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

Ms. Wendy Janine Gottlieb-Sass, LCSW-R

Mental Health Counselor in Buffalo, NY · enumerated 2007 · practices at Stephen Miller, Lmft.

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

National Provider Identifier

1265582639

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Registry record

Entity type Individual (Type 1)

Name Ms. Wendy Janine Gottlieb-Sass

Credential LCSW-R

Sex Female

Practice address Buffalo, NY, 14209

Phone (716) 886-7304

Fax (716) 886-7398

Enumeration date Jan 10, 2007

Last updated in NPPES Jul 8, 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 R030061-1 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Wendy Gottlieb-Sass practice?

The practice location on file with NPPES is in Buffalo, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Wendy Gottlieb-Sass?

The National Provider Identifier (NPI) for Wendy Gottlieb-Sass is 1265582639, 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 2007-07-08.