Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary G Olsen, PHD
Psychologist in Tigard, OR · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669555363
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Registry record
Entity type Individual (Type 1)
Name Dr. Mary G Olsen
Credential PHD
Sex Female
Practice address 6940 Sw Baylor St, Tigard, OR, 97223
Phone (503) 684-6345
Fax (503) 968-9522
Enumeration date Oct 24, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
Frequently asked questions
Where does Mary Olsen practice?
The practice location on file with NPPES is in Tigard, OR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Olsen?
The National Provider Identifier (NPI) for Mary Olsen is 1669555363, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.