Department Gastroenterology, Hepatology & Nutrition
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 Education - University of Maryland Medical Center
Baltimore, MD USA

Undergraduate - University of Michigan
Ann Arbor, MI USA


  • Internal Medicine

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 11/27/2019, 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

110 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
4.9 out of 5
Explains 4.8
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

20 Patient Comments

Reviewed on Jan 20, 2020

my husband and I both really liked Dr Jang. He was thoughtful, kind and explained everything in way which was easy for us to understand.

Reviewed on Nov 12, 2019

The doc comes in. He shakes your hand. He asks if you know about the risks. You sign the pad. You get the anesthetic. When you come out of it, the doc is gone. This is how the place works.

Reviewed on Nov 11, 2019

Dr Jang listened to my questions and concerns. And took the time to explain how we will manage the pain and nutritional needs related to my chronic Pancreatitis. I have a complex illness and he laid out the next steps in establishing a based line to monitor the function and health of my pancreas. I am grateful for his expertise on this disease and methodical approach in managing or prevention of progression.

Reviewed on Nov 1, 2019

Dr Jung is a excellent doctor and I would recommend him

Reviewed on Oct 31, 2019

Dr. Jang has been my doctor for numerous years and I have much confidence in him.

Reviewed on Oct 3, 2019

Dr. Jang is great. Would definitely recommend him.

Reviewed on Sep 27, 2019

Dr. Jang has been excellent to work with!

Reviewed on Sep 16, 2019

it was very comforting to see concern and care in the eyes of the doctors opposed to $ signs!!! The nurses are AWESOME!!!!!

Reviewed on Aug 20, 2019

The office staff and doctor were excellent - really put me at ease and were so pleasant and friendly. They explained everything thoroughly. The only negative comment I have is that I did not receive my bowel prep instructions and so I had to call for them a few days before the procedure. received them promptly on my chart - and then in the mail a day AFTER the procedure.

Reviewed on Aug 12, 2019

amazing, kind, great doctor all overall. nicest, concerned and caring.

Reviewed on Jul 19, 2019

Doctor was very professional and made me feel at ease. He is a great Doctor and nurses were just as wonderful!! My experience was one of the best I have ever had in a medical facility!

Reviewed on Jul 17, 2019

Dr. Jang always takes the time to listen and explain any questions I have.

Reviewed on Jun 14, 2019

Dr.Jang and his team were thoughtful and very informative to my medical needs.

Reviewed on May 31, 2019

Dr Jang was very thorough. He spoke with me both before and after the procedure.

Reviewed on May 30, 2019

The GI doctor strongly recommended I have the procedure done at the Cleveland Clinic. The soonest we could get an appointment was in 10 days. We live in Wyoming so going back home wasn't a good option. So, we took the time to visit family in Illinois, Indiana and Kentucky. We had a great time visiting family. - Dr Jang was very personable and friendly. I trusted Dr Jang's abilities because the GI doctor had faith in him. I now trust Doctor Jang because I no longer have the pain I had before the procedure. - I really trust the Cleveland Clinic and have scheduled another appointment to see a vascular doctor there. Thank you for helping me!

Reviewed on Apr 16, 2019

Dr Jang was very upbeat about my condition for which I was grateful.

Reviewed on Apr 2, 2019

very accommodating - excellent doctor/patient relationship - he is AWESOME!

Reviewed on Apr 1, 2019

Dr Jang is so caring and compassionate. I'm very fortunate to have him as was my Mother. He extended her life 3 times! He is amazing and Loved!

Reviewed on Apr 1, 2019

Dr Jang is the BEST! I am so thankful to be under his care.

Reviewed on Apr 1, 2019

Dr Jang's nurse is so caring. She felt like a member of my family!

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