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

Dr. Theresa Loscalzo Bacaris, OD

Optometrist in Mastic, NY · enumerated 2006.

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

National Provider Identifier

1720162431

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Registry record

Entity type Individual (Type 1)

Name Dr. Theresa Loscalzo Bacaris

Credential OD

Sex Female

Practice address Mastic, NY, 11950

Phone (631) 281-2474

Fax (631) 281-2476

Enumeration date Oct 25, 2006

Last updated in NPPES Apr 1, 2016

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License VUT004799-1 (NY) Primary

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

Other identifiers

Identifier	Type	State	Issuer
26993	Other	NY	SPECTERA
34416	Other	NY	AVESIS
201972162	Other	NY	NVA
2136929	Other	NY	VYTRA
201972162	Other	NY	COMP BENEFITS
201972162	Other	NY	HORIZON HEALTHCARE
6599195	Other	NY	GHI
921377	Other	NY	BLOCK VISION
NY0047	Other	NY	EYEMED
198546P	Other	NY	HIP
201972162	Other	NY	ISLAND GROUP ADMINISTATOR
P3548978	Other	NY	OXFORD

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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

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.

What specialty is Theresa Bacaris?

Theresa Bacaris 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.

Other providers at this practice address

Browse all →

Long Island Optometric Eyecare,PC Optometrist · Mastic, NY NPI 1750738944 Amanda Schnettler Social Worker · Mastic, NY NPI 1184115131 Svc of Mastic LLC Optometrist · Mastic, NY NPI 1831708353 Amy Hodge Social Worker · Mastic, NY NPI 1083380406 Jessica Allers Social Worker · Mastic, NY NPI 1205506375 Christian Creed Clinical Social Worker · Mastic, NY NPI 1972263150 Heather O'Connor Mental Health Counselor · Mastic, NY NPI 1013604248 Hanan Saleh Optometrist · Mastic, NY NPI 1467236133

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-01.