Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Dorothy Mae Mastrud, LCSW
Social Worker in Fargo, ND · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1194917831
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Registry record
Entity type Individual (Type 1)
Name Mrs. Dorothy Mae Mastrud
Credential LCSW
Sex Female
Practice address 509 25th Ave North, Fargo, ND, 58102
Phone (701) 232-6224
Enumeration date Aug 16, 2007
Last updated in NPPES Aug 16, 2007
Taxonomy & licenses
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
Where does Dorothy Mastrud practice?
The practice location on file with NPPES is in Fargo, ND. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Dorothy Mastrud?
The National Provider Identifier (NPI) for Dorothy Mastrud is 1194917831, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-16.