Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David Gregory St. John, PHD, LP

Psychologist in Ferndale, MI · enumerated 2006.

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

National Provider Identifier

1760400774

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Registry record

Entity type Individual (Type 1)

Name David Gregory St. John

Credential PHD, LP

Sex Male

Practice address 23231 Woodward Ave, Ferndale, MI, 48220

Phone (734) 325-0491

Enumeration date Jul 17, 2006

Last updated in NPPES Mar 14, 2018

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 6301012887 (MI) 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

What is the NPI number for David St. John?

The National Provider Identifier (NPI) for David St. John is 1760400774, a Type 1 (individual) record in the CMS NPPES registry.

Where does David St. John practice?

The practice location on file with NPPES is in Ferndale, MI. 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 2018-03-14.