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

James A. Mack, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1669575445

James A. Mack, MD is an Endocrinology, Diabetes & Metabolism Physician in Billings, Montana. Licensed in Montana. Registered with an NPI since 2006.

Licensed in
MT
In the registry since
2006
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

1045 N 30th St
Billings, MT 59101-0733
Phone: (406) 238-2500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 8739 (MT)

Record details

NPI number1669575445
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 6, 2006
Last updated in NPPESFebruary 10, 2022
Certification dateFebruary 10, 2022

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