NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ragnvaldr Buck Bjornsson, MD

Emergency Medicine Physician in Rock Springs, WY · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1851379119

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Registry record

Entity type Individual (Type 1)
Name Ragnvaldr Buck Bjornsson
Credential MD
Sex Male
Practice address Rock Springs, WY, 82901
Phone (307) 362-3711
Fax (307) 352-8178
Enumeration date Jan 6, 2006
Last updated in NPPES Jan 23, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 6690A (WY) Primary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License M8716 (ID) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
58024 Other ID BLUE CROSS OF ID
806470900 Medicaid ID -
605960009 Other WY FBL
314686 Other WY BSWY

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Ragnvaldr Bjornsson?
Ragnvaldr Bjornsson is registered in NPPES with the primary taxonomy of Emergency Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-23.