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Is it time for your colonoscopy? We offer patients the colonoscopy procedure at various ambulatory surgical centers. There are many situations or symptoms that require a colonoscopy. Often times a colonoscopy is a routine screening test to ensure overall healthfulness. However, if there is concern about ulcers, colon polyps, inflammation, bleeding, or tumors, you may need a colonoscopy.

A colonoscopy is an exam of the inner lining of the large intestine, rectum, and colon. During the test, a flexible tube, called a colonoscope, looks at the colon. At this time, tissue samples are often collected, biopsied, and any abnormal growths can be removed.

Before undergoing a colonoscopy, you will need to clean out your colon. This is often referred to as a colon prep. This can take 1-2 days, depending on the type of prep recommended for you, by your gastroenterologist, Dr. David Yamini. This bowel prep, may be your least favorite part of the colonoscopy. However, our Santa Monica Colonoscopy office and our Beverly Hills Colonoscopy office are both available to answer any questions and make your colonoscopy as easy as possible. It’s important to plan on being home during prep time before your colonoscopy because you will want to be close to your own bathroom.

During the colon prep, you may be hungry. However, you must be on a clear liquid diet. The colon prep for your Santa Monica colonoscopy or your Beverly Hills colonoscopy causes frequent loose diarrhea, to ensure your bowels are empty for the procedure. Dr. Yamini, and our office, will provide you with the exact steps for you and your colonoscopy.

After the Colonoscopy

Dr. David Yamini is a colon cancer specialist and always treats his patients with gentle and compassionate care, taking his time during all procedures. He wants to ensure that you feel good after your colonoscopy procedure and most of our patients feel fine quickly after their colonoscopy. You may feel a bit woozy from anesthetics, but our staff is here to watch you and make sure you feel good. You may notice increased gas, because air is pumped into the bowel during the colonoscopy procedure. This may cause temporary stomach cramps.

If you’re planning on having a colonoscopy in Santa Monica or a colonoscopy in Beverly Hills, we recommend taking the day off of work. Due to the medication used to help you sleep during the procedure, you may be too groggy to work. We also recommend having someone drive you home after your colonoscopy.

Colonoscopy Results

During a colonoscopy, Dr. Yamini will be looking for anything that could be causing you pain, or cancer. If he finds any small polyps, they will be removed during the procedure. Polyps, over time, can cause cancer. If Dr. Yamini finds anything concerning, such as a tumor, or large polyp he will conduct a biopsy, sending it to a lab where it’s checked for pre-cancer or cancer cells.

Do You Really Need a Colonoscopy?

Colonoscopies save lives and regular colorectal cancer testing, or colonoscopies, are the best way to prevent colorectal cancer. Dr. Yamini is a colonoscopy expert and wants to ensure that we prevent colorectal cancer before it starts. Through colonoscopies, cancer can be found in early stages, before it can spread and while it is very treatable.

Regular colonoscopies, or screening tests, is the best way to diagnose rectal cancer or colon cancer. If you have questions about having a colonoscopy or would like to see Dr. Yamini, of Westside Gastro Care, call our office today for an appointment (310) 285-3005 or contact us here with your preferred appointment time and date and our staff will call to confirm. Please let us know if you are looking to visit our Santa Monica or our Beverly Hills office for your colonoscopy.

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Our Patient Reviews

David P. Yamini, MD

4.9 / 5.0

Based on 58 reviews

Nicole R.

Scheduling was extremely easy with Dr. Yamini's staff, I scheduled my Tuesday appointment on Monday afternoon. The staff and Dr. Yamini were courteous and straightforward - even with new patient paperwork I was out the door within an hour!

Bill C.

Dr. Yamini definitely is a great doctor who is very thorough and detail oriented with his diagnosis. He is very passionate about what he does and was able to answer any question or concern. He took his time before my appointment to look through all the documentation to know exactly what was going on. He definitely was able to put me at ease even though I was very worried. I am very satisfied with his services. Thanks!

Mario O.

He was very gentle about my situation yet did not fail to emphasize about the seriousness that could arise from gastrointestinal problems. Few and far between are as professional and caring as Dr. Yamini and his staff. I was 20 minutes late on Friday evening & they still had me in a room in 5 minutes as a new patient.

Lisa P.

I can’t say enough great things about my first impression of this doctor and his amazing staff! They got me right in and set me up for everything needed. I’ve been looking for the right GI doctor for years having had a very negative experience with another doctor years ago. Dr. Yamini is not only professional, knowledgeable, respectful, and experienced... this guy is “cool” and nice too! His front desk person, Toni was amazing! She was kind, bright, efficient, patient, and positive! ??

Kendall S.

Makes talking about uncomfortable subjects a breeze. Competent and honest: doesn't sell vitamin cleanses and his own probiotics or anything like that. Makes sure your symptoms aren't half-fixed but fully fixed. Gets to the heart of the issue quickly. Good listener. Very sweet receptionist. I hate receiving many phone calls, and she's persistent about making sure you set up an appointment; it was stressing me out. I found the her much easier to connect with once she gave me her cell and said to text.

Babak E.

Thank you Dr. Yamini and Tony. When it comes to patient care and professionalism, I have never received this much care and attention from a physician and the staff. I was able to talk to Dr. Yamini for good period of time allowing me to ask all my questions. Tony you are so cute thank you for scheduling me in last minute.

Kyle K.

I highly recommend Dr. Yamini. He's very personable and actually listens to your issues and concerns, then recommends a reasonable course of action. He was able to properly diagnose my symptoms and get me healthy again. Also his admin Toni is great too, she will help select a facility and verify that your insurance will fully cover. She's really nice and trustworthy as well!

Eric W.

Thorough doctor who cares about his patients, and very meticulous about the details of your ailment. Clearly very knowledgeable and skilled. No wait time for appointments, and the nurse (Toni) is very friendly and follows up appropriately. One of the best doctor experiences I've had and I'd recommend it to anyone.

Office Hours


8:30AM - 5:30PM


8:30AM - 5:30PM


8:30AM - 5:30PM


8:30AM - 5:30PM


8:30AM - 5:30PM





Contact Us

Santa Monica Office

2001 Santa Monica Blvd #1286
Santa Monica, CA 90404

(310) 285-3005

(310) 935-1560

Beverly Hills Office

8920 Wilshire Blvd, Ste. 310
Beverly Hills, CA 90211

(310) 953-3550

(310) 935-1560