Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Markham Scott Giblin, PHD

Psychologist in Corvallis, OR · enumerated 2006.

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

National Provider Identifier

1013971167

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Registry record

Entity type Individual (Type 1)

Name Mr. Markham Scott Giblin

Credential PHD

Sex Male

Practice address 1300 Nw Harrison Blvd, Ste # 140, Corvallis, OR, 97330

Phone (541) 738-6516

Fax (541) 738-6517

Enumeration date Apr 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 925 (OR) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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 Markham Giblin?

Markham Giblin is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Kimberley Golletz Clinical Psychologist · Corvallis, OR NPI 1437289394 Daniel Golletz Clinical Psychologist · Corvallis, OR NPI 1366573750 Stephanie Shippen Clinical Psychologist · Corvallis, OR NPI 1952567208 Abigail Zanotti Mental Health Counselor · Corvallis, OR NPI 1235451923 Audrey Schwartz Psychologist · Corvallis, OR NPI 1891098893 Christopher Leesman Family Medicine Physician · Corvallis, OR NPI 1982981809 Tracy Lenee Bluhm Marriage & Family Therapist · Corvallis, OR NPI 1811306772 Yu Matsumoto Family Medicine Physician · Corvallis, OR NPI 1801289848

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