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Welcome to the Home Page of the Center for Colon and Rectal Surgery. In 2002 Dr. Khoo relocated his practice from Colorado to Sonoma County in Northern California. Dr. Khoo practiced in Denver from 1992-2002 where he built a major tertiary referral center for colon and rectal surgery. He left the crowded urban life and has come to the Wine Country to serve the community. No longer will you have to travel far for your colon & rectal surgery needs - you can get care here.

We are the premier center for the diagnosis and treatment of all colon and rectal problems. The Center offers unsurpassed experience and skill in the management of these problems. Dr. Khoo is fellowship trained in colon and rectal surgery. He is the only Board Certified Colon and Rectal Surgeon in Sonoma, Napa, Mendocino, Lake, Del Norte and Humboldt counties.

Dr. Khoo is Board Certified in General Surgery as well as in Colon and Rectal Surgery. Unlike a general surgeon, Dr. Khoo takes the management of colorectal disease one step further. Our center is in Santa Rosa and patients come from all over California. We have received referrals from all over the United States and even Alaska and Hawaii. Patients have come from Canada and Mexico for treatment. One patient came for bowel surgery from the United Arab Emirates. Recently a patient arrived from Rome, Italy for surgery.

Ask if your hospital has a Board Certified Colon and Rectal Surgeon.
Is your surgery going to be performed by a Board Certified Colon and Rectal Surgeon or a general surgeon?
Why should you ask?
Because Colon and Rectal Surgeons achieve lower complication rates and lower mortality rates than general surgeons. In the past 9 years, many articles were published in the medical literature measuring quality of surgical care based on survival, complication rate, use of colostomy, length of hospitalization, functional outcome, and cost. In virtually every article and by every measure, surgeons with more specific training and greater operative volumes perform better. Yet, the medical profession has not embraced these findings.
For more information go to Colorectal Surgeon comparison with general surgeon. as I cite literature specific to the treatment of anorectal problems.

Dr. Khoo's perspective on Cost Effective Colorectal Surgery.

Open Enrollment

Safety Comes from High Volume Providers

Colorectal Surgeons Have Better Surgery Mortality Rates

The Bell Curve by Dr. Atul Gawande in New Yorker Magazine

If you have an urgent problem - we will try our best to see you as soon as possible.

Map of the Center's Location

For New Patients and for general information about our office, please click on For Patients. That page also contains important insurance information.

For the newest information about What's New at the Center and many other colorectal topics, click on the What's New section. You will read the latest about Laparoscopic Colectomy, Virtual Colonoscopy, Screening for Colorectal Cancer and other interesting topics.

Dr. Khoo was interviewed about colon cancer in the movie "Change" which includes many Sonoma residents like Tommy Smothers. For details click on Change - the Movie. You will see Dr. Khoo in the movie trailer. That movie has been accepted at the Washougal International Film Festival and was shown at the San Fernando Valley International Film Festival in October, 2008.

If you are a patient needing more details about general as well as interesting colon and rectal surgery topics, please click on the Medical Information section.

To learn about our clinic, please click on the About Us section.

If you are from out of town, and many of our patients are, please click on the For Patients section - that has a lot of information about lodging and restaurants near our Center. This information is under the Visitor Assistance section.

Have you ever considered having hemorrhoid surgery? Perhaps you were concerned about the pain with hemorrhoidectomy. You may be worried about losing too much time off work. The Center offers a better surgical procedure for hemorrhoids - PPH or Stapled Hemorrhoidectomy. This procedure is virtually painless and allows the patient to return to work faster. Please visit our "What's New" section or click on

PPH or Stapled Hemorrhoidectomy.

STOP Colon and Rectal Cancer. Do you want to do something to STOP Colon and Rectal Cancer? If you do, go to

STOP Colon and Rectal Cancer Foundation.

This foundation was started by Dr. Ernestine Hambrick in 1997. Her older brother died of colon cancer at 55 so she retired from her colon and rectal surgery practice to devote her time to the STOP Foundation.

Sonoma County is declared a Colon Cancer Awareness Zone

On February 15, 2005, City of Santa Rosa Mayor Jane Bender read a proclamation that declared March as Colorectal Cancer Awareness Month and proclaimed the City of Santa Rosa Council and employees a "Colon Cancer Free Zone." This action was taken, with the encouragement of the American Cancer Society, to help save lives. A Colon Cancer Free Zone is a community education project to promote awareness, early detection and prevention of colorectal cancer.

City of Santa Rosa Colon Cancer Free Zone Declaration
Since that day, Sheryl Khoo with the American Cancer Society met with the Mayor of each major city in Sonoma County. With their approval, a presentation to each City Council and a proclamation was made to make their city a Colon Cancer Awareness Zone.

Every March is Colon Cancer Awareness Month. To raise public awareness about this common cancer, the President has declared March to be National Colon Cancer Awareness Month. You can find out more by going to:

National Colorectal Cancer Awareness Month.

National Colorectal Cancer Research Alliance Katie Couric helped to create the NCCRA to fund research and other efforts to prevent and treat colorectal cancer. Please go to this valuable website. You will see many celebrities speaking out for more screening and how it saves lives. Please go to:

National Colorectal Cancer Research Alliance.

Also visit the Colon Cancer Coalition at getyourrearingear.com

Thank you for visiting. If you need more information, please do not hesitate to contact us.

Copyright © 2009 Center for Colon and Rectal Surgery, 864 Second Street, Santa Rosa, California 95404 U.S.A. All rights reserved.