Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas John Wessel, PH.D.

Psychologist in Spearfish, SD · enumerated 2005.

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

National Provider Identifier

1598754806

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Douglas John Wessel

Credential PH.D.

Sex Male

Practice address 1445 North Ave, Spearfish, SD, 57783

Phone (605) 644-4170

Enumeration date Oct 19, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 176 (SD) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Douglas Wessel?

Douglas Wessel is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Garry Dunn Diagnostic Radiology Physician · Spearfish, SD NPI 1639151285 Jill Muth Nurse Practitioner · Spearfish, SD NPI 1619940426 Jami Kortan Physician Assistant · Spearfish, SD NPI 1558316422 Spearfish Regional Hospital General Acute Care Hospital · Spearfish, SD NPI 1144276957 Heather Brewer Obstetrics & Gynecology Physician · Spearfish, SD NPI 1134160591 Angela Anderson Pediatrics Physician · Spearfish, SD NPI 1235173659 Warren Golliher Family Medicine Physician · Spearfish, SD NPI 1134159049 Stephen Parys Pediatrics Physician · Spearfish, SD NPI 1720010952

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.