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.
Great Doctor Highly Rated to all 5 Star
(6 days ago)
Oct-2026
Dis not feel anything. Took a nap was all I remember
(1 week ago)
Sep-2026
Dr. Guan is the absolute best. I can’t say enough about how caring and thorough he is. These days it is so difficult to ever get a hold of your doctors, and yet he is always responsive and supportive. He also has a wealth of knowledge, experience and passion. He truly listens and always strives to find the most effective and innovative solutions. I have so much respect and appreciation for him, and I am a difficult patient with some serious issues. I have never had a GI doctor who I have felt has given me better care. I recommend him most highly, and I have referred my family members, who now are patients of his as well. That is my highest compliment because I trust him with not only my care, but the care of my loved ones!
(1 week ago)
Sep-2026
Very timely and personable. Easy to understand and talk to and he listens very well.
(1 week ago)
Sep-2026
dr guan is very nice ....he has been helping with my celiac disease. thanks dr guan
(2 weeks ago)
Sep-2026
Dr. Guan takes his time answering my questions. Even writing down information for me. He also explains findings and procedures thoroughly.
(2 weeks ago)
Sep-2026
Explanation of everything Great job
(1 month ago)
Sep-2026
Everyone is knowledgeable and friendly
(1 month ago)
Sep-2026
Beyond words happy with the doctor.
(1 month ago)
Sep-2026
Dr. Guan was very personable and took time to review my records and provided time for me to ask questions.
(1 month ago)
Aug-2026
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.
Great Doctor Highly Rated to all 5 Star
Dis not feel anything. Took a nap was all I remember
Dr. Guan is the absolute best. I can’t say enough about how caring and thorough he is. These days it is so difficult to ever get a hold of your doctors, and yet he is always responsive and supportive. He also has a wealth of knowledge, experience and passion. He truly listens and always strives to find the most effective and innovative solutions. I have so much respect and appreciation for him, and I am a difficult patient with some serious issues. I have never had a GI doctor who I have felt has given me better care. I recommend him most highly, and I have referred my family members, who now are patients of his as well. That is my highest compliment because I trust him with not only my care, but the care of my loved ones!
Very timely and personable. Easy to understand and talk to and he listens very well.
dr guan is very nice ....he has been helping with my celiac disease. thanks dr guan
Dr. Guan takes his time answering my questions. Even writing down information for me. He also explains findings and procedures thoroughly.
Explanation of everything Great job
Everyone is knowledgeable and friendly
Beyond words happy with the doctor.
Dr. Guan was very personable and took time to review my records and provided time for me to ask questions.