Dr. Gregory Shannon, MD
New Patients

Dr. Gregory Shannon, MD


Gastroenterology | Male

17510 W Grand Pkwy S Ste 220 Sugar Land, TX 77479 Get Directions


Dr. Gregory Shannon, MD is a gastroenterology doctor who practices in Sugar Land, TX. He is 47 years old and has been practicing for 21 years. Dr. Shannon is affiliated with Memorial Hermann Sugar Land Hospital, St. Luke's Sugar Land Hospital, Houston Methodist Sugar Land Hospital and Memorial Hermann - Texas Medical Center.

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Dr. Shannon's Experience

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Board Certifications

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Conditions Treated

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Background Check

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Memberships & Professional Affiliations

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Visiting Dr. Shannon

Dr. Shannon accepts 22 insurance carriers

Affiliated Hospitals

Hospital Quality
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Dr. Shannon's Reviews

Likelihood of recommending Dr. Shannon to family and friends
based on 34 total surveys (7 with reviews)
Dr. Shannon's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    10 to 15 minutes
Patient Reviews (7)
Sugar Land, TX |
I'm a physician and a patient of Dr. Shannon. I can confidently say he is a well trained, highly skilled, and very personable doctor. We as patients are lucky to have such a professional for our care. I unequivocally recommend Dr. Shannon!
in Richmond, TX |
I scheduled an appointment with Dr. Shannon to have an EGD procedure performed for an upcoming surgery with another surgeon. However, when I arrived for my appointment I was told that I had been given the wrong time and date, Dr. Shannon was in surgery. Therefore, I was asked and given a time to return later that day, when his surgery clinic had ended. When I returned, I waited over 30 minutes before I was called into an exam room. Once I finally was put into an exam room, his nurse had updated
in Missouri City, TX |
Outstanding Doctor! He makes you feel very comfortable and knowledgeable. He doesn't make you feel like you are being rushed and he answers your questions thoroughly. His bedside matters are excellent, he explains his procedures and his findings. I didn't feel like a doctor payment but like an actual patient. His staff was also polite and helpful.
in Stafford, TX |
Front desk is rude and very unprofessional
in Sugar Land, TX. |
From the moment we walked into Dr. Shannon's I was impressed. The staff was very caring. Dr. Shannon himself was great. Asked questions and listened to my sons answers. We walked out of his office feeling very at ease.
in Houston, TX |
This doc was awesome! Handled my situation with great care and concern! My wife was equally satisfied with his care and bedside manner. A really terrific doctor! I recommend him highly!!!!
in Wharton, TX |
Scheduling nightmare.Started in Dec.2015 saw him Jan13th 2016 Dr. Shannon ordered colonoscopy before even seeing me. Haven't even talked to him yet about the problem I was having. I saw Dr. Shannon for every bit of three minutes. No exam just told me that I was close to 50 and he could give me a colonoscopy to see what was going on.Gave me meds for something he has no idea could be the problem. Colonoscopy set for Feb.2nd. insurance problems with OakBend had to reset for March 3rd. Not happening
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Dr. Shannon's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Gastroenterology
  •  Board certified in Gastroenterology
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Shannon has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for Texas.

    What is medical malpractice
  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions

Board Certifications

Why It Matters: Dr. Shannon's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Gastroenterology

Conditions Treated

  • Abdominal Disorders
  • Abdominal Pain
  • Anemia
  • Autoimmune Diseases
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Benign Tumor
  • Biliary Atresia
  • Blood Disorders
  • Cancer
  • Cholecystitis and Gallstones
  • Colorectal Cancer
  • Constipation
  • Crohn's Disease
  • Dehydration
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Ulcer
  • Duodenitis
  • Dysentery
  • Dysphagia
  • Esophageal Diseases
  • Esophageal Varices
  • Esophagitis
  • Gallstones
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Diseases
  • Gastrointestinal Malabsorption
  • Heartburn
  • Hemorrhoids
  • Hepatitis B - Immune Response
  • Hepatitis C
  • Hernia
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Malnutrition
  • Nausea
  • Non-Alcoholic Fatty Liver Disease
  • Non-Neonatal Jaundice
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Peptic Ulcer
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Stomach Cancer
  • Stomach Diseases
  • Stomach and Small Intestine Cancer
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Vascular Insufficiency of Intestines
  • Viral Hepatitis
  • Vomiting Disorders


  • Medical School
    Northwestern University The Feinberg School Of Medicine

    Graduated in 1996

  • Internship Hospital
    Baylor University

    Completed in 1997

  • Residency Hospital
    Baylor University

    Completed in 1999

  • Fellowship Hospital
    Baylor University

    Completed in 2002

  • Undergraduate School
    Xavier University Of Louisiana

    Graduated in 1992

Languages Spoken

  • English
  • Spanish

Memberships &
Professional Affiliations

Dr. Shannon does not have any memberships or affiliations listed. If you are Dr. Shannon and would like to add memberships or affiliations, please update your free profile.


  • Gastroenterology

Procedures Performed

  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Gastroenterology Procedures
  • Liver Biopsy