Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas Blake Hollenbach, PH.D.

Psychologist in Clifton, NJ · enumerated 2007.

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

National Provider Identifier

1225165327

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas Blake Hollenbach

Credential PH.D.

Sex Male

Practice address 1149 Bloomfield Ave, Clifton, NJ, 07012

Phone (973) 365-2300

Fax (973) 365-0868

Enumeration date Feb 27, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 03781 (NJ) Primary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 012226 (NY) Secondary

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

Where does Thomas Hollenbach practice?

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

What is the NPI number for Thomas Hollenbach?

The National Provider Identifier (NPI) for Thomas Hollenbach is 1225165327, 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 2007-07-08.