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William Arnold Horton, MD

Clinical Molecular Genetics Physician in Portland, OR · enumerated 2006.

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

National Provider Identifier

1740393552

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Registry record

Entity type Individual (Type 1)
Name William Arnold Horton
Credential MD
Sex Male
Practice address 3101 Sw Sam Jackson Park Road, Portland, OR, 97239
Phone (503) 221-1537
Fax (503) 221-3451
Enumeration date Aug 16, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207SG0203X Clinical Molecular Genetics Physician Allopathic & Osteopathic Physicians · License MD18607 (OR) Primary
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

What is the NPI number for William Horton?
The National Provider Identifier (NPI) for William Horton is 1740393552, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Horton practice?
The practice location on file with NPPES is in Portland, OR. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.