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

Ms. Deborah L Singer, LCSW

Clinical Social Worker in Oyster Bay, NY · enumerated 2006.

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

National Provider Identifier

1164519153

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Deborah L Singer

Credential LCSW

Sex Female

Practice address Oyster Bay, NY, 11771

Phone (516) 647-2296

Fax (516) 624-6778

Enumeration date Oct 10, 2006

Last updated in NPPES Jun 19, 2015

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License RO57801-1 (NY) Secondary

1041S0200X School Social Worker Behavioral Health & Social Service Providers Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License R057801 (NY) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
02622104	Medicaid	NY	-

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 Deborah Singer practice?

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

What is the NPI number for Deborah Singer?

The National Provider Identifier (NPI) for Deborah Singer is 1164519153, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-19.