DR. BERILONSON STEPHEN OSIRO MD
NPI 1356748859
Internal Medicine in Great Falls, MT
About Dr. Berilonson Stephen Osiro Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BERILONSON STEPHEN OSIRO MD (NPI 1356748859) is an individual internal medicine provider in Great Falls, Montana, licensed in Indiana (01090731A) and active in the NPI registry since November 2014. He is enrolled in Medicare PECOS, is affiliated with Indiana University Health Bloomington Hospital, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Berilonson Stephen Osiro Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Berilonson Osiro reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Great Falls, MT 59405
- Reassigned Medicare billing, Montana enrollment
- 637 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 5,212 clinicians in this Medicare group
Bloomington, IN 47408
- Reassigned Medicare billing, Indiana enrollment
- 783 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Indiana University Health Bloomington Hospital
Acute Care Hospitals · Bloomington, INIndiana University Health
Acute Care Hospitals · Indianapolis, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 59405 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GREAT FALLS, MT 59405
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Berilonson Osiro's NPI number?
The NPI number for Berilonson Osiro is 1356748859. It was assigned to this individual provider in the NPPES registry on November 26, 2014.
Where is Berilonson Osiro located?
Berilonson Osiro practices at 1401 25th St S, Great Falls, MT 59405. The listed phone number is (406) 731-8888.
What is Berilonson Osiro's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Berilonson Osiro enrolled in Medicare?
Yes. Berilonson Osiro is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Berilonson Osiro's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Berilonson Osiro reassigns Medicare benefits to 3 organizations: Benefis Hospitals, Inc. (Great Falls, MT), Iu Health Medical Group, LLC (Indianapolis, IN) and Indiana University Health Southern Indiana Physicians, LLC (Bloomington, IN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Berilonson Osiro's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Berilonson Osiro accept?
Health plans from CareSource and Cigna Healthcare list Berilonson Osiro as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Berilonson Osiro affiliated with any hospitals?
According to CMS data, Berilonson Osiro is affiliated with Indiana University Health Bloomington Hospital and Indiana University Health.
When was this NPI record last updated?
The NPPES record for Berilonson Osiro was last updated on August 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Berilonson Stephen Osiro, MD · NPI 1356748859
Internal Medicine physician in Great Falls, Montana. Individual provider, active in the CMS NPPES registry since November 26, 2014.
## Identity
- **NPI:** 1356748859 (Entity type: Individual)
- **Enumerated:** November 26, 2014
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 01090731A (Indiana)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1401 25TH ST S, Great Falls, MT 59405-5183
- **Phone:** (406) 731-8888
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Benefis Hospitals, Inc. (NPI 1881650737, Great Falls, MT); Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN); Indiana University Health Southern Indiana Physicians, LLC (NPI 1013953983, Bloomington, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** August 23, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1356748859) · Data from the CMS NPPES public registry.