RAGNVALDR BUCK BJORNSSON MD
NPI 1851379119
Emergency Medicine in Rock Springs, WY
About Ragnvaldr Buck Bjornsson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RAGNVALDR BUCK BJORNSSON MD (NPI 1851379119) is an individual emergency medicine provider in Rock Springs, Wyoming, licensed in Wyoming (6690A) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital Of Carbon County, and is a graduate of Stanford University School Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 4
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
Ragnvaldr Buck Bjornsson 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
2Medicare enrollment records show Ragnvaldr Bjornsson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rock Springs, WY 82901
- Reassigned Medicare billing, Wyoming enrollment
- 91 clinicians in this Medicare group
Rawlins, WY 82301
- Reassigned Medicare billing, Wyoming enrollment
- Also billed through NPI 1710298757 (Wyoming)
- 43 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hospital Of Carbon County
Critical Access Hospitals · Rawlins, WYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 82901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
ROCK SPRINGS, WY 82901
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 Ragnvaldr Bjornsson's NPI number?
The NPI number for Ragnvaldr Bjornsson is 1851379119. It was assigned to this individual provider in the NPPES registry on January 6, 2006. The provider is also known as Stephen Wallace.
Where is Ragnvaldr Bjornsson located?
Ragnvaldr Bjornsson practices at 1200 College Dr, Rock Springs, WY 82901. The listed phone number is (307) 362-3711.
What is Ragnvaldr Bjornsson's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Ragnvaldr Bjornsson enrolled in Medicare?
Yes. Ragnvaldr Bjornsson 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 Ragnvaldr Bjornsson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ragnvaldr Bjornsson reassigns Medicare benefits to 2 organizations: University Of Utah Adult Services (Rock Springs, WY) and Memorial Hospital Of Carbon County (Rawlins, WY). 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 Ragnvaldr Bjornsson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ragnvaldr Bjornsson accept?
Health plans from Blue Cross Blue Shield of Wyoming list Ragnvaldr Bjornsson 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 Ragnvaldr Bjornsson affiliated with any hospitals?
According to CMS data, Ragnvaldr Bjornsson is affiliated with Memorial Hospital Of Carbon County.
When was this NPI record last updated?
The NPPES record for Ragnvaldr Bjornsson was last updated on January 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.
# Ragnvaldr Buck Bjornsson, MD · NPI 1851379119
Emergency Medicine physician in Rock Springs, Wyoming. Individual provider, active in the CMS NPPES registry since January 6, 2006.
## Identity
- **NPI:** 1851379119 (Entity type: Individual)
- **Enumerated:** January 6, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 6690A (Wyoming)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1200 COLLEGE DR, Rock Springs, WY 82901-5868
- **Phone:** (307) 362-3711 · **Fax:** (307) 352-8178
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): University Of Utah Adult Services (NPI 1487032363, Rock Springs, WY); Memorial Hospital Of Carbon County (NPI 1417031311, Rawlins, WY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 1998
## Record status
- **NPPES last updated:** January 23, 2026
- **Other identifiers:** Other 58024 (ID); Medicaid 806470900 (ID); Other 605960009 (WY); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1851379119) · Data from the CMS NPPES public registry.