647 N. Miller Rd
Mansfield, TX 76063
HoursOpen today 8:30AM - 4:30PM
- Virtual Telemedicine Visits Available, Call For Details
- Board Certified Gastroenterologist
- Currently Accepting New Patients
- Most Insurance Plans Accepted
- Performs Colonoscopies
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 (Gastro.org) 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.
- Abdominal Pain
- Anal/Rectal Bleeding
- Blood in the Stool
- Bowel Incontinence
- Difficulty Swallowing
- Unexplained Weight Gain/Loss
- Yellowing of the Skin/Eyes
- Acid Reflux
- Anal Fissure
- Anemia/Iron Deficiency
- Barrett's Esophagus
- Biliary Obstruction
- Celiac Disease
- C. Difficile Colitis
- Colon Cancer
- Colorectal Polyps
- Crohn's Disease
- Cyclic Vomiting Syndrome (CVS)
- Eosinophilic Esophagitis
- Esophageal Motility Disorder
- Fatty Liver Disease
- Food Intolerance
- Gallbladder Disease
- Helicobacter Pylori
- Hiatal Hernia
- Impacted Bowel
- Inflammatory Bowel Disease
- Irritable Bowel Syndrome
- Lactose Intolerance
- Non-alcoholic Steatohepatitis
- Peptic Ulcers
- Primary Biliary Cholangitis
- Primary Sclerosing Cholangitis
- Ulcerative Colitis
- Liver Cirrhosis
- Anorectal Manometry
- Argon Laser Therapy
- Capsule Endoscopy
- Colon Cancer Screening
- Endoscopic Mucosal Resection
- Esophageal Dilation
- Esophageal Manometry
- Feeding Tube Insertion (PEG)
- Flexible Sigmoidoscopy
- Hemorrhoid Banding
- Infusion Therapy (IV Infusion)
Dr. Brennan and staff is very professional and love the atmosphere. Dr. Brennan is very detailed and understanding.
Great atmosphere for what normally is a not so comfortable procedure. Dr Brennan and his team provide Five Star service!
The staff was excellent, took great care of me from the time I came in the door, thank you all so much
Wonderful service 👏