Benjamin William Simpson, M.D.
Family Medicine Physician · Lewistown, MT
Benjamin William Simpson, M.D. is a family medicine physician with a practice address in Lewistown, Montana, and NPI 1538502521, issued on Apr 9, 2013. Check the license (Montana MED-PHYS-LIC-57836, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Benjamin William Simpson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- MED-PHYS-LIC-57836 MT
MD60587849 WA
Self-reported in NPPES; status is on the state search - Practice location
- 408 Wendell Ave, Lewistown, MT 59457
- Phone
- (406) 535-1502
- Enumerated
- Apr 9, 2013
- Record last updated
- Sep 12, 2022
- Medicare enrollment
- Enrolled (PECOS I20170825002960); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Also registered at 408 Wendell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amie Baguer, FNPFamily Nurse Practitioner1144198763
- Laura Bennett, MDFamily Medicine Physician1639120546
- Justin BerklovichPhysical Therapy Assistant1609439041
- Shaun Biddle, PT, DPTPhysical Therapist1831477165
Verify Benjamin William Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license MED-PHYS-LIC-57836Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average family medicine physician in 2024
1,984 Medicare Part D claims for 144 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 98 claims were for opioids.
Most prescribed
- Atorvastatin Calcium125 claims
- Levothyroxine Sodium111 claims
- Losartan Potassium72 claims
- Hydrocodone-Acetaminophen64 claims
- Omeprazole52 claims
- Albuterol Sulfate Hfa48 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Central Montana Medical Facilities IncLewistown, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Benjamin William Simpson among 775 family medicine physician records in Montana
Benjamin William Simpson, M.D. is one of 775 family medicine physician records with a practice address in Montana. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 75% of them.
- NPI issued2013 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2013 · median 2007 among the 464 with a school on file
- Record last updated2022 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 family medicine physician records list a practice address in Lewistown
They are 13 of the 175 NPPES records with a practice address in Lewistown, and 775 family medicine physician records in Montana.
All 775 in Montana → Every provider in Lewistown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Laura Bennett, MDLewistown, MT 594571639120546
- Annette Comes, MDLewistown, MT 594571346247087
- Jacob Forke, M.D.Lewistown, MT 594571902127756
- Danny Harbour, M.D.Lewistown, MT 594571235248584
- Melanie Hardy, DOLewistown, MT 594571891941662
- Cathy Holmes, D.O.Lewistown, MT 594571164413969
- William Holmes, D.O.Lewistown, MT 594571053302794
- Cassandra Lopez, MDLewistown, MT 594571669859971
Common questions
What is Benjamin William Simpson, M.D.'s NPI number?
Benjamin William Simpson, M.D.'s National Provider Identifier (NPI) is 1538502521, issued on Apr 9, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin William Simpson, M.D. located?
The NPPES record lists a practice address at 408 Wendell Ave, Lewistown, MT, 59457. Phone: (406) 535-1502. Providers update this record themselves, so call before visiting.
How can I verify Benjamin William Simpson, M.D.'s license?
NPPES lists Montana license number MED-PHYS-LIC-57836, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Benjamin William Simpson, M.D. prescribe under Medicare Part D?
In 2024, Benjamin William Simpson, M.D. had 1,984 Medicare Part D claims for 144 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.