Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Danielle Siegfried, LCSW
Social Worker in Islip, NY · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1386317360
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Registry record
Entity type Individual (Type 1)
Name Danielle Siegfried
Credential LCSW
Sex Female
Practice address 65 Union Ave, Islip, NY, 11751
Phone (631) 335-7285
Enumeration date Jul 27, 2021
Last updated in NPPES Dec 3, 2024
Taxonomy & licenses
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 098892-01 (NY) Secondary
104100000X Social Worker Behavioral Health & Social Service Providers · License 112237-01 (NY) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy.
About the LCSW 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.
Frequently asked questions
What is the NPI number for Danielle Siegfried?
The National Provider Identifier (NPI) for Danielle Siegfried is 1386317360, a Type 1 (individual) record in the CMS NPPES registry.
Where does Danielle Siegfried practice?
The practice location on file with NPPES is in Islip, NY. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-03.