McFarland Clinic

Thomas Johnson, MD

Accepting New Patients


4.82 out of 5
  • 76 Patient Ratings

Primary Clinic

1215 Duff Avenue Office

1215 Duff Ave
Ames, IA 50010

Location Details on 1215 Duff Avenue Office

Patient Testimonials


Medical Interests

  • Colon cancer research and prevention
  • Biliary and pancreatic disorders

Joined McFarland Clinic

July 1989

Education & Professional Certification


  • Diplomate, National Board of Internal Medicine
  • Diplomate, National Board of Medical Examiners
  • Diplomate, American Board of Gastroenterology


University of Illinois, Champaign-Urbana, IL

  • BS, 1972-1976

University of Health Sciences, North Chicago, IL

  • BS, 1977-1979

University of Illinois, Chicago, IL

  • MD, 1980-1984


Loyola University Medical Center, Chicago, IL

  • Internal Medicine, 1985-1987


Loyola University Medical Center, Chicago, IL

  • Gastroenterology, 1987-1989

Professional Societies

  • American College of Gastroenterology
  • American Medical Association
  • Associate-American College of Physicians
  • Iowa Medical Foundation
  • Iowa Medical Society
  • Story County Medical Society

Professional & Personal Interests

Leadership Roles

  • Director, Mary Greeley Medical Center Endoscopy Lab
  • Department Chair, McFarland Clinic Gastroenterology
  • Member, McFarland Clinic Nominating Committee

Community Involvement

Ames Emergency Shelter Residence Project, Upward Sports for Children

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