Dr. Justin Marasigan, D.O. earned his medical degree from Kirksville College of Osteopathic Medicine in Missouri. Dr. Marasigan went on to complete his Internal Medicine Residency in the Detroit area and his Gastroenterology specialty training in Erie, Pennsylvania. He applied a variety of experiences from rural offices to large academic centers throughout Western Pennsylvania and Eastern Ohio.
Dr. Justin Marasigan, D.O. earned his medical degree from Kirksville College of Osteopathic Medicine in Missouri. Dr. Marasigan went on to complete his Internal Medicine Residency in the Detroit area and his Gastroenterology specialty training in Erie, Pennsylvania. He applied a variety of experiences from rural offices to large academic centers throughout Western Pennsylvania and Eastern Ohio.
The reviews listed below were collected independently of Unio Specialty Care through rater8. Each review represents an authentic and verified patient experience.
Very good service, Him and his staff, thank you
(4 days ago)
Feb-2026
Great Doctor 👍
(1 week ago)
Feb-2026
Dr Marasigan explains things well. I did have to wait over an hour but he was apologetic.
(1 week ago)
Feb-2026
Dr. Marasigan is very knowledgeable, thorough and professional. I was apprehensive that my original doctor was retiring, but I ended up being very happy with Dr. Marasigan taking a new look and approach to my case. I have hope for the first time in years that he can help me with my stomach issues.
(1 week ago)
Feb-2026
He explained the results of past scans and what tests I might need in the future based on.my age.
(1 week ago)
Feb-2026
Thank you for all the information that you gave me
(2 weeks ago)
Feb-2026
Highly recommend. Thoroughly answered questions, and provided a range of treatment options. Already referred someone to him. Thank you
(3 weeks ago)
Feb-2026
great communication, kind, attentive. Dr. and staff accommodated my scheduling needs.
(3 weeks ago)
Feb-2026
Seems like a competent doctor, but he was extremely annoyed with the fact that a recent test resulted in a trace of blood in my stool and the recommendation from my primary doctor was to see a specialist. This was the second time seeing this doctor and he did somewhat reluctantly offered me to have another colonoscopy (which I guess he was required to do) but was quick to say that I had one just 15 months earlier and my guess is that because of that he did not feel another colonoscopy was necessary and truth be told I wasn’t very excited about having to do another one either, but if there was a trace of blood in my stool.., in my mind, that could be an early early sign of bad things coming, but honestly, the way this guy was communicating with me really made me to feel like doing another colonoscopy would be a waste of time. Maybe recent Industry trends have led this doctor to feel past practices or processes are outdated and/or inaccurate. But despite that this was not a great visit.
(3 weeks ago)
Feb-2026
Comprehensive and supportive. Great counsel and post visit medical plan.
(3 weeks ago)
Feb-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. Justin Marasigan, D.O. was raised in the Los Angeles area. He earned his undergraduate degree from the University of Southern California and his medical degree from Kirksville College of Osteopathic Medicine in Missouri. Dr. Marasigan went on to complete his Internal Medicine Residency in the Detroit area and his Gastroenterology specialty training in Erie, Pennsylvania. He applied a variety of experiences from rural offices to large academic centers throughout Western Pennsylvania and Eastern Ohio. Prior to joining the team in Ventura County, Dr. Marasigan practiced Gastroenterology for 7 years in Washington State.
When he is not at work, Dr. Marasigan enjoys spending time with his wife, twin son and daughter, and dog Sadie
Very good service, Him and his staff, thank you
Great Doctor 👍
Dr Marasigan explains things well. I did have to wait over an hour but he was apologetic.
Dr. Marasigan is very knowledgeable, thorough and professional. I was apprehensive that my original doctor was retiring, but I ended up being very happy with Dr. Marasigan taking a new look and approach to my case. I have hope for the first time in years that he can help me with my stomach issues.
He explained the results of past scans and what tests I might need in the future based on.my age.
Thank you for all the information that you gave me
Highly recommend. Thoroughly answered questions, and provided a range of treatment options. Already referred someone to him. Thank you
great communication, kind, attentive. Dr. and staff accommodated my scheduling needs.
Seems like a competent doctor, but he was extremely annoyed with the fact that a recent test resulted in a trace of blood in my stool and the recommendation from my primary doctor was to see a specialist. This was the second time seeing this doctor and he did somewhat reluctantly offered me to have another colonoscopy (which I guess he was required to do) but was quick to say that I had one just 15 months earlier and my guess is that because of that he did not feel another colonoscopy was necessary and truth be told I wasn’t very excited about having to do another one either, but if there was a trace of blood in my stool.., in my mind, that could be an early early sign of bad things coming, but honestly, the way this guy was communicating with me really made me to feel like doing another colonoscopy would be a waste of time. Maybe recent Industry trends have led this doctor to feel past practices or processes are outdated and/or inaccurate. But despite that this was not a great visit.
Comprehensive and supportive. Great counsel and post visit medical plan.