Department Gastroenterology & Hepatology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English, German, Korean
Surgeon No
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus

Specialties & Treatments

Treatment & Services

  • Cancer Center
  • Colonoscopy
  • Cryotherapy
  • Cryotherapy for Barrett's Esophagus
  • Endoscopic Retrograde Cholangiopancreatography
  • Endoscopic Ultrasound
  • Endoscopy
  • Esophageal Ablation
  • Esophageal Dilation
  • Percutaneous Endoscopic Gastrostomy (PEG)
View all 10 Treatment & Services +

Specialty in Diseases & Conditions

  • Barrett's Esophagus
  • Colon Polyps
  • Esophageal Cancer
  • Esophageal Diseases
  • Esophageal Stricture
  • Esophagus Disease
  • Gallbladder Cancer
  • Gallbladder Disease
  • Gallstones
  • Gastritis
  • Gastroenteritis
  • Gastroesophageal Reflux (GERD)
  • Pancreatic Cancer
  • Pancreatic Disease
  • Pancreatitis
  • Primary Sclerosing Cholangitis
  • Rectal Bleeding
View all 17 Specialties +


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About Sunguk Jang, MD

Sunguk Jang, MD, is a Staff physician in the Department of Gastroenterology and Hepatology at Cleveland Clinic's main campus. Dr. Jang is board-certified in gastroenterology and internal medicine.

Dr. Jang's interests include: Barretts esophagus, pancreatic and biliary disease, colon cancer screening, endoscopic ultrasound of esophageal, gastric and pancreatic disease and capsule endoscopy.
Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Gastroenterology/Advanced Endoscopy
Cleveland, OH USA

Fellowship - Drexel University College of Medicine
Philadelphia, PA USA

Residency - University of Maryland Hospital
Internal Medicine
Baltimore, MD USA

Internship - University of Maryland Hospital
Internal Medicine
Baltimore, MD USA

Medical School - University of Maryland Medical Center
Baltimore, MD USA

Undergraduate - University of Michigan
Ann Arbor, MI USA


  • Internal Medicine
  • Internal Medicine - Gastroenterology

Specialty Interests

Endoscopic Hemostasis, Treatment of Barrett's esophagus and early, esophageal cancer, Endoluminal stenting, Therapeutic endoscopy including EUS and ERCP

Research & Publications

Research & Publications

See publications for Sunguk Jang, MD.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 11/27/2018, Dr. Jang has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

100 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
4.8 out of 5
Explains 4.8
Listens 4.9
Courtesy, Respect & Concern 4.9
Knows Medical History 4.7
Time Spent with Patient 4.8
Patient Rating of Doctor 4.8

11 Patient Comments

Reviewed on Oct 15, 2018

Dr. Jang was very professional and kind

Reviewed on Oct 3, 2018

good experience and I liked this doctor very much

Reviewed on Aug 14, 2018

Dr. Jang effectively listens!! Provide a way forward. Excellent Doctor. Cleveland Clinic should be proud to have him on the team!! I am humbly grateful. I have seen a lot of doctors over 20 years, he is one of the best. Thank you

Reviewed on Aug 14, 2018

Wait time in the mornings is difficult due to extensive belching, prolong sitting aggravates the hernia aggravates the belching, standing is difficult due to CRPS in knees, but to see Dr. Jang I will wait for as long as it takes.

Reviewed on Jul 13, 2018

All excellent! DR. jang is awoderful surgeon and a terrific and caring human being.

Reviewed on Jul 10, 2018

not being able to get an appointment in a timely manner. example......after a hospital stay I'm told to see one of my doctors in 7 to 10 days. I'm lucky to get it in 7 to 10 weeks.

Reviewed on Jun 20, 2018

Dr Jang was well informed did his due diligence and had a very engaging personality.

Reviewed on Apr 18, 2018

Dr. Jang was right on time. He is an exceptional gentleman, very professional, &the excellent caliber of physician that Cleveland Clinic is known for through the years.

Reviewed on Feb 27, 2018

after the procedure the doctor didn't come and follow up. I had to find out everything myself.

Reviewed on Jan 12, 2018

Dr. Jang was excellent in his treatment of me & seems to be a capable, caring, compassionate physician. I felt comfortable knowing I was in his care.

Reviewed on Nov 28, 2017

Dr. Jang truly listened to me and answered all my questions. He was optimistic and realistic and inspired me to continue with the successful treatment plan. As a bonus, he has such a great sense of humor as well, which is so appreciated when dealing with very stressful medical concerns. I am so impressed with his technical expertise. He and his competent team work so well together. He completes procedures with great efficiency and effectiveness. I have had multiple GI procedures by Dr. Jang over the years and I am always confident that he will do an excellent job. He always personally checks in with me pre and post procedure to ensure that I am comfortable and doing well. Dr. Jang is an exceptional physician!

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