Stephen John Mest, MD
Internal Medicine Physician · Helena, MT
Stephen John Mest, MD is an internal medicine physician with a practice address in Helena, Montana, and NPI 1093816621, issued on Sep 26, 2006. Check the license (Montana 8243, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Stephen John Mest
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 8243 MT
Self-reported in NPPES; status is on the state search - Practice location
- 2475 Broadway, Helena, MT 59601
- Phone
- (406) 457-4180
- Enumerated
- Sep 26, 2006
- Record last updated
- Apr 12, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid ID
- 0086258 MT
- Medicare enrollment
- Enrolled (PECOS I20040123001062); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 324 in Montana → Look up another NPI →
Also registered at 2475 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gregory Normandin, MDHospitalist Physician1598858326
- Jessica Pipinich, PHARMDPharmacist1255500831
- Cassie Searle, PA-CPhysician Assistant1184877029
Verify Stephen John Mest in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 8243Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
180 Medicare Part D claims for 78 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium14 claims
- Cefdinir11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- St Peters HealthHelena, MT · Acute Care Hospitals3 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Stephen John Mest among 324 internal medicine physician records in Montana
Stephen John Mest, MD is one of 324 internal medicine physician records with a practice address in Montana. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 44% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1993 · median 2006 among the 191 with a school on file
- Record last updated2018 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 internal medicine physician records list a practice address in Helena
They are 16 of the 1,591 NPPES records with a practice address in Helena, and 324 internal medicine physician records in Montana.
All 324 in Montana → Every provider in Helena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Faust Alvarez, MDHelena, MT 596011962516070
- Jeannie Brandt, M.D.Helena, MT 596011669531638
- Tracy Dill, MDHelena, MT 596011043311673
- William Fernandez, M.D.Helena, MT 596011104805662
- Andrew Fisher, DOHelena, MT 596011104576867
- Janice Griffin, MDHelena, MT 596011801964804
- Virginia Harrison, MDHelena, MT 596011669573291
- David Jordan, MDHelena, MT 596011386633378
Common questions
What is Stephen John Mest, MD's NPI number?
Stephen John Mest, MD's National Provider Identifier (NPI) is 1093816621, issued on Sep 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen John Mest, MD located?
The NPPES record lists a practice address at 2475 Broadway, Helena, MT, 59601. Phone: (406) 457-4180. Providers update this record themselves, so call before visiting.
How can I verify Stephen John Mest, MD's license?
NPPES lists Montana license number 8243, 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 Stephen John Mest, MD prescribe under Medicare Part D?
In 2024, Stephen John Mest, MD had 180 Medicare Part D claims for 78 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Stephen John Mest, MD's MIPS final score?
The 2023 MIPS final score is 81.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.