Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kathleen Sisti, LMSW
Social Worker in Smithtown, NY · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1144887340
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Registry record
Entity type Individual (Type 1)
Name Kathleen Sisti
Credential LMSW
Sex Female
Practice address 811 W Jericho Tpke Ste 106e, Smithtown, NY, 11787
Phone (631) 265-9850
Fax (631) 265-9852
Enumeration date May 22, 2019
Last updated in NPPES May 22, 2019
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
How do I verify Kathleen Sisti's NPI record?
Cross-check NPI 1144887340 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1144887340 active?
Yes, as of the latest NPPES snapshot, NPI 1144887340 is active (record last updated 2019-05-22).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-22.