Skip to main content
Mark Johnson, MD, Internal Medicine, Mason City, IA, MercyOne North Iowa Medical Center

MarkCJohnsonMD

Internal Medicine Mason City, IA

Hospice & Palliative Medicine, Hospital Medicine/Hospitalist

Physician

Dr. Johnson is on Doximity

As a Doximity member you'll join over two million verified healthcare professionals in a private, secure network.

  • Connect with other colleagues in the same hospital or clinic
  • Search all U.S. specialist profiles and refer a patient
  • Read the latest clinical news and earn CME/CEU credits

See Dr. Johnson's full profile

Already have an account?

Education & Training

  • University of Nebraska Medical Center College of Medicine
    University of Nebraska Medical Center College of MedicineResidency, Internal Medicine, 1977 - 1980
  • University of Iowa Roy J. and Lucille A. Carver College of Medicine
    University of Iowa Roy J. and Lucille A. Carver College of MedicineClass of 1977

Certifications & Licensure

  • IA State Medical License
    IA State Medical License 1979 - 2025
  • American Board of Internal Medicine Internal Medicine

Publications & Presentations

PubMed

Professional Memberships

Hospital Affiliations