Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Theresa Catherine Zerilli-Zavgorodni, OD

Optometrist in West Haven, CT · enumerated 2006.

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

National Provider Identifier

1720189566

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Registry record

Entity type Individual (Type 1)

Name Mrs. Theresa Catherine Zerilli-Zavgorodni

Credential OD

Sex Female

Practice address 950 Campbell Ave, West Haven, CT, 06516

Phone (203) 932-5711

Enumeration date Sep 26, 2006

Last updated in NPPES Jun 1, 2023

Taxonomy & licenses

152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License 002655 (CT) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 002655 (CT) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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 Theresa Zerilli-Zavgorodni?

Theresa Zerilli-Zavgorodni is registered in NPPES with the primary taxonomy of Optometrist. 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 2023-06-01.