Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory Robert Bellantonio, MSW
Social Worker in Freeport, NY · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1740051119
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Registry record
Entity type Individual (Type 1)
Name Gregory Robert Bellantonio
Credential MSW
Sex Male
Practice address 114 Church St, Freeport, NY, 11520
Phone (516) 868-3030
Enumeration date Jan 12, 2024
Last updated in NPPES Jan 12, 2024
Taxonomy & licenses
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.
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 Gregory Bellantonio?
Gregory Bellantonio is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Christine Galante Adult Health Nurse Practitioner · Freeport, NY NPI 1164428504 Nerica Coley Social Worker · Freeport, NY NPI 1457037822 Karline Henry-Triebel Contractor · Freeport, NY NPI 1225715865 Dana Bazemore-Jolly Social Worker · Freeport, NY NPI 1740962562 Michael Stashin Social Worker · Freeport, NY NPI 1437932811 Rosangela Guzman Social Worker · Freeport, NY NPI 1134902661 Keesha Souvenir Mental Health Counselor · Freeport, NY NPI 1780457630 Jamelia Allison Behavior Technician · Freeport, NY NPI 1790556207
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-12.