Advanced Gastroenterology, Inc

4.9 / 5Overall Rating

185 reviews

555 Marin St #270, Thousand Oaks, CA 91360

(805) 719-0244

Patient Reviews
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Thorough examination by Dr. Simoni. He recommended that I follow up with my Infectious Disease doctor. Dr. Simoniโ€™s office staff were very pleasant and accommodating.

Thank you Dr. Simoni and staff. One question, went to two labs on form I was given for blood work at two labs on Rolliig Oaks both said they don't do the blood work ordered?

Very pleasant experience and great staff. Please do not post my feedback online with my name.

Dr. Simoni was very friendly and knowledgeable. Great Doctor!

Informative, helpful and specific.

Dr. Simoni is the best. He follows through with all the details and answers all my questions.

Polite, attentive and caring staff and the doctor is top notch. Very glad to have found a good GI and caring staff. Highly recommend if you are looking for an amazing GI.

Professional, understanding, and excellent care.

Great friendly staff and an attentive Doctor that goes the distance ... and sincere concern for the patient . Well done Doc! Jc

Dr Simoni is very caring and his staff rocks!

all is good

Dr. Simoni and his staff are always professional and caring. The best of the best!

The staff is very courteous and professional. The doctor is very knowledgeable, very affable, and a great lister which some doctors don't do. The location is beautiful.

Very kind & we'll run office!

Great place! Cold waiting room. Ultrasound tech didn't talk or even say his name but good enough.

Very good experience

Great experience

Dr. Simoni is fantastic!!! He was able to see me quickly and diagnosed my situation easily. He was punctual, patient and genuinely concerned about my welfare. His staff is equally professional, efficient and pleasant. It was my first experience coming to a Gastro and I appreciate everything he and his staff did to put me at ease. ๐Ÿ‘๐Ÿ‘

Excellent care!

Dr. Simoni is honestly the best gastroenterologist out there! Genuinely cares about his patients and their well being. Would highly recommend!

Excellent Dr and staff very professional but also friendly

I love Dr. Simoni! Often faced with awkward conversations given the nature of his specialty, he never makes me feel embarrassed or uncomfortable. He's gentle and kind.

I think you all are wonderful. I look forward to my TIF procedure in the next few weeks!. Dr I appreciate your empathy with my condition.

Staff is great and professional. Dr simoni is the best

Dr. Simoni is great! Very caring of his patients, would highly recommend!

Everyone was very helpful. Staff and doctor very friendly

Great doctor!!

Very efficient, knowledgeable and friendly staff. Doctor Simoni spends time explaining everything and answering questions. Would highly recommend to others.

You are all very nice and dr. Simoni seems like he cares and genuinely has answered all my questions and I feel confident in what he has told me in terms of what is coming next. I plan to leave a public review after this is all said and done but I am confident you guys will do your best to get my life normal with crohn's.

You guys are great! Thank you.... Rick Mouwen

Dr and staff always friendly and professional.

Everyone was so nice and efficient. Very pleasant experience.

Great facility, everyone is so friendly! Dr. Simoni is awesome!


You are the greatest.

The whole house staff were professional and caring. The doctor who performed endoscopy also explained the procedure and the things I should expect thoroughly.

Had no wait at the office and everyone friendly

Great team!

The people are always friendly

Efficient and personable. Everyone.

The staff was friendlier than I expected and treated me with kindness and respect. I felt very comfortable during the entire process. The follow up calls were also appreciated. Thank you, Hope Clinical Research.


Always pleasant

Dr. SIMONI is the best Gastro doc ever. He save my life. I felt miserable before with heartburn all night long. His procedure got rid of all of that. thanks Doc

to Dr. Simoni, Tunesha, and all the staff for your efficient, thorough and fast response yesterday to my situation. It was amazing that in just a few hours you had arranged for me to have blood work done, and a CT Scan at the hospital. I appreciate so much the care you showed and the speed at which you got things done for me. Dr. Simoni โ€“ receiving your calls so quickly and explaining everything to me was wonderful. And recommending a surgeon and actually getting me in to see her so quickly, well, I am just very grateful. I feel positive that all will all work out well. Thank you again, and I will be in touch, as I am sure you will be.

Dr. Simoni allowed me a wonderful experience as he walked me through every step of my treatment meticulously. He was diligent in responding to my concerns and demonstrated his commitment to improve my health.

I had GERD for years; however I didn't have many of the more common symptoms, I did clear my throat frequently and had a lot of sore throats,which were always misdiagnosed. and a weak voice but also an odd itch on the inside of my chest. Dr Simoni not only diagnosed my condition quickly but also offered a more permanent solution. It has been six weeks since I had the T.I.F. procedure and the first time in years that I have not used a powerful proton pump inhibitor to sleep at night. Sore throats gone, chest itching gone no more throat clearing. Back on normal diet (eating less) and feeling great. Very nice and professional Dr. I always felt that I came first.

I don't hand out kudos to give anyone a good feeling. This man is genuine. He is a wonderful doctor. Locates the problem and treats it. He is a straight up guy and cares about his patient's welfare.

Dr. Simoni is an exceptional physician, compassionate, caring and wise beyond his years. He is an effective communicator, listens, shows sincere interest and seems open to different options and alternatives as long as it is not contrary to medically sound practice. His manner is positive, relaxed and respectful and he makes you feel completely confident in his ability to treat you. The TIF procedure he performed is relatively new and I feel he went above and beyond to ensure my concerns were addressed. The procedure can be life changing and Dr. Simoni's knowledge and expertise makes him one of the most qualified physicians to perform this procedure. His office is beautiful and clean and the staff always friendly, courteous, responsive and accommodating. I am so fortunate that I was referred to him and continue to feel my health is in good hands while in his care. I highly recommend him to family, friends and anyone needing a G.I. Specialist.

Dr. Simoni and his staff are awesome. Had a very good experience.

I was impressed with the staff and doctor, highly recommend. Excellent customer care and bedside manner.

Overall good experience!!!

I am very satisfied with the procedure. Everyone involved was professional, efficient, and made me feel comfortable.

I have complete trust in Dr. Simoni. I came out of the procedure with no pain. Results were explained clearly.

Dr Simoni is great


555 Marin St #270, Thousand Oaks, CA 91360