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John Harmon, MD

Director, Surgical Research
Professor of Surgery

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Appointment Phone


Main Location

Johns Hopkins Bayview Medical Center

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Out-of-State & International Patients +
Out of State Patients

Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

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International Patients

Call +1-410-502-7683 (7a.m. to 6p.m., EST, Mon-Fri)

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  • Director, Surgical Research
  • Professor of Surgery

Centers & Institutes

  • Comprehensive Hernia Center


Breast Cancer, Breast Disease, Burns, Cancer, General Surgery, Hernias, Surgery, Thyroid Disorders, Wound Healing

Research Interests

pathophysiology of gastro-esophageal diseases; Surgical wound healing


John W. Harmon, M.D., FACS, is a general surgeon with a wide-ranging practice including a variety of complex clinical problems, Dr. Harmon specializes in the management of complex hernias and wounds. However, his many surgical interests include hernias, wound healing, breast cancer, colon and small bowel cancers, stomach cancer, as well as thyroid and parathyroid conditions.

Dr. Harmon has been featured in several publications regarding the gastrointestinal organs, including the esophagus, stomach, small intestine and colon. He has also published information dealing with military medicine, specifically blast injuries. Dr. Harmon was one of the first to publish, in his paper on Zollinger Ellison syndrome, the importance of removing tumors. He also was the first to observe an endocrine effect of marijuana. His animal studies of GERD (gastro-esophageal reflux disease) were extensive and helped explain the pathophysiology of the condition.


  • English
  • French

Additional Resources

Additional Resources +
  • Education +


    • Columbia University College of Physicians and Surgeons (New York NY ) (1969)


    • Boston City Hospital / Surgery (Boston MA ) (1975)


    • Lahey Clinic / Gastroenterology (Boston MA ) (1973)
    • Beth Israel Deaconess Medical Center / Surgery (Boston MA ) (1972)


    • Surgery, American Board of Surgery (2005)
  • Research & Publications +
  • Academic Affiliations & Courses +
  • Activities & Honors +
  • Videos & Media +
  • Events +
  • Contact & Locations +


    Johns Hopkins Bayview Medical Center
    4940 Eastern Avenue
    Baltimore, MD 21224
    Appointment Phone: 410-550-0400
    Location Map
    The Johns Hopkins Hospital
    600 N. Wolfe Street
    Sheikh Zayed Tower
    Baltimore, MD 21287
    Appointment Phone: 443-997-1508
    Location Map
    Johns Hopkins Outpatient Center
    601 N. Caroline Street
    Baltimore, MD 21287
    Phone: 410-550-0401
    Appointment Phone: 443-997-1508
    Fax: 410-550-1245
    Location Map


    • Surgery

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