Care Philosophy

"Patient first" is the attitude I developed during my residency. My residency training program promoted this philosophy. "Patient first" means you are my priority. I will listen, be compassionate, non-judgmental and anticipate your needs as a patient. My goal is to arrive at the correct diagnosis, start the appropriate treatment and manage your condition while helping you feel comfortable and informed along the way. I encourage open communication to help establish a trusting doctor-patient relationship, so that we can work as a team to improve your health and help you feel better as quickly as possible. My goal is always to deliver the very best healthcare to you and your loved ones.

About Thomas W. Abernathy, Jr., MD

Dr. Thomas Abernathy is a native of the greater Washington, D.C. metropolitan area, growing up in Silver Spring, MD. He graduated with Honors from Morehouse College in Atlanta, GA, where he received a Bachelor of Science in Biology. He continued his studies in Philadelphia at the Medical College of Pennsylvania & Hahnemann University of Medicine (now Drexel University School of Medicine) where he received his medical degree. Dr. Abernathy returned to the Washington, D.C. Metropolitan area and attended the MedStar Washington Hospital Center. Here is where he completed his Internal Medicine Residency Program and soon after, his MedStar Washington Hospital Center / Georgetown University Gastroenterology & Hepatology Fellowship Program. In 2005, he joined Digestive Disorders Associates in Annapolis, MD and in 2008, he embarked on a new opportunity with Digestive Disease Associates (now Gastro Health), who have offices in Catonsville and Columbia.

Dr. Abernathy is interested in all aspects of gastroenterology but has a special interest in constipation, gastroesophageal reflux disease, colon cancer screening and hemorrhoid banding. Dr. Abernathy enjoys participating in health fairs and other community service projects throughout Maryland. Outside of medicine, he enjoys spending time with his family, his friends and attending auto races (Formula 1, IRL, IMSA). He is an avid skier and snowboarder, and may be getting into cycling soon. He attends church and participates in community service projects through his fraternal organization.

Conditions & Procedures

  • Abdominal Pain
  • Acid Reflux & GERD
  • Anal Fissures
  • Anemia
  • Barrett's Esophagus
  • Celiac Disease
  • Cirrhosis
  • Clostridium Difficile (C.Diff)
  • Colitis
  • Colon Cancer Screening
  • Colon Diseases & Polyps
  • Condyloma
  • Constipation
  • Crohn’s & Ulcerative Colitis
  • Diarrhea
  • Diverticulitis
  • Dyspepsia
  • Dysphagia
  • Esophageal Disease
  • Fecal Incontinence
  • Gallbladder Disease
  • Gastritis
  • Gastrointestinal Bleeding
  • Gastroparesis
  • H. Pylori
  • Hemorrhoids
  • Hepatitis
  • Indigestion
  • Inflammatory Bowel Disease
  • Irritable Bowel Syndrome
  • Liver Disease
  • Obesity
  • Pancreatic Disease & Pancreatitis
  • Peptic Ulcer Disease
  • Radiation Proctitis
  • Swallowing Disorders
  • Anoscopy
  • Capsule Endoscopy (Pill Cam)
  • Colonoscopy (Screening & Diagnostic)
  • EGD (Upper Endoscopy)
  • Esophageal Ablation
  • Esophageal Dilation
  • Flexible Sigmoidoscopy
  • Hemorrhoid Treatment & Banding
  • PEG Placement

Office Locations

Primary Location

Picture of the Catonsville Office


700 Geipe Rd.
Suite 230
Catonsville, MD 21228

Phone: 410-247-7500
Fax: 410-247-4227

Additional Locations


10710 Charter Dr.
Suite 110
Columbia, MD 21044

Phone: 410-992-9797
Fax: 410-730-0942


Procedure Locations

Having a procedure? It may not always be in the same location where you consulted with your doctor. Check with your doctor to make sure you’re headed to the right place.



Medical College Of Pennslvania and Hahnamann University


MedStar Washington Hospital


Washington Hospital Center (Washington, DC)


MedStar Washington Hospital

Professional Highlights


Board Certified in Gastroenterology

Professional Memberships

  • American Society of Gastrointestinal Endoscopy
  • American Gastroenterology Association
  • American College of Gastroenterology
  • Maryland State Medical Society
  • National Medical Association