Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Ludemann, M.D. PH.D.

Surgery Physician in Clackamas, OR · enumerated 2006.

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

National Provider Identifier

1356354161

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Ludemann

Credential M.D. PH.D.

Sex Male

Practice address 10100 Se Sunnyside Rd, Clackamas, OR, 97015

Phone (503) 571-3066

Fax (503) 571-3069

Enumeration date Aug 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD23450 (OR) Primary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD00042691 (WA) Secondary

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 Robert Ludemann?

Robert Ludemann is registered in NPPES with the primary taxonomy of Surgery 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 2007-07-08.