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

Ms. Estelle C D'Costa, MSW, LCSW

Clinical Social Worker in Chatham, NJ · enumerated 2007.

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

National Provider Identifier

1205979606

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Registry record

Entity type Individual (Type 1)

Name Ms. Estelle C D'Costa

Credential MSW, LCSW

Sex Female

Practice address Chatham, NJ, 07928

Phone (908) 696-8487

Fax (206) 203-2168

Enumeration date Feb 15, 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

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 44SC00362100 (NJ) 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
238856	Other	-	MANAGED HEALTH NETWORK
NJ44SC00362100	Other	NJ	LICENSED CLINICAL SW
0007800150	Other	-	AETNA BEHAVIORAL HEALTH
P2008179	Other	-	OXFORD INSURANCE

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 Estelle D'Costa?

The National Provider Identifier (NPI) for Estelle D'Costa is 1205979606, a Type 1 (individual) record in the CMS NPPES registry.

Where does Estelle D'Costa practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.