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Gastroenterology and Hepatology Services in Columbia, Md

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New Outpatient GI Center — Now Open!

A full range of gastroenterology and hepatology services is available from our GI experts at Johns Hopkins Medicine, without a trip to the hospital. This brand new outpatient center is an all-in-one clinic, endoscopy center and surgery center offering screening, diagnosis and treatment for a wide range of GI disorders.

Convenient Howard County Location

We’re located right off Route 29 and Route 175, close to the Columbia Town Center. Enjoy free parking and easy access to the GI services you need — all in the same building, on the same floor.

building at knoll north drive

Johns Hopkins Gastroenterology and Hepatology
5450 Knoll North Drive
Columbia, MD 21045

Endoscopy & Surgery Center — Suite 301
443-933-0286

GI Clinic — Suite 390
410-933-7495

Get directions

Visit our Baltimore County location (Green Spring Station)

Appointments When You Need Them

Getting an appointment that works with your schedule (and your fasting requirements) is simple. We have both morning and afternoon appointments available on most days, and we can even arrange immediate appointments when necessary.

Comprehensive GI Services

Colon Cancer Screening Clinic

We offer colonoscopies and other tests and procedures to detect colon cancer and rectal cancer, as well as polyps and lesions that could eventually become cancerous. Learn more.

For Referring Physicians: Expedite patient diagnosis with our direct access endoscopy program.

Schedule diagnostic tests in the same location as your doctor’s office. We offer a variety of routine and specialty tests, including:

knoll infusion center

GI Treatment Centers and Programs

Have you been diagnosed with a GI disorder? Our specialty centers and programs provide comprehensive care for a range of diseases and conditions.

Expert Care by Johns Hopkins Physicians and Nurses

Patients at our Columbia center have access to the experience and expertise of Johns Hopkins physicians and nurses. The center is led by clinical director Ekta Gupta, M.D.

Meet Our Providers

Photo of Dr. Tsion Abdi, M.D., M.P.H.

Abdi, Tsion, M.D., M.P.H.

Assistant Professor of Medicine
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Achalasia, Clinical Gastroenterology, Colon Polyps, Colonoscopy, Constipation, Diarrhea, Digestive Disorders, Diverticulosis, Eosinophilic Esophagitis, Gastroesophageal Reflux Disease (GERD), Heartburn, Irritable Bowel Syndrome, Motility Disorders, Women's Health
 
Photo of Dr. Saleh Ali Alqahtani, M.B.Ch.B.

Alqahtani, Saleh Ali, M.B.Ch.B.

Assistant Professor of Medicine
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Cirrhosis, Colon Polyps, Colonoscopy, Digestive Disorders, Endoscopy, Fatty Liver, Gastroenterology, Gastroesophageal Reflux Disease (GERD), Gastrointestinal Bleeding, Hepatitis B (HBV), Hepatitis C (HCV), Indigestion, Liver Cancer, Liver Fibrosis, Liver Transplant, Pancreatic and Biliary Disease
 
Photo of Dr. Dilhana Sumaiya Badurdeen, M.B.B.S.

Badurdeen, Dilhana Sumaiya, M.B.B.S.

Assistant Professor of Medicine
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Colon Cancer, Colonoscopy, Gastroesophageal Reflux Disease (GERD), Obesity, Weight Loss
 
Photo of Dr. Marcia Irene Canto, M.D.

Canto, Marcia Irene, M.D.

Professor of Medicine
Professor of Oncology
Director of Clinical Research, Division of Gastroenterology
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Barrett's Esophagus, Digestive Disorders, Endoscopic Ultrasound, Endoscopy, Esophageal Cancer, Family History of Cancer, Gastroenterology, Gastroesophageal Reflux Disease (GERD), Gastrointestinal Cancers, Pancreatic and Biliary Disease, Pancreatic Cancer, Pancreatic Cysts
 
Photo of Dr. Reezwana Chowdhury, M.D.

Chowdhury, Reezwana, M.D.

Assistant Professor of Medicine
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Barrett's Esophagus, Colorectal Cancer Screening, Crohn's Disease, Esophageal Diseases, Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome, Ulcerative Colitis
 
Photo of Dr. Ekta Gupta, M.B.B.S., M.D.

Gupta, Ekta, M.B.B.S., M.D.

Assistant Professor of Medicine
Clinical Director, Johns Hopkins Knoll North Gastroenterology and Hepatology in Howard County
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Abdominal Pain, Celiac Disease, Constipation, Gastroenterology, Gastrointestinal Diseases, Inflammatory Bowel Disease (IBD), Liver Disease, Nausea, Small Bowel Disease
 
Photo of Dr. Amy Kyungmee Kim, M.D.

Kim, Amy Kyungmee, M.D.

Assistant Professor of Medicine
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Chronic Viral Hepatitis, Cirrhosis, Fatty Liver, Gastroenterology, Liver Disease, Liver Test Abnormalities, Liver Transplant
 
Photo of Dr. Zhiping Li, M.D.

Li, Zhiping, M.D.

Associate Professor of Medicine
Director of Hepatology
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Bile Duct Injury, Biliary Disease, Elevated Liver Tests, Fatty Liver, Gallstones, Gastroenterology, Hepatitis, Hepatology, Jaundice, Liver Biopsies, Liver Cancer, Liver Disease, Liver Mass, Liver Test Abnormalities, Liver Transplant, Nonalcoholic Fatty Liver Disease, Sclerosing Cholangitis, Therapeutic Endoscopy
 
Photo of Dr. Florin Marian Selaru, M.D.

Selaru, Florin Marian, M.D.

Associate Professor of Medicine
Associate Professor of Oncology
Director, Meyerhoff Inflammatory Bowel Disease Center
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Cholangiocarcinoma, Clinical Gastroenterology, Colitis, Crohn's Disease, Diarrhea, Digestive Disorders, Gastroenterology, Inflammatory Bowel Disease (IBD), Proctitis, Sclerosing Cholangitis, Ulcerative Colitis
 
Photo of Dr. Tinsay Ambachew Woreta, M.D., M.P.H.

Woreta, Tinsay Ambachew, M.D., M.P.H.

Assistant Professor of Medicine
Appointment Phone: 410-933-7495
Expertise, Disease and Conditions: Acute or Chronic Viral Hepatitis, Cirrhosis, Gastroenterology, Hepatology, Liver Disease, Liver Transplant Evaluation, Nonalcoholic Fatty Liver Disease
 
Jacqueline Darmody, ANP-BC

Jacqueline Darmody, ANP-BC

Title: Certified Nurse Practitioner