Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Jan I Weiss, LMSW
Social Worker in Port Chester, NY · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1578633103
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Registry record
Entity type Individual (Type 1)
Name Mr. Jan I Weiss
Credential LMSW
Sex Male
Practice address 1 Gateway Plaza, Port Chester, NY, 10573
Phone (914) 937-2320
Fax (914) 937-3183
Enumeration date Nov 9, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 0219531 (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.
Frequently asked questions
Is NPI 1578633103 active?
Yes, as of the latest NPPES snapshot, NPI 1578633103 is active (record last updated 2007-07-08).
How do I verify Jan Weiss's NPI record?
Cross-check NPI 1578633103 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 2007-07-08.