Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Catherine Regina Silvia, LMSW
Social Worker in Shirley, NY · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1295947539
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Registry record
Entity type Individual (Type 1)
Name Mrs. Catherine Regina Silvia
Credential LMSW
Sex Female
Practice address 1490 William Floyd Pkwy, Shirley, NY, 11967
Phone (631) 924-3741
Enumeration date May 6, 2007
Last updated in NPPES Dec 19, 2011
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 049803-1 (NY) Primary
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 Catherine Silvia?
Catherine Silvia 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
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-19.