Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel Derienzis, LMSW

Social Worker in Hempstead, NY · enumerated 2011.

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

National Provider Identifier

1699063008

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Registry record

Entity type Individual (Type 1)

Name Daniel Derienzis

Credential LMSW

Sex Male

Practice address 175 Fulton Ave, 309, Hempstead, NY, 11550

Phone (516) 485-5710

Fax (516) 485-4225

Enumeration date Jul 19, 2011

Last updated in NPPES Jul 19, 2011

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 075471 (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.

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Frequently asked questions

What specialty is Daniel Derienzis?

Daniel Derienzis 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.

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 2011-07-19.