Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alyssa Hennessy, MSW

Specialist in Brewster, NY · enumerated 2024.

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

National Provider Identifier

1346098498

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Registry record

Entity type Individual (Type 1)

Name Alyssa Hennessy

Credential MSW

Sex Female

Practice address 400 Doansburg Rd, Brewster, NY, 10509

Phone (845) 279-2995

Enumeration date May 13, 2024

Last updated in NPPES Jan 21, 2026

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers Secondary

174400000X Specialist Other Service Providers 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Alyssa Hennessy?

The National Provider Identifier (NPI) for Alyssa Hennessy is 1346098498, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alyssa Hennessy practice?

The practice location on file with NPPES is in Brewster, NY. 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 2026-01-21.