NPI Portal NPI Lookup & Verification

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

Dr. Ruth Laurie Lax, PH.D.

Psychologist in Hempstead, NY · enumerated 2007.

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

National Provider Identifier

1861603474

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Registry record

Entity type Individual (Type 1)
Name Dr. Ruth Laurie Lax
Credential PH.D.
Sex Female
Practice address Hempstead, NY, 11550
Phone (516) 481-3716
Enumeration date May 24, 2007
Last updated in NPPES Sep 11, 2025

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

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 009793-1 (NY) Secondary
103T00000X Psychologist Behavioral Health & Social Service Providers · License 009793-1 (NY) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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 Ruth Lax?
The National Provider Identifier (NPI) for Ruth Lax is 1861603474, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ruth Lax practice?
The practice location on file with NPPES is in Hempstead, 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 2025-09-11.