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Orthopaedic Surgeon, Surgical Specialist
42 years of experience
Accepting new patients
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).

Learn more about Dr. Michael Hennessy:

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Specialties & Research

Dr. Michael Hennessy, MD is board certified in Orthopaedic Surgery.

  • He has special expertise in 3 areas:
  • Hip Osteoarthritis
  • Knee Osteoarthritis
  • Osteoarthritis (Hand and Wrist)

Education & Awards

Dr. Hennessy graduated from University of Minnesota, Twin Cities, Minneapolis.


Dr. Hennessy has 6 hospital affiliations:

  • Benefis Healthcare 
  • Rady Children`s Hospital - San Diego 

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Additional Information
Dr. Michael John Hennessy MD is a male Orthopaedic Surgeon, has 42 years of experience and practices in Orthopaedic Surgery.
Where does Dr. Michael J. Hennessy practice?
Dr. Michael Hennessy has 2 office locations.
Dr. Michael Hennessy practices Orthopaedic Surgery near Lewistown, MT.
Additional practice locations include: Great Falls, MT.
See Lewistown Orthopedic Surgeons.