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

Ms. Gwendolen Diana Leible Arnzen, L-M.H.C.

Mental Health Counselor in Southampton, NY · enumerated 2007 · practices at Samantha Hiotakis LLC.

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

National Provider Identifier

1073792537

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Registry record

Entity type Individual (Type 1)
Name Ms. Gwendolen Diana Leible Arnzen
Credential L-M.H.C.
Sex Female
Practice address Southampton, NY, 11968
Phone (631) 786-2566
Enumeration date Oct 31, 2007
Last updated in NPPES Oct 31, 2007

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 001375 (NY) 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 Gwendolen Leible Arnzen practice?
The practice location on file with NPPES is in Southampton, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gwendolen Leible Arnzen?
The National Provider Identifier (NPI) for Gwendolen Leible Arnzen is 1073792537, 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 2007-10-31.