Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Claude Hamilton, M.D.

Surgery Physician in The Dalles, OR · enumerated 2006.

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

National Provider Identifier

1396765038

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Registry record

Entity type Individual (Type 1)

Name William Claude Hamilton

Credential M.D.

Sex Male

Practice address 1700 E 19th St, The Dalles, OR, 97058

Phone (541) 506-6424

Fax (541) 296-7650

Enumeration date Jul 19, 2006

Last updated in NPPES Jan 22, 2014

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD14571 (OR) Primary

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
1035179	Medicaid	WA	-
165522	Medicaid	OR	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is William Hamilton?

William Hamilton 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-22.