Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mary Sullivan, M.S.
Specialist in Hicksville, NY · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164784781
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Registry record
Entity type Individual (Type 1)
Name Mary Sullivan
Credential M.S.
Sex Female
Practice address 3 Hawthorne St, Hicksville, NY, 11801
Phone (516) 932-7655
Enumeration date Jun 10, 2012
Last updated in NPPES Jun 10, 2012
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 NPI 1164784781 active?
Yes, as of the latest NPPES snapshot, NPI 1164784781 is active (record last updated 2012-06-10).
How do I verify Mary Sullivan's NPI record?
Cross-check NPI 1164784781 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-10.