Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew Thomas Blaseg, OD

Optometrist in Pierre, SD · enumerated 2022.

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

National Provider Identifier

1740912039

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew Thomas Blaseg

Credential OD

Sex Male

Practice address 640 E Sioux Ave Ste 3, Pierre, SD, 57501

Phone (605) 224-6128

Fax (605) 224-8446

Enumeration date Jun 27, 2022

Last updated in NPPES Jun 27, 2022

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 779 (SD) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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

Where does Matthew Blaseg practice?

The practice location on file with NPPES is in Pierre, SD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Matthew Blaseg?

The National Provider Identifier (NPI) for Matthew Blaseg is 1740912039, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-27.