Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marie Antoine Mathieu, MSW
Social Worker in Silver Spring, MD · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1609051648
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Registry record
Entity type Individual (Type 1)
Name Marie Antoine Mathieu
Credential MSW
Sex Female
Practice address 1398 Lamberton Dr, Silver Spring, MD, 20902
Phone (301) 754-1102
Fax (301) 754-1690
Enumeration date Jan 9, 2008
Last updated in NPPES Dec 8, 2011
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 6801089744 (MI) Primary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 16851 (MD) Secondary
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 Marie Mathieu?
The National Provider Identifier (NPI) for Marie Mathieu is 1609051648, a Type 1 (individual) record in the CMS NPPES registry.
Where does Marie Mathieu practice?
The practice location on file with NPPES is in Silver Spring, MD. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Threshold Services, Inc. Mental Health Clinic/Center (Including Community Mental Health Center) · Silver Spring, MD NPI 1255379947 Threshold Services, Inc. Mental Health Counselor · Silver Spring, MD NPI 1558446690 Tacie Dejanikus Clinical Social Worker · Silver Spring, MD NPI 1003968439 Rebecca Maguire Clinical Social Worker · Silver Spring, MD NPI 1740464940 Threshold Services Community/Behavioral Health Agency · Silver Spring, MD NPI 1023271624 Antonia Tsutsumi Clinical Social Worker · Silver Spring, MD NPI 1861766610 Cornerstone Montgomery, Inc. Adult Mental Health Clinic/Center · Silver Spring, MD NPI 1174995781 Cornerstone Montgomery, Inc. Community/Behavioral Health Agency · Silver Spring, MD NPI 1619349529
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-08.