Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Nash
Specialist in Sayville, NY · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841609534
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Registry record
Entity type Individual (Type 1)
Name William Nash
Sex Male
Practice address 66 Lakeland Ave, Sayville, NY, 11782
Phone (631) 678-3062
Enumeration date Aug 6, 2014
Last updated in NPPES Aug 6, 2014
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
What is the NPI number for William Nash?
The National Provider Identifier (NPI) for William Nash is 1841609534, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Nash practice?
The practice location on file with NPPES is in Sayville, 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 2014-08-06.