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. Johannes Aas, MD is board certified in Internal Medicine.

  • He has special expertise in 1 area:
  • Ulcerative Colitis

Education & Awards

Dr. Aas graduated from Arhus Univ, Det Laegevidenskabelige Fak, Arhus, Denmark.


Dr. Aas has 10 hospital affiliations:

  • Essentia Health – St. Marys Medical Center 
  • St Lukes Hospital Of Duluth 


  • Danish

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Additional Information
Dr. Johannes Aas MD is a male Internist, has 45 years of experience and practices in Internal Medicine.
Where does Dr. Johannes Aas practice?
Dr. Johannes Aas has 3 office locations.
Dr. Johannes Aas practices Internal Medicine near Superior, WI.
Additional practice locations include: Duluth, MN and Hibbing, MN.
See Superior Internists.