Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mary P Long, LCSW
Social Worker in Fargo, ND · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1376640581
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Registry record
Entity type Individual (Type 1)
Name Mary P Long
Credential LCSW
Sex Female
Practice address 510 4th St S, Prairie St Johns, Fargo, ND, 58103
Phone (701) 476-7200
Fax (701) 476-7273
Enumeration date Sep 20, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy.
About the LCSW credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 153K1L0 | Other | MN | BCBS |
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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Mary Long?
Mary Long is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Prairie St Johns Psychiatric Hospital · Fargo, ND NPI 1417901000 Lawana Burtnett Psychiatry Physician · Fargo, ND NPI 1053359943 Rachel Fleissner Child & Adolescent Psychiatry Physician · Fargo, ND NPI 1427084995 Gerard Kottenbrock Addiction (Substance Use Disorder) Counselor · Fargo, ND NPI 1528161189 Glenice Carlson Physician Assistant · Fargo, ND NPI 1134222797 Leslie Mack Professional Counselor · Fargo, ND NPI 1689766750 Martin Tallakson Professional Counselor · Fargo, ND NPI 1598848897 Anneli Bowman Clinical Social Worker · Fargo, ND NPI 1548339591
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.