Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Darrin Tonsfeldt

Psychologist in Fargo, ND · enumerated 2010 · practices at Clarion Counseling & Consulting, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1437460987

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Registry record

Entity type Individual (Type 1)

Name Darrin Tonsfeldt

Sex Male

Practice address 417 Main Ave Ste 302, Fargo, ND, 58103

Phone (701) 541-5831

Fax (701) 235-6706

Enumeration date Jun 30, 2010

Last updated in NPPES Feb 15, 2019

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 443-5-1-00-337 (ND) Secondary

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 443-5-1-00 (ND) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 3591 (MN) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Darrin Tonsfeldt 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 Darrin Tonsfeldt?

The National Provider Identifier (NPI) for Darrin Tonsfeldt is 1437460987, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Clarion Counseling & Consulting, LLC Mental Health Clinic/Center (Including Community Mental Health Center) · Fargo, ND NPI 1790254191

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-02-15.