Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MICHAEL J HENNESSY MD
NPI 1124029616
Orthopaedic Surgery in Great Falls, MT

Active since August 09, 2005
3000 16TH AVE S, GREAT FALLS, MT 59405(406) 454-2171(406) 771-3021 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Michael J Hennessy Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MICHAEL J HENNESSY MD (NPI 1124029616) is an individual orthopaedic surgery provider in Great Falls, Montana, licensed in Montana (7944) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1124029616
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameMICHAEL J HENNESSYCredential: MD
Location Address3000 16TH AVE SGreat Falls, MT 59405
Mailing Address1400 29th St SGreat Falls, MT 59405-5353 · (406) 454-2171 · Fax (406) 771-3021
Fax(406) 771-3021
Sole ProprietorNo
Enumeration DateAugust 9, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1124029616 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License Licensed in MT · 7944
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
3000 16TH AVE S, Great Falls, MT 59405

Other Identifiers 1

Medicaid0015587MT

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michael Hennessy's NPI number?

The NPI number for Michael Hennessy is 1124029616. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

Where is Michael Hennessy located?

Michael Hennessy practices at 3000 16th Ave S, Great Falls, MT 59405. The listed phone number is (406) 454-2171.

What is Michael Hennessy's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

When was this NPI record last updated?

The NPPES record for Michael Hennessy was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.