Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Sidney S Horowitz, PHD

Psychologist in Waterbury, CT · enumerated 2006.

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

National Provider Identifier

1366551392

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Registry record

Entity type Individual (Type 1)

Name Dr. Sidney S Horowitz

Credential PHD

Sex Male

Practice address 133 Scovill St, Suite 211, Waterbury, CT, 06706

Phone (203) 573-9521

Fax (203) 573-8708

Enumeration date Aug 30, 2006

Last updated in NPPES Sep 2, 2010

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 001070 (CT) 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
004054243	Medicaid	CT	-
060001070CT01	Other	CT	BLUE SHIELD

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 specialty is Sidney Horowitz?

Sidney Horowitz is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-02.