Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John J Mazur, MD

Individual provider Pulmonary Disease Physician · NPI 1659364651

John J Mazur, MD is a Pulmonary Disease in Great Falls, Montana. Graduated from University of Michigan Medical School in 1986, 40 years ago. Practices with Great Falls Clinic LLC, a 72-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
40
Trained at
University of Michigan Medical School
Licensed in
MT
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1400 29th St S
Great Falls, MT 59405-5353
Phone: (406) 454-2171
Fax: (406) 771-3021
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 12032 (MT)

Record details

NPI number1659364651
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 24, 2005
Last updated in NPPESAugust 10, 2011
Mailing address1400 29th St S, Great Falls, MT 59405-5353

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPULMONARY DISEASE
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1986 (40 years in practice)
Group practice Great Falls Clinic Llc — 72 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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