Gregory Brennan, M.D.


647 N. Miller Rd

Mansfield, TX 76063

Closed. Opens Thur at 8:30AM
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Quick Facts

  • Virtual Telemedicine Visits Available, Call For Details
  • Board Certified Gastroenterologist
  • Currently Accepting New Patients
  • Most Insurance Plans Accepted
  • Performs Colonoscopies

GI Alliance - Mansfield, TX - N. Miller Rd

Gastroenterology in Mansfield, TX

GI Alliance - Mansfield, TX - N. Miller Rd

647 N. Miller Rd

Mansfield, TX 76063

Closed. Opens Thur at 8:30AM


GI Alliance - Mansfield Endoscopy Center - N. Miller Rd

Gastroenterology in Mansfield, TX

GI Alliance - Mansfield Endoscopy Center - N. Miller Rd

647 Miller Road

Ste. 100

Mansfield, TX 76063

Closed. Opens Thur at 8:30AM

About Gregory Brennan, M.D.

Why did you choose to specialize in Gastroenterology?

I choose to specialize in gastroenterology because of the ability to make a real difference in patients lives. The field is advancing rapidly and being able to offer new technology and treatments improves the care for our patients. Building strong relationships with patients and their families is the best part of the field.

Do you have a specialty of interest within GI?

I specialize in all aspects of general gastroenterology and hepatology as well as endoscopy. I have received additional training during my fellowship in the management of inflammatory bowel disease (IBD) and endoscopic resection of large polyps such as endoscopic mucosal resection (EMR).

Some areas of interest I treat include:
Ulcerative colitis, Crohn’s Disease
Colon cancer prevention and screening with colonoscopy
Acid reflux or GERD
Diseases of the liver
Irritable bowel syndrome
Gastrointestinal bleeding and anemia

Where did you study?

Undergraduate School: University of Massachusetts Amherst

Medical School: Tufts University School of Medicine

Residency: University of Texas Southwestern & Parkland

Fellowship: University of California Irvine

What certifications do you hold?

Board Certified in Internal Medicine.

What do you and your family enjoy doing in your spare time?

I enjoy spending time with my family and friends. I enjoy reading and sports.

Awards and Accreditation:

Dr. Brennan was featured as one of “19 fellows to know” on the AGA website ( in 2018 for commitment to advancing GI and patient care through quality improvement projects presented at DDW 2018.

He has published several peer-reviewed papers (on IBD, biliary and pancreatic disorders) in various GI journals including: ACG Case Reports Journal, Cleveland Clinic Journal of Medicine, European Journal of Gastroenterology and Hepatology, Journal of Clinical Gastroenterology, and the journal of the Pancreas.



The staff from start to finish was top notch. He was thorough and explained and made sure I had no questions.

B.H. Google

I appreciate Dr. Hodges' professionalism and his care, concern and attention to details regarding my health. His bedside manner is superb. Thank you for this opportunity to share my thoughts on Dr. Gregory Hodges.

C.S. Google

Dr Brennan and his staff are wonderful and Aniah is such a caring and professional nurse. She brings a smile to our faces every time we see her. She was also very helpful to my Dad the patient. Thanks again.

C.S. Google

Thank you for listening to my needs, as well as remembering me. You were a0ble to supply me needs. Hopefully my blood work is not to bad.

J.L. Google

Great staff. All very friendly and go out of their way to make sure you're comfortable. They explain everything clearly and are happy to answer any questions.

S.1. Google


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