Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Doreen Marie Zak-Watt, L.C.S.W.
Social Worker in Clarence, NY · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649604091
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Registry record
Entity type Individual (Type 1)
Name Ms. Doreen Marie Zak-Watt
Credential L.C.S.W.
Sex Female
Practice address 10150 Greiner Rd., Clarence Middle School, Clarence, NY, 14031
Phone (716) 407-9209
Fax (716) 407-9243
Enumeration date Aug 21, 2013
Last updated in NPPES Aug 21, 2013
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License R027370-1 (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
Is NPI 1649604091 active?
Yes, as of the latest NPPES snapshot, NPI 1649604091 is active (record last updated 2013-08-21).
How do I verify Doreen Zak-Watt's NPI record?
Cross-check NPI 1649604091 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-21.