Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen Kent Riffenburgh, M.D.

Orthopaedic Surgery Physician in Florence, OR · enumerated 2006.

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

National Provider Identifier

1164581161

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Kent Riffenburgh

Credential M.D.

Sex Male

Practice address 530 9th Street, Orthopedics, Florence, OR, 97439

Phone (541) 997-7104

Fax (541) 997-5975

Enumeration date Dec 6, 2006

Last updated in NPPES Feb 29, 2016

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License MD156583 (OR) Primary

174400000X Specialist Other Service Providers Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Stephen Riffenburgh?

Stephen Riffenburgh is registered in NPPES with the primary taxonomy of Orthopaedic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-29.