan from Dr Rojany because I feel he is more attentive and caring and present at our appointments. I recommend him all the time.
Arrived for appointment only to be sent away claiming no authorization for procedure had been created and an ADDITIONAL consult was required. Office staff should have informed me Of all of this well before appointment time. Complete waste of time and money.