About Leo Treyzon M.D.

About Leo Treyzon M.D.
  • Credentials & Education

    • Undergraduate: University of California, Santa Barbara
    • Medical School: University of California, San Diego
    • Internship: Cedars Sinai
    • Internal Medicine Residency: Cedars Sinai
    • Gastroenterology Fellowship: University of California, Los Angeles
    • Masters of Science, Clinical Research: University of California, Los Angeles
  • Academic Appointments

    • Clinical Chief, Division of Gastroenterology Cedars Sinai Medical Center
    • Assistant Clinical Professor, UCLA Geffen School of Medicine
  • Four Board Certifications

    • Gastroenterology & Hepatology: American Board of Internal Medicine, Subspecialty Gastroenterolgy – 2008
    • Internal Medicine: American Board of Internal Medicine – 2004
    • Bariatric Medicine (Obesity Medicine): American Board of Obesity Medicine – 2012
    • Clinical Nutrition: American Board of Physician Nutrition Specialists (ABPNS) – 2004
  • Rated #1 Gastroenterologist in LA

    Dr. Treyzon is rated the best gastroenterologist in Los Angeles by patient reviews on RateMDs.com. This site offers a forum for patients to rate their overall experience with a physician.Read More »

  • Television & Video Appearances

    Dr. Leo Treyzon answers a handful of questions on his appearance on the Dr. Oz Show. Among other things, Dr. Leo gives his 5 top tips for living a long, healthy life.Read More »

What We Treat

What We Treat
  • Colon Polyps & Colorectal Cancer

    Cancer of the colon is a major health problem in the United States. It ranks as a leading form of cancer, along with lung and breast cancer. Importantly, colon cancer is also one of the most preventable and curable forms of cancer. When detected early, more than 90 percent of patients can be cured. This… Read More »

  • Constipation

    Constipation can be defined as infrequent or hard pellet stools, or difficulty in evacuating stool. Passing one or more soft, bulky stools every day is a desirable goal. ‘While troublesome, constipation is not usually a serious disorder. However, there may be other underlying problems causing constipation and, therefore, testing is often recommended. What Causes Constipation?… Read More »

  • Diarrhea

    Everyone has diarrhea at one time or another and everyone has their own idea of exactly what diarrhea is. Is it one liquid stool each day? Is it several soft, semiformed stools each day? Or is it frequent, watery stools throughout the day and even the night? Stool is made up mostly of water. For… Read More »

  • Gas & Bloating

    Everyone comments sometimes on the digestive problem of gas. When people complain of gas, they usually mean one or more of the following: Frequent belching of air from the stomach Bloating of the abdomen after eating Frequent passing of gas from the rectum It may be uncomfortable or inconvenient, but only rarely is gas associated… Read More »

  • Gastroesophageal Reflux Disease (GERD)

    Almost everyone has experienced heartburn. About 25 million American adults suffer daily from heartburn. It is that burning sensation felt behind the breastbone and sometimes in the neck and throat. Heartburn is caused by stomach acid refluxing or splashing up into the esophagus—the muscular tube that connects the throat to the stomach. Occasional heartburn is… Read More »

  • Irritable Bowel Syndrome (IBS)

    Medically, irritable bowel syndrome (IBS) is also known as: spastic colon, spastic colitis, mucous colitis and nervous or functional bowel. Usually, it is a disorder of the large intestine (colon), although other parts of the intestinal tract—even up to the stomach—can be affected. The colon, the last five feet of the intestine, serves two functions… Read More »

Our Services

What We Treat
  • Medical Consultation

    At the time of your medical consultation, the doctor meets with you for approximately 30 to 90 minutes to review your symptoms, prior treatments, medical and surgical history, medications, family history, and other pertinent background information. After a full physical examination is performed, a treatment plan is then formulated. Often, there is a prescription made… Read More »

  • Breath Testing

    Breath testing is used as a clinical medical diagnosis for people with various digestive disorders. Testing is simple, non-invasive, and is typically performed after a short period of fasting. Conditions and diseases that we test for include small intestinal bacterial overgrowth, lactose intolerance, fructose intolerance, and Helicobacter pylori (H. pylori). Lactulose Hydrogen Breath Test The… Read More »

  • Upper GI Endoscopy

    Upper GI endoscopy, sometimes called EGD (esophagogastroduodenoscopy), is a visual examination of the upper intestinal tract using a lighted, flexible video endoscope. The upper gastrointestinal tract begins with the mouth and continues with the esophagus (food tube) which carries food to the stomach. The J-shaped stomach secretes a potent acid and churns food into small… Read More »

  • Colonoscopy

    Colonoscopy is the visual examination of the large intestine (colon) using a lighted, flexible video endoscope. The colon begins in the right-lower abdomen and looks like a big question mark as it moves up and around the abdomen, ending in the rectum. It is approximately 4 feet long. The colon has a number of functions… Read More »

  • PillCam Capsule Endoscopy

    Ingestible capsule equipped with a miniature video camera to visualize the small intestine. Non-invasive alternative to conventional endoscopic and radiological procedures to help diagnose and evaluate disorders of the small intestine including suspected Crohn’s disease, celiac disease, unexplained bleeding, intestinal cancer, NSAID related ulcer, etc. The only device able to visualize all 21 feet of… Read More »

  • Laboratory Services

    A full spectrum of blood and stool tests is available, and we offer genetic testing for several conditions. The turnaround time ranges from several hours to two weeks, depending on the nature of the test. Radiology A full spectrum of different x-ray techniques is available. These include the following: Computed Tomography (CT) and CT Enterography.… Read More »

The Office

The Office
  • Our Mission Statement

    We are committed to providing the highest quality patient care through a spirit of teamwork, efficient communication, medical innovation and professionalism. We work in a collaborative manner with our patients, their families, and their healthcare providers. We take the time to properly educate our patients and their families to help increase their understanding of the… Read More »

  • Meet the Staff

    We are committed to providing you quality patient care in a friendly, welcoming environment. Our collaborative service focuses on your health, comfort, privacy, and convenience. Find out more about the hard-working team dedicated to making your patient experience a positive and successful one. Leo Treyzon, M.D. Clinical Chief, Division of Gastroenterology Cedars Sinai Medical Center… Read More »

  • About the Surgery Centers

    Dr. Treyzon performs his procedures at Cedars Sinai Medical Center or La Peer Health Systems outpatient surgery center, both conveniently located in Beverly Hills, CA. La Peer Health Systems 8920 Wilshire Blvd Suite 101 Beverly Hills, CA 90211 Phone: (855) 360-9119 Hours: Mon-Fri 6am – 5pm La Peer Health Systems Website Cedars Sinai Medical Center… Read More »

  • Patient Forms

    For added convenience, our patient information forms are available to you online. These can be downloaded and completed prior to your visit. Any printed forms will need to be sent to our office or brought in at the time of your visit. The forms you need will depend on whether you are a new or… Read More »

  • Billing & Financial Policies

    We accept insurance coverage for the following insurance providers: Medicare, Anthem Blue Cross, Motion Picture Insurance, United, Aetna, Cigna, Healthnet, PacifiCare, Tricare, and other insurance companies. We are contracted in-network providers for certain insurance companies and out-of-network providers for other insurance companies. We will bill your insurance and await their explanation of benefits according to… Read More »

  • Parking for Dr. Treyzon’s Office

    Click Here to View Parking Map Parking is available in the West or East Garages of the Cedars Sinai Medical Office Towers on Third Street. The rate is $2.25 per 15 minutes up to a daily maximum of $15. Parking is also available in the Cedars Sinai P1, P2, and P4 lots (see map) for… Read More »

Patient Reviews

Patient Reviews
  • Dr. Treyzon’s Thoughts About Online Reviews

    In our office we are supporters of the patient feedback process. We encourage our patients to tell us what is positive about their experience as well as constructive critiques on how to improve their patient experience. However we are somewhat skeptical of online reviews.  Read More »

  • Our Own Patient Testimonials

    We truly appreciate each and every one of our patients and are very thankful that they’ve taken the time to write to us. Below are some of the hand written notes we’ve received from our patients. Read More »

  • Yelp.com Reviews

    • Terri D. wrote: What can you say about this Doctors office, other than, your comfortable from the moment you walk in the door. He’s wonderful, Doctor Treyzon is more than the best, he doesn’t rush you ,he’s sincere, he cares, explains everything, very calm, greets you by name as soon as you enter the office. His assistant Christie,… Read Review »
    • J. Marvin C. wrote: Never thought I’d be reviewing a colonoscopy, but somebody’s got to do it. Long story short: Dr. Treyzon made pleasant a most unpleasant situation. I knew he was the guy when after I said, lying on the table, “You know, there’s nothing I like better than being in a clinical environment and having my narcotics… Read Review »
    • Jana T. wrote: Simply put, Dr. Treyzon helped me when no other doctor could! I was referred to him by my colon rectal surgeon after suffering a stubborn Ulcerative Colitis flare. I went to other gastroenterologists and was put on several horrible medications and nothing improved my condition. I met with Dr. Treyzon and he ran several tests… Read Review »
    • Jennifer W. wrote: When it comes to healthcare, you definitely want the best. It might not be the most expensive but should be quality. You don’t want to go to a medical doctor only to return in a few days complaining about the same problem. Leo Treyzon is a medical doctor specializing in gastrointestinal problems and general health… Read Review »
    • Marilyn B. wrote: 10/20/13 I am currently a patient of Leo Treyzon, MD. I want to share my very positive experience (rating 5 stars) regarding his care. I have found Dr. Treyzon to be the following: 1. Competent- I was having GI issues and my primary care doctor suggested I see Dr. Treyzon. In my first meeting with… Read Review »
    • Debi W. wrote: I started seeing Dr. Treyzon a few years ago as a preventative measure due to family history of Gastrointestinal issues. He is extremely knowledgeable, kind, caring, compassionate and very dedicated to his patients. All of my experiences with Dr. Treyzon have been extremely positive — from routine office visits to the colonoscopy/endoscopy procedures — he… Read Review »
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  • Vitals.com Reviews

    • Laura D. wrote: It’s just so nice to know that a Doctor really has your best interest at heart. He listens to me and is very thorough. My first visit he took nearly an hour with me. Sometimes, you have to wait for a while in the waiting room, but it is only because when you have an… Read Review »
    • Anonymous wrote: on a scale of 1-10…i rate Dr.Treyzon”11″in this day and age most doctors treat their patients as a number…not so with this doctor!he REALLY cares about you and actually listens to what you have to say.if you have to call him about a question he calls back THE SAME DAY!!!!i just had a colonoskipy that… Read Review »
    • Tamar wrote: I HIGHLY RECOMMENT DR. TREYZON. He is the most knowledgeable, and up-to-date in his field. He cares about his patients, and shows it. He WILL make all of his patients feel better. He gets to the root of the problem, and will heal you. Read Review »
    • Susan G. wrote: Dr. Treyzon is a wonderful doctor who loves what he does and it shows. I had been suffering from nausea and weakness for about a month when I went to Dr. Treyzon. I went to my physician before coming to Dr. Treyzon and she couldnt figure out my problem but Dr Treyzon was able to… Read Review »
    • Anonymous wrote: Dr. Treyzon took care of me during the most trying of times for me from a physical perspective. Without his attention to detail and quality of care I would most certainly have felt lost and uncertain as I navigated through the multitude of tests and medical professionals who hovered over me as I recovered. His… Read Review »
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