Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Derek Wallenstein
Social Worker in Fargo, ND · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1689271371
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Registry record
Entity type Individual (Type 1)
Name Derek Wallenstein
Sex Male
Practice address 1635 43rd St S Ste 105, Fargo, ND, 58103
Phone (701) 412-2973
Enumeration date Oct 6, 2020
Last updated in NPPES Sep 11, 2025
Taxonomy & licenses
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 Derek Wallenstein?
Derek Wallenstein 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 → Brandon Germain Behavior Analyst · Fargo, ND NPI 1871930651 Mary Epping Clinical Social Worker · Fargo, ND NPI 1477955144 Kelsey Mehus Clinical Social Worker · Fargo, ND NPI 1487173803 Garrick Leith Behavior Analyst · Fargo, ND NPI 1083172142 Jolynn Lentz Behavior Analyst · Fargo, ND NPI 1093358152 Kelly Johnson Clinical Social Worker · Fargo, ND NPI 1184294670 Daniel Huus Specialist · Fargo, ND NPI 1689327264 Misty Wright Professional Counselor · Fargo, ND NPI 1548908932
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.