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

Deborah L. Mazza, LCSW

Marriage & Family Therapist in New Haven, CT · enumerated 2006.

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

National Provider Identifier

1750488524

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Registry record

Entity type Individual (Type 1)

Name Deborah L. Mazza

Credential LCSW

Sex Female

Practice address New Haven, CT, 06511

Phone (203) 772-3842

Enumeration date Sep 20, 2006

Last updated in NPPES Sep 11, 2025

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 000225 (CT) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 000313 (CT) 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
000225	Other	CT	LCSW
052298	Other	CT	VALUE OPTIONS
140000225CT02	Other	CT	ANTHEM BLUE CROSS
000313	Other	CT	MFT

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

What specialty is Deborah Mazza?

Deborah Mazza is registered in NPPES with the primary taxonomy of Marriage & Family Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.