Berilonson Stephen Osiro, MD
Internal Medicine Physician · Great Falls, MT
Berilonson Stephen Osiro, MD is an internal medicine physician with a practice address in Great Falls, Montana, and NPI 1356748859, issued on Nov 26, 2014. Check the license (Montana 52398, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Berilonson Stephen Osiro
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 52398 MT
01090731A IN
Self-reported in NPPES; status is on the state search - Practice location
- 1401 25TH St S, Great Falls, MT 59405
- Phone
- (406) 731-8888
- Enumerated
- Nov 26, 2014
- Record last updated
- Aug 23, 2023
- Medicare enrollment
- Enrolled (PECOS I20230825002388); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 324 in Montana → Look up another NPI →
Also registered at 1401 25TH St S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lily AvgustovskiyNurse Practitioner1093122335
Verify Berilonson Stephen Osiro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 52398Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
239 Medicare Part D claims for 122 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone18 claims
- Furosemide17 claims
- Amoxicillin-Clavulanate Potass15 claims
- Clopidogrel11 claims
- Metoprolol Succinate11 claims
- Pantoprazole Sodium11 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): 80.5 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).
Bills Medicare through 2 group practices
- Indiana University Health Southern Indiana Physicians LLCBloomington, IN
- IU Health Medical Group LLCIndianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Berilonson Stephen Osiro among 324 internal medicine physician records in Montana
Berilonson Stephen Osiro, 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 2014, is newer than 80% of them.
- NPI issued2014 · 80% of these records are older, 19% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2011 · median 2006 among the 191 with a school on file
- Record last updated2023 · 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).
21 internal medicine physician records list a practice address in Great Falls
They are 21 of the 1,798 NPPES records with a practice address in Great Falls, and 324 internal medicine physician records in Montana.
All 324 in Montana → Every provider in Great Falls → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Kathleen Blair, DOGreat Falls, MT 594051346335189
- Lorenzo Boccuzzi, D.O.Great Falls, MT 594051598734980
- Gary Buffington, MDGreat Falls, MT 594051922009802
- Steven Chrzanowski, MDGreat Falls, MT 594051568454692
- Eve Gerasimou, MDGreat Falls, MT 594051457312464
- Stacy Kingsland, MDGreat Falls, MT 594051528160173
Common questions
What is Berilonson Stephen Osiro, MD's NPI number?
Berilonson Stephen Osiro, MD's National Provider Identifier (NPI) is 1356748859, issued on Nov 26, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Berilonson Stephen Osiro, MD located?
The NPPES record lists a practice address at 1401 25TH St S, Great Falls, MT, 59405. Phone: (406) 731-8888. Providers update this record themselves, so call before visiting.
How can I verify Berilonson Stephen Osiro, MD's license?
NPPES lists Montana license number 52398, 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 Berilonson Stephen Osiro, MD prescribe under Medicare Part D?
In 2024, Berilonson Stephen Osiro, MD had 239 Medicare Part D claims for 122 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Berilonson Stephen Osiro, MD's MIPS final score?
The 2023 MIPS final score is 80.5 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.