Patient Reviews

Reviews reflect patients' level of satisfaction with the care they received from this provider. Dr. Mark Johnston xhas an overall rating of 4.9.

About

Dr. Mark Johnston, MD is a Doctor primarily located in Lancaster, PA. He has 32 years of experience. His specialties include Gastroenterology and Internal Medicine. Dr. Johnston is affiliated with Lancaster General Hospital. He speaks English.

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Locations & Directions

Lancaster Gastroenterology Inc

2112 Harrisburg Pike
Lancaster, PA 17601

Specialties & Expertise

Dr. Mark Johnston has the following 15 areas of expertise and 2 specialties:

  • Gastroenterology

    Specialty

  • Internal Medicine

    Specialty

  • Abdominal Pain

    Expertise

  • Acid Reflux Disease (GERD)

    Expertise

  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)

    Expertise

  • Barrett Esophagus

    Expertise

  • Celiac Disease

    Expertise

  • Colon Cancer

    Expertise

  • Colonoscopy

    Expertise

  • Constipation

    Expertise

  • Esophagoscopy

    Expertise

  • Hemorrhoids

    Expertise

  • Hepatitis

    Expertise

  • Hepatitis C

    Expertise

  • Irritable Bowel Syndrome (IBS)

    Expertise

  • Ulcerative Colitis

    Expertise

  • Viral Human Hepatitis

    Expertise

  • Languages

    • English

School

Drexel University College Of Medicine, 1985