About Dr. Gregory L Shannon MD

Dr. Gregory L Shannon, MD is a Doctor primarily located in Sugar Land, TX. He has 23 years of experience. His specialties include Gastroenterology. He speaks English.

Dr. Shannon has received 3 awards.

Rating Overview

46 Ratings with 23 Comments

The overall average patient rating of Dr. Gregory L Shannon is Great. Dr. Gregory L Shannon has been rated by 46 patients. From those 46 patients 23 of those left a comment along with their rating. The overall rating for Dr. Gregory L Shannon is 3.7 of 5.0 stars.


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


Dr. Gregory L Shannon has the following 1 specialty

  • Specialty Expertise

    Dr. Gregory L Shannon has the following 13 expertise

  • Pancreatic Diseases
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Colon Cancer
  • Colonoscopy
  • Constipation
  • Abdominal Pain
  • Hemorrhoids
  • Gallbladder Diseases
  • Crohn's Disease
  • Celiac Disease
  • Acid Reflux Disease (GERD)
  • Ulcerative Colitis
  • Irritable Bowel Syndrome (IBS)


Showing 5 of 23

Caring doctor

Dr. Shannon was very concerned about my health concerns & worked me into his schedule sooner that he had available because he wanted to accommodate me before I traveled. Would recommend him to any family & friends. He’s an all around excellent doctor! Thanks for everything Dr. Shannon I appreciate you!

Full Review Rating Breakdown

Excellent Physician!

This doctor is Fantastic!!! Look no further. My consultation with him went extremely well and the procedure he performed went exceedingly well. I love Dr. Shannon

Easy Appointment
Friendly Staff
Accurate Diagnosis
Bedside Manner
Spends Time with Me
Appropriate Follow-up
Full Review Rating Breakdown


I made an appointment several weeks in advance. I was told it had to be a Tuesday or Thursday as that is the days he is in that office. I obtained all my medical records and signed in. I was required to pay $150.00 up front. Upon being taken to exam room on time, the nurse? Took my surgical history. My wife was with me and she is an RN. She had to spell all the procedures for the nurse or medical assistant. She then informed us I would be seeing a nurse practitioner. I have an extensive GI history so we opted out and will be seeing an MD.

Full Review Rating Breakdown

over ONE HOUR WATEwait

appointment for 2p.m. 30 mln ask how muck longer ---ans. not much . 3p.m. how much longer? ans. not much L was in too much pain to stay LOOKING for gastroe. dr. HELP ln Missouri city &stafford Tx .

Wait time
60 minutes
Easy Appointment
Friendly Staff
Accurate Diagnosis
Bedside Manner
Spends Time with Me
Appropriate Follow-up
Full Review Rating Breakdown

Worse Visit EVER!!

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 my history etc. I received a date and time for my EDG procedure, and was told by his nurse that I didn’t need to see Dr. Shannon and could leave. I explained to her that I had no knowledge of the how to prepare for the EDG procedure etc. So, I would like to speak with Dr. Shannon (Plus, they had taken my $50.00 co-pay). Once, Dr. Greggory, entered my room, he didn’t bother to say hello, how are you? etc. He did say “Okay, we got you all fixed up. Your scheduled for the EDG procedure. I’ll see you then. I’ve got to get back to the patients that have appointments.” At this point, I reached out to shake his hand and said “Hello, it’s good to see you, as well.” He hesitated, then reached to shake my hand, then said “Okay! Great!! I’ll see you in a couple of weeks, my nurse got you ready to go!” Even though, I was shocked, I turned gabbed my things and walked out of the room thinking, Wow!! He didn’t bother to ask whether I understood the reason for procedure etc. I immediately went to the front desk and requested a form to transfer my records. The Hispanic lady that had previously called to confirm my appointment the day before, asked me to wait. Once she returned she asked whether I would like to speak with the office manager. I said “I’m too upset to speak with anyone!! I just want a copy of the form or you can fax it to my home. I never got the form. However, his office manager called me before I reached the parking lot and asked “What can I could do to the fix things? Or whether I would like to speak with Dr. Shannon regarding the mix-up.” I said “YES!” I would very much like to discuss with Dr. Shannon what occurred today.” I never received a return phone call.

Wait time
35 minutes
Easy Appointment
Friendly Staff
Accurate Diagnosis
Bedside Manner
Spends Time with Me
Appropriate Follow-up
Full Review Rating Breakdown
  • Awards

    3 Awards

  • Patients' Choice Award

    Patients' Choice Award (2010)

    Patients' Choice recognition reflects the difference a particular physician has made in the lives of his/her patients. The honor is bestowed to physicians who have received near perfect scores, as voted by patients.

  • Top 10 Doctor - City

    Top 10 Doctor - City (2014)

    Top 10 Doctors are chosen by the millions of patients who visit Vitals each year to find a new doctor and share their experiences by providing ratings and reviews. In order to differentiate highly-regarded doctors from the rest for patients in search of quality care, Vitals awards Top 10 Doctor honors to those physicians within a certain specialty and geographic area who are consistently given top ratings by their patients.

  • Compassionate Doctor Recognition

    Compassionate Doctor Recognition (2013, 2016, 2012, 2010, 2015)

    Compassionate Doctor certification is granted to physicians who treat their patients with the utmost kindness. The honor is granted based on a physician's overall and bedside manner scores.

  • Education

    23 Years Experience

  • Northwestern University The Feinberg School Of Medicine

    Graduated in 1996

  • Dr. Gregory L Shannon Accepts the Following Insurance

  • Aetna
    • Aetna Choice POS II
    • Aetna HMO
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
  • BCBS Blue Card
    • BCBS Blue Card PPO
  • BCBS Texas
    • BCBS TX Blue Advantage HMO
    • BCBS TX BlueChoice
    • BCBS TX HMO Blue Texas
  • Cigna
    • CIGNA LocalPlus
    • CIGNA Open Access Plus
  • Humana
    • Humana Choice POS
    • Humana ChoiceCare Network PPO
    • Humana HMO
    • Humana HMO Premier
    • Humana Houston HMOx
    • Humana National HMO
    • Humana National POS
  • Multiplan
    • Multiplan PPO
    • PHCS PPO
  • United Healthcare
    • UHC Choice Plus POS
    • UHC Navigate HMO
    • UHC Navigate POS
    • UHC Options PPO

Locations & Directions

  • Similiar Doctors

    Dr. Gregory L Shannon is similar to the following 4 Doctors near Sugar Land, TX.

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