Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. David Joseph Mahoney, PHD

Psychologist in Whitefish, MT · enumerated 2007.

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

National Provider Identifier

1609900471

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Registry record

Entity type Individual (Type 1)

Name Dr. David Joseph Mahoney

Credential PHD

Sex Male

Practice address Whitefish, MT, 59937

Phone (406) 257-1731

Enumeration date Mar 15, 2007

Last updated in NPPES Jan 2, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License KY367 (KY) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License MT # 378 (MT) Primary

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

Other identifiers

Identifier	Type	State	Issuer
MT# 378	Other	MT	LICENSE - PSYCHOLOGIST

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

Where does David Mahoney practice?

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

What is the NPI number for David Mahoney?

The National Provider Identifier (NPI) for David Mahoney is 1609900471, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-02.