> > > > Dr. Thomas Johnson, MD
Dr. Thomas Dale Johnson MD is a male Internist, has 26 years of experience and practices in Internal Medicine and Gastroenterology.
Dr. Thomas Johnson has 1 office location.
McFarland Clinic Pc
1215 Duff Ave
Ames, IA 50010

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Locations and availability (1)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

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Specialties & Research

Dr. Thomas Johnson, MD is board certified in Internal Medicine and Gastroenterology.

Education & Awards

Dr. Johnson graduated from University of Illinois at Chicago.


Dr. Johnson has 6 hospital affiliations:

  • Mary Greeley Medical Center 
  • White Memorial Med Ctr 

Accepted Insurance Plans

Dr. Johnson accepts these health insurances in at least one office:

  • United Healthcare - 16 plans
  • Great-West Healthcare - 2 plans
  • Wellmark Blue Cross Blue Shield - 6 plans
  • Humana - 9 plans
  • Cigna - 3 plans
  • Iowa Medicaid - 1 plan
  • Aetna - 1 plan


  • Persian

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Additional Information
Where does Dr. Thomas D. Johnson practice?
Dr. Thomas Johnson practices Internal Medicine and Gastroenterology near Ames, IA.
See Ames Internists and Ames Gastroenterologists.