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Mark Gregory Lazarev, M.D.

Photo of Dr. Mark Gregory Lazarev, M.D.
  • Associate Professor of Medicine


Celiac Disease, Clinical Gastroenterology, Colitis, Colon Polyps, Crohn's Disease, Diarrhea, Digestive Disorders, Fecal Microbiota Transplantation, Gastroenterology, Inflammatory Bowel Disease (IBD), Proctitis, Ulcerative Colitis more

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The Johns Hopkins Hospital (Main Entrance)

Appointment Phone: 410-933-7495
1800 Orleans St.
Sheikh Zayed Tower
Baltimore, MD 21287 map

Johns Hopkins Medicine - Green Spring Station

Appointment Phone: 410-616-7350
2360 W. Joppa Road
Joppa Concourse
Lutherville, MD 21093 map
Phone: 410-616-7350


Dr. Lazarev joined Johns Hopkins from the Mount Sinai Medical Center in New York, where he completed the Present-Levison advanced inflammatory bowel disease (IBD) fellowship.

A specialist in the diagnosis and management of Crohn's disease and ulcerative colitis, Dr. Lazarev has published numerous peer-reviewed articles, abstracts and chapters. He is board-certified in gastroenterology and internal medicine. more


  • Associate Professor of Medicine

Departments / Divisions

Centers & Institutes



  • MD, University of Pittsburgh School of Medicine (2002)


  • Beth Israel Deaconess Medical Center / Internal Medicine (2005)


  • University of Pittsburgh School of Medicine / Gastroenterology (2008)
  • The Mount Sinai Hospital / Gastroenterology (2009)

Board Certifications

  • American Board of Internal Medicine / Gastroenterology (2008)

Videos & Media

Crohn's Disease | Amanda's Story

Recent News Articles and Media Coverage

Tales from the Crypt, Inside Tract (Summer, 2016) 

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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