Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas Milleson, MD

Specialist in Hillsboro, OR · enumerated 2007.

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

National Provider Identifier

1487780722

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas Milleson

Credential MD

Sex Male

Practice address 335 Se 8th Ave, Hillsboro, OR, 97123

Phone (503) 681-1000

Fax (503) 681-1796

Enumeration date Feb 23, 2007

Last updated in NPPES Apr 20, 2010

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD11782 (OR) Primary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD11782 (OR) 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
045810	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 Thomas Milleson?

Thomas Milleson is registered in NPPES with the primary taxonomy of Specialist. 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 2010-04-20.