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Internist, Endocrinologist (diabetes, hormones)
24 years of experience
Accepting new patients
Video profile
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 (2)

The overall average patient rating of Dr. James Mack is Good. Dr. Mack has been reviewed by 8 patients who have provided 2 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 3.4
Promptness 3.7
Courteous Staff 3.6
Accurate Diagnosis 4.1
Bedside Manner 4.3
Spends Time with Me 4.3
Follows Up After Visit 2.6

Specialties & Research

Dr. James Mack, MD is board certified in Endocrinology, Diabetes & Metabolism.

  • He has special expertise in 11 areas:
  • Adrenal Gland Diseases
  • Diabetes
  • Diabetes Complications
  • Diabetes Mellitus
  • Diabetes
  • Infertility
  • Osteoporosis
  • Parathyroid Diseases
  • Pituitary Diseases
  • Thyroid Diseases
  • Women's Health

Education & Awards

Dr. Mack graduated from University of Washington, Seattle. He has 2 awards.

NCQA Diabetes Physician Recognition Program (2013 - 2016)
On-Time Doctor Award (2014)


Dr. Mack has 5 hospital affiliations:

  • St Vincent Healthcare 
  • Deaconess Billings Clinic 

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Additional Information
Dr. James A Mack MD is a male Internist, has 24 years of experience and practices in Internal Medicine and Endocrinology, Diabetes & Metabolism.
Where does Dr. James A. Mack practice?
Dr. James Mack has 1 office location.
Dr. James Mack practices Internal Medicine and Endocrinology, Diabetes & Metabolism near Billings, MT.
See Billings Internists and Billings Endocrinologists.