Summary

Dr. James Mack specializes in endocrinology, diabetes, and metabolism, bringing nearly four decades of medical expertise to his practice. He earned his medical degree from the University of Washington School of Medicine and completed his residency at the prestigious Mayo Clinic and Medical School. With 39 years of experience treating complex hormonal and metabolic conditions, Dr. Mack has developed deep expertise in helping patients manage diabetes and other endocrine disorders. He is fluent in English.

Dr. Mack practices at Billings Clinic Hospital in Billings, Montana. His clinical focus includes treating metabolic bone disease and osteoporosis, conditions that affect bone strength and density. He also specializes in managing pituitary and adrenal disorders, which involve critical hormone-producing glands. Dr. Mack performs breast cancer screening procedures, including advanced imaging techniques like digital breast tomosynthesis for early detection. Patients have given him an average rating of 3.8 out of 5 stars.
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Overview based on verified provider data

Quick Facts

  • 3.8
  • 39 years of experience
  • 3 insurance plans accepted
  • speaks English
  • Mayo Clinic And Medical School
  • 5 written reviews
  • 2 specialties
  • 20 areas of expertise
  • 1 board certification
  • 1 hospital affiliation
  • 1 office location
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Location

James A Mack

1045 N 30th StBillings, MT 59101

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James A Mack, MDJusten W Rudolph, MDColleen L Wood, MDAnita Azam, MD
Endocrinology, Diabetes & MetabolismEndocrinology, Diabetes & MetabolismEndocrinology, Diabetes & MetabolismEndocrinology, Diabetes & Metabolism
Accepts New Patients Accepts New Patients Accepts New Patients
3.8 
39 Years of Experience 24 Years of Experience 21 Years of Experience 25 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks Spanish, English Speaks English, Spanish
Billings , MTBillings , MTBillings , MTBillings , MT
Med School: University Of Washington School Of Medicine Med School: University Of Washington School Of Medicine Med School: University Of Washington School Of Medicine Med School: Bangladesh Medical Colleg
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Insurance Plans Accepted by James A Mack

  • Accepts Medicare
  • Accepts Medicaid
  • Blue Cross Blue Shield of Montana
  • Medicaid - Medicaid (Managed)
  • UnitedHealthcare

Medical Specialties

James A Mack has the following 2 specialties

Specialty Expertise

James A Mack has the following 20 areas of expertise

  • Acromegaly
  • Addison Disease
  • Adrenal Gland Diseases
  • Cushing Disease
  • Diabetes
  • Diabetes (Types I & II)
  • Diabetes Mellitus, Type 1
  • Diabetes, Type 2
  • Endocrinology & Metabolism
  • Fatigue
  • Gland Issues
  • Hormones
  • Hyperthyroidism
  • Hypopituitarism
  • Hypothyroidism
  • Infertility
  • Osteoporosis
  • Pituitary Diseases
  • Thyroid Diseases
  • Women's Health

Certifications, License, & Education

39 Years Experience

James A Mack holds an expired medical license in the state of Montana.

Medical License

Medical Doctor with an expired medical license in the state of Montana that expired in 2025.

Education & Training

Residency

Completed their residency at Mayo Clinic And Medical School.

Medical School

Graduated from University Of Washington School Of Medicine in 1987.

NPI Number

James A Mack's NPI number is 1669575445.

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Frequently Asked Questions

Is James Mack accepting new patients?
James Mack has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Does James Mack accept virtual/telehealth appointments?
James Mack has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is James Mack affiliated with?
James Mack is affiliated with Billings Clinic Hospital.
How can I make an appointment with James Mack?
You can find contact information for James Mack here on Vitals.
What languages does James Mack speak?
James Mack speaks English.

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