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! Caring, patient, and explained everything well.
(1 week ago)
Oct-2025
Pleasant and explained his theory to us .
(1 week ago)
Oct-2025
Very knowledgeable and professional
(2 weeks ago)
Sep-2025
Listens intently, and has a great staff
(3 weeks ago)
Sep-2025
I liked the way he explained everything, and not in a rush. Nice doctor.👍
(3 weeks ago)
Sep-2025
Dr. Guan is a wonderful GI doctor with an excellent bedside manner. He really listens and takes the time to understand your concerns, and he communicates everything clearly so you feel at ease. He’s respectful, caring, and very knowledgeable, which gives you complete confidence in his care. I’m truly grateful to have him as my doctor and highly recommend him.
(1 month ago)
Sep-2025
We got lost and were late to our appointment but Dr Guan kindly fit us into his busy schedule.
He spent so much time answering all my questions and he generously gave me samples of the very expensive antibiotic
drug he prescribed.
(1 month ago)
Sep-2025
Dr.Guan is great. I had a bad experience with my last gastroenterologist but since finding Dr.Guan everything has been wonderful.
(1 month ago)
Sep-2025
Outstanding and informative!
(1 month ago)
Sep-2025
Wonderful doctor
(1 month ago)
Sep-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.
Excellent! Caring, patient, and explained everything well.
Pleasant and explained his theory to us .
Very knowledgeable and professional
Listens intently, and has a great staff
I liked the way he explained everything, and not in a rush. Nice doctor.👍
Dr. Guan is a wonderful GI doctor with an excellent bedside manner. He really listens and takes the time to understand your concerns, and he communicates everything clearly so you feel at ease. He’s respectful, caring, and very knowledgeable, which gives you complete confidence in his care. I’m truly grateful to have him as my doctor and highly recommend him.
We got lost and were late to our appointment but Dr Guan kindly fit us into his busy schedule. He spent so much time answering all my questions and he generously gave me samples of the very expensive antibiotic drug he prescribed.
Dr.Guan is great. I had a bad experience with my last gastroenterologist but since finding Dr.Guan everything has been wonderful.
Outstanding and informative!
Wonderful doctor