Gastroenterology is the field of medicine that diagnoses and treats conditions of the stomach, gallbladder, pancreas, liver, small intestines, colon, rectum, and the ducts between the organs.

digestive tractDigestive diseases can be severely disruptive to daily life. The digestive tract is very complex and there is a wide array of symptoms that can indicate disease. Gastric symptoms should be investigated, as they are often symptoms of underlying conditions.

La Peer Health Systems' Gastroenterology Department has a team of expert gastroenterologists and surgeons to diagnose, treat, and follow up on your GI condition so you can make the most of life.

In addition to our highly-trained doctors, we have a team of highly-trained nurses to provide health care and ensure that you are comfortable at all times. La Peer Health Systems was also named one of the 100 Greatest Places To Work by Becker's ASC Review. We take great pride in our professional and courteous staff and are honored to be included on Becker's 2013 ASC Review.

There are many GI symptoms and GI conditions treated by our team.  The focus of our Gastroenterology Department is to treat chronic digestive conditions and perform non-emergency procedures including:

Gastrointestinal Conditions and Symptoms

Gastrointestinal Procedures

Common GI conditionsIf you are interested in learning more about any of the procedures that are part of the La Peer Health Systems Digestive Disease Program, please contact us here. You may also reach us by phone, please call (855) 360-9119 and ask to speak with the Department of Gastroenterology, or contact any of our physicians directly.

You can also learn more about acid reflux on our Reflux Surgery Center of Excellence department website.

For more information please visit our Colonoscopy Center of Excellence website, dedicated 100% to colon cancer screenings!

La Peer Surgery Center- La Peer Health Systems Digestive Disease Program
(855) 360-9119
8920 Wilshire Blvd #101
Beverly Hills, CA 90211
[email protected]

Recent Gastroenterology (GI) Blogs

Dr. Treyzon's 5 Tips for Living Longer

Living longer, feeling younger and being more active are the 3 most common goals for adults everywhere... read more »

How Do You Get Inflammatory Bowel Disease (IBD)?

Inflammatory bowel disease, or IBD, affects an estimated 600,000 Americans a year... read more »

7 Lifestyle Changes for Managing Acid Reflux

Acid reflux disease, or gastroesophageal reflux disease (GERD), is a chronic condition in which stomach content leaks backwards and irritates the esophagus, causing persistent heartburn.. read more »

Hemorrhoid Treatment Options: Banding or Hemorrhoidectomy

More than half of all Americans will suffer from hemorrhoids at some point in their lives.Hemorrhoids (also called piles) are enlarged veins in the anus or lower rectum and can be located internally or externally... read more »

5 GI Doctor Tips for a Healthier Digestive System

In honor of February being Cancer Awareness month, the Beverly Hills GI doctors at La Peer Health Systems are reminding Americans to take steps to promote good digestive and colorectal health... read more »

Virtual Colonoscopy: Less Safe than Traditional Screening

Many people are reluctant to schedule a colonoscopy. Even though colonoscopies are widely regarded as the best way not only to diagnose but also to prevent colon cancer... read more »

Change Your Life, Change Your Colon Cancer Risk

We all know that our lifestyle choices play a significant role in our overall health and wellness... read more »

Colonoscopy & Other Colon Cancer Screening Methods

Did you know that colon cancer is the second leading cause of cancer deaths among both men and women? Although it is a slow growing cancer... read more »

GI Problems: Treating IBS & GERD With Lifestyle Changes

As people mature, it is important that they are aware of certain GI problems, that if not detected/diagnosed... read more »

Gallstones and Children: A New Trend

According to the Center for Disease Control and Prevention, about 20 million American adults are estimated to have gallstone disease... read more »

La Peer Sponsors Fundraiser for TEEN LINE

According to the Center for Disease Control and Prevention, about 20 million American adults are estimated to have gallstone disease... read more »

La Peer Sponsors Fundraiser for TEEN LINE

Our mission as an outpatient surgery center is to provide the highest quality in patient care, and it doesn't stop at the operating room... read more »

Everything You Need to Know about Appendicitis

Appendicitis is a potentially life-threatening medical condition that occurs when the appendix becomes infected or inflamed due to a blockage... read more »

A Colonoscopy With a Gastroenterologist Offers the Lowest Risk

When men reach the age of 50, or 45 if they are African American, each go through a right of passage known as a colonoscopy... read more »

Iced Tea Drinking Could Lead to Kidney Stones

A cool, refreshing glass of iced tea can be incredibly satisfying on a hot, summer day. Unfortunately, this summer time treat can contain one of the key ingredients for kidney stones... read more »

Get To Know the La Peer Department of Gastroenterology

Gastroenterology focuses on the health of the digestive system. Gastroenterologists diagnose and treat conditions of the stomach... read more »

Most Americans Don’t Know They Have Celiac Disease

Sometimes stomach pain can mean a whole lot more than merely eating too quickly or simple indigestion. According to results from a new... read more »

Relief For Incontinence

Urinary incontinence, or the involuntary loss of urine, affects millions of women in the United States. While many attribute the disorder... read more »

Chronic Heartburn Can Be An Indicator of Cancer

Many people find the symptoms of heartburn to be uncomfortable, but persistent pain could be indicative of a more serious medical condition called Barrett’s esophagus... read more »

Treating hemorrhoids before pregnancy is key

As you may or may not know, hemorrhoids can be itchy and mildly uncomfortable – or downright painful. Pregnancy can be uncomfortable and painful as well... read more »

Holistic Gastroenterology

Traditionally, medicine is problem-focused.  Doctors tend to focus on a specific problem and will try to find a cure for it... read more »

Cancer Rates in the United States are Decreasing

According to a new study released by the American Cancer Society, cancer death rates have been decreasing between 2004 and 2008. The study found that cancer rates have dropped 1.8% per year in men and 1.6% ... read more »

Guide to Cancer Screenings

Most women know to get a pap smear once a year.  Some people know they are supposed to get a mole check yearly.... read more »

Hemorrhoid prevention tips

Hemorrhoids are a very common health problem, in which a lump or mass of tissue in the anus contains enlarged blood vessels... read more »

The importance of knowing your family's health history

Having a good understanding of your family's health history is essential in disease prevention. Many of the most common and fatal disease... read more »

Wireless Capsule Endoscopy

Endoscopy is a procedure that allows medical professionals to look inside your body. Instruments called endoscopes have cameras attached to long, thin tubes - which are inserted into various orifices of the body to examine... read more »

What to Expect from Gastrointestinal, Colon and Rectal Procedures

Here at LaPeer surgery center we're busy all year round, and with so many patients walking through our doors there are always some (in fact probably most) who feel nervous about any procedure that they may have... read more »


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Dr. Siamak Tabib
Siamak Tabib, MD
Dr. Tabib incorporates both health maintenance and disease prevention in his practice of Gastroenterology and Hepatology. read more
Dr. Payman Khorrami
Payman Khorrami, MD
Dr. Khorrami is fuent in English, Farsi and Spanish. He enjoys art and poetry, and is active in sports, especially swimming and running. read more
Dr. Mark Davidson
Mark Davidson, MD
Dr. Davidson received his medical degree from David Geffen School of Medicine at UCLA.  He then completed a three year residency program in internal medicine read more
Dr. Arash Nowain
Arash Ari Nowain, MD
Dr. Arash Ari Nowain is double board certified in Gastroenterology and Internal Medicine. He received his medical degree from the University of Southern California, read more
Dr. Leo Treyzon
Leo Treyzon, MD, MS
Leo Treyzon, MD, MS is a gastroenterologist. He is an active member in four Centers of Excellence at Cedars Sinai: Weight Loss Center , Esophageal Disorders Center, read more
Dr. Peyton Berookim
Peyton Berookim, MD
Dr. Peyton Berookim is a digestive and liver disease specialist practicing in Beverly Hills.  He completed three years of fellowship training (specialty) in Gastroenterology and Liver Diseases read more
Dr. Maurice Elihu
Maurice Elihu, MD
Dr. Maurice Elihu is a Diplomate of the American Board of Internal Medicine and American Board of Gastroenterology. Dr. Elihu's main areas of interest are comprehensive evaluation read more
Dr. Farshid Sam Rahbar
Farshid Sam Rahbar, MD
Dr. Farshid Sam Rahbaris the leading integrative gastroenterologistin Los Angeles, California.Dr. Rahbar incorporates anti-aging & functional read more
Dr. Shahab Mehdizadeh
Shahab Mehdizadeh, MD
Dr. Mehdizadeh is board certified in gastroenterology, internal medicine and nutrition.  He obtained his Bachelors and Masters degrees from the University of California Los Angeles (UCLA) read more