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

Deirdre Twomey, OT

Pediatric Occupational Therapist in Livingston, NJ · enumerated 2010.

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

National Provider Identifier

1699089144

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Registry record

Entity type Individual (Type 1)

Name Deirdre Twomey

Credential OT

Sex Female

Practice address Livingston, NJ, 07039

Phone (973) 535-5010

Fax (973) 535-8616

Enumeration date Jul 27, 2010

Last updated in NPPES Jul 27, 2010

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

Taxonomy & licenses

225XP0200X Pediatric Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 46TR00114700 (NJ) Primary

OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT 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 Deirdre Twomey?

The National Provider Identifier (NPI) for Deirdre Twomey is 1699089144, a Type 1 (individual) record in the CMS NPPES registry.

Where does Deirdre Twomey practice?

The practice location on file with NPPES is in Livingston, NJ. 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 2010-07-27.