Mark H. Johnston, MD, FACP, FACG, AGAF

A former Navy Medical Officer, Mark Johnston, MD, FACP, FACG, AGAF, has treated Members of Congress and served as Gastroenterologist to the White House. Dr. Johnston is a noted medical inventor, having patented a device to treat Barrett's Esophagus and early esophageal cancer.

Dr. Johnston is board certified in Internal Medicine and Gastroenterology and earned his medical degree at Hahnemann University. He completed his residency and GI fellowship at the National Naval Medical Center. He was nominated "Physician of the Year" by Central Penn Parent Magazine's Heathcare Heroes Award Program in 2010. For an extended biography of Dr. Johnston, click here. Click below to read Dr. Johnston's feature articles.

To read the July 25, 2007, Lancaster Intelligencer-Journal article "Device Prevents Cancer" about Dr. Johnston's Cryoablation technology in the fight against esophageal cancer, click here.

To listen to a 2008 audio interview with Dr. Johnston discussing his work on CryoAblation Therapy , please click here. The interview was conducted by The Journal of Lancaster General Hospital.

To watch Dr. Johnston's 2010 television interview with CBS News promoting colon cancer awareness, please click here.

Dr. Johnston's August 2010 Cryotherapy article in the Navy Journal is available here.