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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
  • 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
  • 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 11/26/2021, 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

99 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
4.6 out of 5
Explains 4.6
Courtesy, Respect & Concern 4.7
Patient Rating of Doctor 4.6

19 Patient Comments

Reviewed on Oct 19, 2021

Excellent care by Dr Jang and staff

Reviewed on Aug 30, 2021

Dr. Jang was good.

Reviewed on Aug 20, 2021

My experience with the doctors/medical staff, outside of my nurse, was a mess. None of them came to talk to me and answer my questions. They though I was just have an endoscopy done and had to be corrected by the nurse and go setup for my proper procedure. The main surgeon barely talked to me for two seconds in the OR and afterwards I only saw him when he looked at the stomach MRI and said "looks like we did it right". There was no care from the main surgeon or resident(? I assume that was his position). My anesthesiologist seemed perfectly nice. And once again my nurse was great. But otherwise - a mess that made me incredibly more anxious pre-procedure

Reviewed on Aug 17, 2021

Everybody was amazing. Love Doctor Jang. Amazing doctor.

Reviewed on Aug 13, 2021

Dr. Jang is great!

Reviewed on Aug 11, 2021

Great doctor. Very impressed with him

Reviewed on Aug 6, 2021

Everyone at Dr. Jane's office is very nice.

Reviewed on Aug 6, 2021

Dr. Jang is a wonderful and caring physician. He always takes time to go over possible issues and procedures. He listens to my description of how I am feeling and pays attention to my concerns.

Reviewed on Aug 6, 2021

I always recommend Dr. Jang to others.

Reviewed on Aug 2, 2021

Great doctor. Four month wait with severe pain

Reviewed on Jun 7, 2021

Dr Jang and I have been through this process multiple times. We are well acquainted with each other and the process.

Reviewed on Mar 15, 2021

Dr Jang is very attentive. He listens and asks questions. I appreciate his professionalism. I would reccomend him to any one looking for his field.

Reviewed on Mar 15, 2021

Dr Jang is professional, and asked all the right questions. I reccommend him to anyone who needs his field.

Reviewed on Feb 19, 2021

very great doctor and staff

Reviewed on Jan 22, 2021

Dr Jang was very nice and willing to answer all our questions to make us more comfortableHe's a wonderful surgeon.

Reviewed on Dec 18, 2020

Loved Dr. Jang! Great that he took time to "sit down" and talk with us!

Reviewed on Dec 14, 2020

Dr Jiang is incredibly knowledgeable and kind. I am so grateful that he is my provider.

Reviewed on Dec 1, 2020

You felt like the doctor cared. NOT whose up next. I came out of this procedure feeling confident I was fine. I went in worried.

Reviewed on Nov 19, 2020

my doctor was excellent; he actually talked to me before the procedure and he listened to me.

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