NPI Portal NPI Lookup & Verification

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

Katherine Tommaso

Clinical Social Worker in Metuchen, NJ · enumerated 2018.

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

National Provider Identifier

1023593639

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Registry record

Entity type Individual (Type 1)
Name Katherine Tommaso
Sex Female
Practice address Metuchen, NJ, 08840
Phone (908) 514-8590
Enumeration date Sep 28, 2018
Last updated in NPPES Jan 31, 2019

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 37LC00196100 (NJ) Secondary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 44SC05493800 (NJ) Primary

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 Katherine Tommaso practice?
The practice location on file with NPPES is in Metuchen, NJ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Katherine Tommaso?
The National Provider Identifier (NPI) for Katherine Tommaso is 1023593639, 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 2019-01-31.