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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
  • Gallbladder Cancer
  • Gallbladder Disease
  • Gallstones
  • Gastritis
  • Gastroenteritis
  • Gastroesophageal Reflux (GERD)
  • Pancreatic Cancer
  • Pancreatic Disease
  • Pancreatitis
  • Primary Sclerosing Cholangitis
  • Rectal Bleeding
View all 16 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

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

Undergraduate - University of Michigan
Ann Arbor, MI USA


  • 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 8/29/2023, 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

109 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
Courtesy, Respect & Concern 4.8
Patient Rating of Doctor 4.8

12 Patient Comments

Reviewed on Jul 25, 2023

Dr Jang took great care in explaining the procedure. He was calming and kind.

Reviewed on Jul 11, 2023

Dr. Jang is a fantastic doctor who truly cares, listens and very knowledgeable about treatment and options. His staff also is top notch. I would highly recommend him to others.

Reviewed on Jun 19, 2023

Dr. Jang was very friendly, caring and empathetic.

Reviewed on Apr 3, 2023

Doctor has a very good personality and made me very comfortable.

Reviewed on Feb 27, 2023

Couldn't see Dr. Jang but that was okay. Discussed health issues & made appt

Reviewed on Jan 24, 2023

Dr Jang is fantastic. He has conducted many of my GI procedures over the past 7 years. Knowing that he is the physician conducting and managing the procedure and it eases my anxiety quite a bit. His team are always great and clearly respect him as well. He's caring and always ensures that I'm ready and eases my stress explaining the procedure and timelines. Despite the risks involved, he has conducted previous procedures which were very risky (ercp, biliary stents, etc) with ease and no issues. I'm forever grateful for Dr Jangs professionalism, care, concern, intricate skills, positive attitude. He is the reason I've stayed with Cleveland clinic for so many years.

Reviewed on Jan 24, 2023

Dr Jang's Q3 team have gotten me through numerous procedures and have always worked well together, and I've always felt cared for.

Reviewed on Dec 12, 2022

Dr. Jang is a wonderful, knowledgeable, physician who truly cares about you. He takes the time to answer all your questions and gives you options for your treatment, if applicable, and schedules follow-ups to make sure everything is going well. He's excellent!!!

Reviewed on Dec 12, 2022

Top notch service from Dr. Jang and his staff....always!

Reviewed on Dec 8, 2022

Dr. Jang took time to explain the procedure, as did the anesthesiologist. Both checked on me after the procedure and provided info re procedure, restart of Eliquis and time for Surgical Path report. All good.

Reviewed on Oct 31, 2022

Dr. Jung's nurse was amazing and very helpful in the process.

Reviewed on Oct 31, 2022

Dr. Jang is the epitome of what a physician should be...knowledgeable, caring, attentive, a good listener, responsive to concerns, and reassuring. His personality is engaging and enjoyable. I have always had a good experience. Whether my visit is a procedure, an in-person office visit, or a virtual call, I am confident I am receiving top-notch medical care from this provider. This visit was no exception.

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