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.
Dr Guan is extremely thorough and patient. He explains things well.
(4 days ago)
Apr-2026
Knowledge through polite kind
(5 days ago)
Apr-2026
5 stars for Dr Guan! He is super smart and really listens to my concerns. He makes my day to day life so much better under his care.
(5 days ago)
Apr-2026
He was very informative. Answered my questions. Then left the exam room without saying goodbye. After a few awkward minutes in the exam room not knowing if I was to stay or go, I went into the hallway. Found him and asked if I was done. He said an assistant would be in to set up an appointment. Very awkward and outside the norm for common courtesy. Yet, I reiterate, he answered my questions and was well-informed medically.
(6 days ago)
Apr-2026
Very nice and informative.
(6 days ago)
Apr-2026
I felt very comfortable speaking with this doctor. He was very professional.
(6 days ago)
Apr-2026
Great first visit pre-colonoscopy! Everything explained well and greatly appreciated.
(6 days ago)
Apr-2026
Dr Guan was very knowledgeable, attentive, and helpful. For as busy as this practice is, I did not feel rushed in any way. I really appreciated that.
(1 week ago)
Apr-2026
Dr. Guan was very helpful and explained everything thoroughly to ensure that my experience was as comfortable as possible.
(1 week ago)
Apr-2026
Very good service, experienced doctor.
(1 week ago)
Apr-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.
Dr Guan is extremely thorough and patient. He explains things well.
Knowledge through polite kind
5 stars for Dr Guan! He is super smart and really listens to my concerns. He makes my day to day life so much better under his care.
He was very informative. Answered my questions. Then left the exam room without saying goodbye. After a few awkward minutes in the exam room not knowing if I was to stay or go, I went into the hallway. Found him and asked if I was done. He said an assistant would be in to set up an appointment. Very awkward and outside the norm for common courtesy. Yet, I reiterate, he answered my questions and was well-informed medically.
Very nice and informative.
I felt very comfortable speaking with this doctor. He was very professional.
Great first visit pre-colonoscopy! Everything explained well and greatly appreciated.
Dr Guan was very knowledgeable, attentive, and helpful. For as busy as this practice is, I did not feel rushed in any way. I really appreciated that.
Dr. Guan was very helpful and explained everything thoroughly to ensure that my experience was as comfortable as possible.
Very good service, experienced doctor.