Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Alix Y Lieb

Social Worker in Brewster, NY · enumerated 2021.

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

National Provider Identifier

1245823715

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Registry record

Entity type Individual (Type 1)

Name Ms. Alix Y Lieb

Sex Female

Practice address 155 Main St, Brewster, NY, 10509

Phone (914) 279-6999

Fax (914) 279-0908

Enumeration date Feb 16, 2021

Last updated in NPPES Feb 16, 2021

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 101752 (NY) Primary

Other identifiers

Identifier	Type	State	Issuer
101752	Other	NY	OFFICE OF THE PROFESSIONS

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

Is NPI 1245823715 active?

Yes, as of the latest NPPES snapshot, NPI 1245823715 is active (record last updated 2021-02-16).

How do I verify Alix Lieb's NPI record?

Cross-check NPI 1245823715 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-02-16.