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

Dr. Benjamin William Simpson, MD

Individual provider Family Medicine Physician · NPI 1538502521

Dr. Benjamin William Simpson, MD is registered under Family Practice in Lewistown, Montana. Qualified in 2013, 13 years ago. Practices with Central Montana Medical Facilities Inc, a 26-clinician group and accepts Medicare assignment. Licensed in Montana and Washington.

Years since qualifying
13
Licensed in
MT, WA
In the registry since
2013
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

408 Wendell Ave
Lewistown, MT 59457-2261
Phone: (406) 535-1502
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MED-PHYS-LIC-57836 (MT)
Family Medicine Physician Taxonomy 207Q00000X · Licence MD60587849 (WA)

Record details

NPI number1538502521
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 9, 2013
Last updated in NPPESSeptember 12, 2022
Certification dateSeptember 12, 2022

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Central Montana Medical Facilities Inc — 26 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 patients24
Services billed 71 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Central Montana Medical Facilities Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 26 clinicians in the practice; 12 are shown here.

Other providers in Lewistown