Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mary Duffy, PHD

Q: What is the NPI number for Mary Duffy?

The National Provider Identifier (NPI) for Mary Duffy is 1952116147, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in White City, OR · enumerated 2025.

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

National Provider Identifier

1952116147

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Registry record

Entity type Individual (Type 1)

Name Dr. Mary Duffy

Credential PHD

Sex Female

Practice address 8495 Crater Lake Hwy, White City, OR, 97503

Phone (541) 826-2111

Enumeration date Feb 12, 2025

Last updated in NPPES Feb 12, 2025

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 3976 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mary Duffy practice?

The practice location on file with NPPES is in White City, OR. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mary Duffy?

The National Provider Identifier (NPI) for Mary Duffy is 1952116147, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-12.