Dr. Thomas J Zwicker, PH.D., BCBA-D

Dr. Thomas J Zwicker is a Behavior Analyst provider (Behavior Analyst) practicing in Hamden, CT, registered in the NPPES registry with NPI 1093021941 since 2010. The credential PHD stands for Doctor of Philosophy. Practices at Zaba Therapy, LLC (listed at the same practice address in NPPES).

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NPI	1093021941
Entity type	Individual (Type 1)
Name	Dr. Thomas J Zwicker
Credential	PH.D., BCBA-D
Sex	Male
Practice address	34 WOODLAWN ST, Hamden, CT, 06517
Phone	2039010646
Fax	4752272242
Enumeration date	2010-08-28
Last updated in NPPES	2022-10-10

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103K00000X	Behavior Analyst	Secondary	1-10-7036	—
103K00000X	Behavior Analyst	Secondary	000162	NY
103K00000X	Behavior Analyst	Primary	299	CT

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

Copy-ready billing details

Provider: Thomas Zwicker, PH.D., BCBA-D
NPI: 1093021941
Taxonomy: 103K00000X (Behavior Analyst)
Address: 34 WOODLAWN ST, Hamden, CT, 06517

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1871986059	Zaba Therapy, LLC	Organization	Behavior Analyst	Hamden, CT
1790229797	Brieana Watson	Individual	Behavior Analyst	Hamden, CT

Verify this record

Cross-check NPI 1093021941 against the authoritative CMS record: view Dr. Thomas J Zwicker on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

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.

What specialty is Thomas Zwicker?

Thomas Zwicker is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-10-10.