Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mental Health Assoc of Nassau County

Mental Illness Community Based Residential Treatment Facility in Hempstead, NY · enumerated 2007 · authorized official Elaine Elsner, Controller.

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

National Provider Identifier

1942428776

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Registry record

Entity type Organization (Type 2)

Legal business name Mental Health Assoc of Nassau County

Practice address 16 Main St, Hempstead, NY, 11550

Phone (516) 489-2322

Fax (516) 489-2784

Enumeration date Apr 24, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

320800000X Mental Illness Community Based Residential Treatment Facility Residential Treatment Facilities · License 7232431 (NY) Primary

Authorized official

Name Elaine Elsner

Title Controller

Phone (516) 489-2322

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

Where is Mental Health Assoc of Nassau County located?

The practice location on file with NPPES is in Hempstead, NY.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.