Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Stephen John Mest, MD

Individual provider Hospitalist Physician · NPI 1093816621

Dr. Stephen John Mest, MD practises Internal Medicine in Helena, Montana. Graduated from University of Washington School of Medicine in 1993, 33 years ago. Practices with St Peters Health, a 206-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
33
Trained at
University of Washington School of Medicine
Licensed in
MT
In the registry since
2006
Specialties on file
2
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

2475 Broadway
Helena, MT 59601
Phone: (406) 457-4180
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 8243 (MT)
Hospitalist Physician Taxonomy 208M00000X · Licence 8243 (MT)

Record details

NPI number1093816621
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 26, 2006
Last updated in NPPESApril 12, 2018

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Group practice St Peters Health — 206 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients258
Services billed 676 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • St Peters Health Hospital · Helena, MT
  • Billings Clinic Broadwater Hospital · Townsend, MT

Colleagues at St Peters Health

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 206 clinicians in the practice; 12 are shown here.

Other providers in Helena