Biography & Education


Additional Information

Dr. Kratz specializes in the diseases of the Colon and Rectum with an interest in the prevention of colon and rectal cancer, the treatment of HPV disease, and Robotic colon and rectal surgery. He is a Fellow of the American College of Surgeons and is a member of the American Medical Association, American College of Surgeons, American Society of Colon and Rectal Surgery and Northwest Society of Colon and Rectal Surgeons. 

Married with three children, Dr. Kratz enjoys soccer, crossfit, snow boarding, hiking and music.

  • Colon/Rectal Surgery
Education Background
Medical School Indiana University School of Medicine
Residency General Surgery, Indiana University
Fellowship Colon and Rectal Surgery, Northwest Colon and Rectal Clinic, Seattle, WA
  • English
Professional Associations
Personal Interests
Soccer, Snowboarding, Crossfit

Care Locations

751 N.E. Blakely Dr.
3rd Floor
Issaquah, WA 98029
Fax 425-313-7175
1801 N.W. Market
Ballard Campus, Suite 207
Seattle, WA 98107
Fax 206-386-2452
1101 Madison St.
First Hill Campus, Suite 510
Seattle, WA 98104
Fax 206-386-2452
751 N.E. Blakely Dr.
Issaquah, WA 98209
Accepted Payment Methods
Medicare, Bill Insurance, VISA, Master Card, Cash, Check
Accepting Medicaid



What is Pilonidal Disease?

May 22, 2013

Pilonidal disease is a subcutaneous skin infection that occurs in the upper half of the gluteal cleft (the tailbone area, and/or between the buttocks). 


The term “Pilonidal” means nest of hairs.  Interestingly, in 50% of reported cases, there was not any hair found within the pilonidal abscess.  This is routinely the case for females.  Although hair can contribute, the most common cause of pilonidal disease is an exploded follicle called a pit, which is located in the gluteal cleft, or midline region (between the buttocks). 

Who is at risk for Pilonidal disease?

Pilonidal disease is only slightly more common in men than women, and is most likely to occur between the ages of 16 – 26, correlating with puberty.  It should be noted that pilonidal disease can develop in younger and older age groups.  Pilonidal disease occurs less in Asian and black populations.  Other ri...

How to prepare for a colonoscopy & what it's like

March 01, 2012

In many cases, people who have had colonoscopy will say that the procedure itself was fine, since it is performed while the patient is under sedation. However, people tend to feel less favorable about the prep involved prior to the procedure. I recently had my first colonoscopy and decided to document my personal experience of the prep process on video to share with others.



Other frequently asked questions about colonoscopy:


  • Colon/Rectal Surgery
Clinical Interests
  • Anal Surgery
  • Cancer Surgery
  • Colon Cancer
  • Colon Cancer Dx
  • Colon Cancer Prevention
  • Colon Cancer Screening
  • Colonoscopy
  • Colorectal
  • Colorectal Cancer
  • Colorectal Screening
  • Colorectal Surgeons
  • Crohn's Disease
  • Diverticulitis
  • Hemorrhoid Surgery
  • Hemorrhoids
  • Inflammatory Bowel Disease
  • Irritable Bowel Syndrome
  • Laparoscopic Surgery
  • Polypectomy
  • Sigmoidoscopy
  • Surgery
  • Swedish Cancer Institute
  • Ulcerative Colitis


Patient Ratings and Comments
About Our Survey

The Patient Rating score is based on responses given during the CAHPS Patient Experience Survey. Responses are measured on a 10-point scale, with 10 being the best score. These scores are then translated to a 5-point scale in order to display results in a 5-star rating. Comments are also gathered from the same survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing the comments.

4.4 out of 5 (60 Ratings, 10 Comments)


*Dr. Kratz did an excellent job of of taking care of me, I appreciate all his efforts on every level.
Swedish Patient

*Dr. Kratz and [...] turned what could be a bad experience into something better.
Swedish Patient

Swedish Patient

*Dr. Kratz exceeds excellence; I've returned to see him in Seattle even though I live in Annapolis, MD!
Swedish Patient

The Dr. seemed disengaged. Maybe even tired looked. His disinterest gave an air of lack of respect.
Swedish Patient

Recommending friends stay away. He wanted to go home. [...] My visit seemed like an inconvenience.
Swedish Patient

He's great!
Swedish Patient

*Dr. Kratz is outstanding - one of the best!
Swedish Patient

Absolutely already have.
Swedish Patient

Dr. Kratz was very rough with the procedure like he was in a bad mood [...]. I would have left his office if I was not desperate and in pain. Dr. Kratz was also very unreceptive to questions about alternative remedies. I will never go back to see him.
Swedish Patient