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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).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Mark O'Shaughnessy is Excellent. Dr. O'Shaughnessy has been reviewed by 5 patients who have provided 3 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Mark O'Shaughnessy, MD is board certified in Cardiovascular Disease.

  • He has special expertise in 4 areas:
  • Acute Coronary Syndrome (ACS)
  • Heart Block
  • High Blood Pressure (Hypertension)
  • Unstable Angina

Education & Awards

Dr. O'Shaughnessy graduated from Indiana University , Indianapolis.


Dr. O'Shaughnessy has 14 hospital affiliations:

  • Parkview Noble Hospital 
  • Lagrange Community Hospital 


  • Spanish

> > > > Dr. Mark O'Shaughnessy, MD

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Additional Information
Dr. Mark Allen O'Shaughnessy MD is a male Internist, has 24 years of experience and practices in Cardiovascular Disease.
Where does Dr. Mark A. O'Shaughnessy practice?
Dr. Mark O'Shaughnessy has 21 office locations.
Dr. Mark O'Shaughnessy practices Cardiovascular Disease near Columbia City, IN.
Additional practice locations include: Fort Wayne, IN and Auburn, IN.
See Columbia City Cardiologists.