NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Thomas Harry Olson, M.D.

Family Medicine Physician in Vermillion, SD · enumerated 2005.

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

National Provider Identifier

1134127087

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Registry record

Entity type Individual (Type 1)
Name Thomas Harry Olson
Credential M.D.
Sex Male
Practice address Vermillion, SD, 57069
Phone (605) 624-5666
Fax (605) 624-2984
Enumeration date Jul 13, 2005
Last updated in NPPES May 9, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 2237 (SD) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
5601013 Medicaid SD -
0001211 Other SD BCBS PROVIDER NUMBER

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 Thomas Olson practice?
The practice location on file with NPPES is in Vermillion, SD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Thomas Olson?
The National Provider Identifier (NPI) for Thomas Olson is 1134127087, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-09.