Gastroenterologist Los Angeles

Gastroenterologist Los Angeles

SiamakTabib, M.D. is a top Gastroenterologist in Los Angeles, Calif. He received his bachelor’s degree from UCLA and medical degree from the David Geffen School of Medicine. Dr. Tabib went on to complete his internship and residency in Internal Medicine at Cedars-Sinai Medical Center, as well as a fellowship in Gastroenterology and Hepatology at UCLA. He specializes in diagnosing gastrointestinal problems, and is well-known among his peers for his outstanding work as a Gastroenterologist in the Southern California region.

  • Gastroenterology and Hepatology
  • Private Gastroenterologist Los Angeles Practice
  • Diagnostic and Therapeutic Endoscopy
  • Metabolic Support and Nutrition
  • Attending-Metabolic Support Team and Nutrition
  • Attending-Liver Transplant/Hepatology Teaching Rounds
  • Expert Reviewer, Medical Board of California
Los Angeles Gastroenterologist
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Professional Memberships

Voted as Best Doctor by in 2010, 2011, 2012, 2013, 2014, 2015 and 2016.
2014 Vitals Patients' Choice Award
2014 Vitals On-time Doctor Award

Gastroenterology Los Angeles

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Preventative Medicine
Colorectal Cancer Prevention

Cancer of the colon or rectum is often called colorectal cancer. This type of cancer usually arises from polyps, which are growths of tissue found in the lining of the colon or rectum. These polyps may be benign (non cancerous) or malignant (cancerous) which can spread to other parts of the body.

Contact Us
Los Angeles Gastroenterology

Siamak Tabib, M.D., Inc.
Gastroenterologist Los Angeles, 8631 West Third Street, Suite 1015E, Los Angeles, CA.

(310) 652-4472 (Off) (310) 358-2266 (Fax)
Schedule a Consultation


Dr. Siamak Tabib's Blog

Subject covered:   Gastroenterology problems, Colon Polyps, colon cancer and other GI preventative tips.

  • [Image:] It should be known that there are four very common types of polyps that can be found in a patient’s colon. These can be detected through routine medical procedures. A polyp is often one of two different shapes. It…

  • What is Gastrointestinal Bleeding? Gastrointestinal bleeding, or GI bleeding, can happen in virtually any area of the digestive tract. It can occur in the stomach, esophagus, intestines, anus, or rectum. However, the bleeding is not easily noticed. It may start…


Gastroenterologist Los Angeles Dr. Tabib answers questions about GI issues:

Q: Why is a Colonoscopy important?

A: Polyps can be found in patients over 40 almost 50% of the time. Finding cancerous polyps in the earliest stages is important because they can be 90% curable. This is why it is so important to have a colonoscopy.

Q: Is it common to find cancerous polyps in a Colonoscopy?

A: It is very rare to find cancer in polyps. Sometimes microscopic cancer cells may exist but they are very very small. The idea is to identify and remove any potential polyps that have cancer potential.

Q: Are there risks of undergoing a Colonoscopy?

A: The procedure is a very safe procedure. But, with any procedure there are risks involved when using anesthesia but everything is carefully monitored by the doctor and his team to ensure the reduction of all risks to the patient.

Q: How often should I get a Colonoscopy?

A: It is recommended that everyone seek a doctor for a colonoscopy starting at the ages between 45-50. In general, physicians recommend that patients receive a colonoscopy every 5 years, and even more frequently for those patients whose family history includes colon cancer who should get checked every 3-5 years.