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    John C Billesdon, MD

    3.0 (2 reviews)
    Open 9:00 am - 5:00 pm

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    8 years ago

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    Anashe M.

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    10 years ago

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    Ventura County Gastroenterology Medical Group - New location yay

    Ventura County Gastroenterology Medical Group

    2.8(8 reviews)
    0.0 mi

    My review is for this gastroenterology office and their neighboring (next door) outpatient surgery…read morecenter. Seeing the lower reviews I wanted to come on to add some clarity and kudos where I can. Again, not always the kind of place a person wants to have to come but when navigating your healthcare needs it's important to find a place with professional staff, established doctors and an overall office that feels clean, organized and calm. I can understand some of the lower reviews for the wait times/hospitality at the main office. I've been here about three times and one out of the three times my experience was a little slow unnecessarily it felt like. But I just accepted that they were busy and sometimes there are things going on behind the scenes that those of us in the lobby can't always comprehend. I found my interactions with the front desk staff to be to the point, and while sometimes a little slow with the paperwork or getting me my materials, I still felt like it was a professional setting. On the back end all of the medical staff are really great in my opinion. The nurse practitioners that I have seen and the additional aids/surgery schedulers were all wonderful. Everyone was very friendly and I felt like my nurse practitioner was very kind and patient with me as we navigated some of my healthcare issues. I've been established with Dr. Rojany at this office over the years and he's honesty wonderful. Great beside manner, thorough, kind, attentive and makes your experience feel supportive. While my medical consultations with him have been sporadic over the years he has always been great and I would highly recommend him. I was re-introduced to him as I had to go into the surgery center for an outpatient procedure. Again, he was very kind and reassuring, and the process went smoothly for my procedure. To the nurses and staff working the surgery center next-door, I would give them 10/10 stars if that was a thing! Full transparency I'm a very emotionally medically fragile person lol from blood draws, to just being in a medical setting, I usually cry and have a lot of anxiety. Going in for a procedure where I was going to be given anesthesia was very anxiety provoking to me, but all of the staff that helped me were so kind and understanding. They made me feel safe, validated my experience, but reassured me that everything was going to go fine and just had really positive bedside manner to help get me to a place that I could calm down and get through with our appointment. There were so many lovely ladies that helped me. I'm sorry that I can't recall everyone by name, but I do think they just have an amazing stellar team here that if you have to have some Gastro follow up or procedures done this is the place to come in my opinion. Couldn't thank them enough for their kindness, care and professionalism.

    As I sit waiting on hold, 13 minutes so far, disconnected once, I have to agree with the "poor"…read moreservice from the staff comments. I've been a patient of Dr Miller's for years and he is a consummate professional. However, it is frustrating not to be able to make an appointment. Another time I was waiting for an MRI while the technician tried to reach the office, and it took 28 minutes on hold before anyone answered! Simply unprofessional since "UNIO Specialty Care" took over. I believe it is time to seek out another practice. This group must be understaffed and way too busy.

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    Donald Miller, MD

    Donald Miller, MD

    3.4(5 reviews)
    0.0 mi

    Really like this office and Dr Miller. Scheduling appointments and getting lab work orders is done…read morewhile you're there and it's very convenient. Dr Miller and the staff are always friendly and positive. I have always had a good experience

    Office experience was totally disrespectful, unprofessional and completely unorganized and I…read morepolitely let Dr. Miller know how I was treated and he seems to do nothing about it. It's obvious in the other persons review and mine. It seems as if the office possibly tried to falsely and charge me and my insurance and said I saw the doctor when receiving a test which I never saw any doctor on that day of the test.I had to contact my insurance company for them to refund the co pay off my bill. As well, they had a female assistant do my scan that I later found out was not a certified tech to do the test nor did they have a certified tech in the room with us. When I asked her how long she was certified to do the scans, she told me after I was on the table that all the techs were not there that day, but she said don't worry that she had seen many of them done so she could do it. I wasn't happy about it ,but I had no choice I was already on the table. Then when I received my medical testing paperwork it said a man's name under the technician that supposedly did my test though it wasn't him nor a certified person that performed my test. Then I tried to contact the office manager Elizebeth through emails and telephone calls politely and never received a response nor a call back. I would never step my foot in that office again nor recommend them. I ended up going to another wonderful gastroenterologist where his team and office treat patients with kindness,professionalism, and respect.

    Justin Marasigan, DO

    Justin Marasigan, DO

    1.0(1 review)
    0.0 mi

    Dr Marasigan is the worst excuse for a doctor I have ever met. Left me to suffer in pain for months…read morewithout listening to me. Would not refer me to medical center even when I begged. Always takes an eternity to get an appointment. Staff is horrifying. They hang up on you, never call back or just transfer you to a dial tone. You just cannot speak to anyone there as the wait time are almost an hour to make an appointment. I even tried in desperation used the portal to request an appointment couple weeks ago and just received a message from the doctor - he doesn't care.... Even a little. Not one care given. Cannot believe he is licensed. Please never meet this guy! Run! You are better off doing it yourself gasto.

    From the owner: Dr. Justin Marasigan is a Board-Certified Gastroenterologist who was raised in the Los Angeles…read morearea. 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 inSite Digestive Health Care in Ventura County, Dr. Marasigan was practicing Gastroenterology for 7 years in Washington State.

    John C Billesdon, MD - gastroenterologist - Updated August 2026

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