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John W. Harmon, M.D.


John W. Harmon, M.D.

Professor of Surgery

John W. Harmon, M.D., FACS, professor of surgery at The Johns Hopkins University School of Medicine and director of surgical research at the Johns Hopkins Bayview Medical Center, earned a medical degree at the Columbia University College of Physicians and Surgeons in New York and received surgical training at the Harvard University Medical School.

Dr John Harmon is a senior surgeon with extensive experience dealing with a wide variety of surgical problems. Prior to being appointed Professor of Surgery at Johns Hopkins he was an Army surgeon stationed at Walter Reed, and then Chief of Surgery at the Washington VA Medical Center. His current practice is focused on complex hernia, breast cancer, and surgical conditions of the thyroid and parathyroid.

A general surgeon with a wide-ranging practice including a variety of complex clinical problems, Harmon specializes in the management of complex hernias and wounds. However, his many surgical interests include:

Surgical Interests:

  • Hernias
    • Management of primary and recurrent inquinal and abdominal hernias
    • Mesh repairs
    • Component separation technique to allow repair with native tissues
    • Individualized selection of surgical procedure: open or laparoscopic
    • Use of bio-artificial mesh
  • Wound Healing
    • Working with the staff of the Wound Healing Center at Johns Hopkins Bayview, Dr. Harmon manages care of poorly healing wounds of all types. He directs clinical trials of new treatment modalities for wound healing
  • Breast
    • Multimodality treatment for breast cancer
    • Individualized surgical treatment for breast cancer
    • Reconstructive surgery
    • Access to Johns Hopkins University clinical trials
  • Colon and Small Bowel
    • Resections without colostomy for cancer, diverticulitis or inflammatory bowel disease
    • Management of the difficult colostomy:
      • Prolapse
      • Hernia
      • Take down and reconnect
  • Stomach
    • Treatment of cancers with multimodality program
  • Thyroid
    • Management of a thyroid nodule
    • Management of thyroid cancer
    • Surgery for hyperthyroidism
  • Parathyroid
    • Surgical management of primary, secondary and tertiary hyperparathyroidism
    • Preoperative localization with Sestamibi Scans and Ultrasound
    • Minimally Invasive parathyroid surgery
    • Real time assay of parathyroid hormone to track surgical results

Surgical Research

Dr. Harmon's recent work focuses on using growth factors and techniques of molecular biology to accelerate and improve the quality of wound healing in a variety of tissues.

Dr. Harmon has research interests in the pathophysiology of gastroesophageal diseases. He has publications related to the gastrointestinal organs including the esophagus, stomach, small intestine, and colon. His publications also deal with topics in military medicine especially blast injury. His paper on Zollinger Ellison Syndrome was one of the first to show the importance of removing the tumours and he was the first to observe an endocrine effect of marijuana. His animal studies of GERD (gastro esophageal reflux disease) are extensive and help explain the pathophysiology of this condition.

Dr. Harmon's Surgical Research Laboratory has been a fertile training ground for young investigators. Prospective candidates should email their CV's and a letter of inquiry to Dr. Harmon, ( 
Contact Information:
Johns Hopkins Bayview Medical Center
Department of Surgery
4940 Eastern Avenue
Baltimore, Maryland 21224
Phone: (410) 550-0400 or (410) 550-0401
Fax: (410) 550-1245


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