Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Harold Blauer, DDS

General Practice Dentistry in Spearfish, SD · enumerated 2021 · practices at William Blauer DDS Pllc.

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

National Provider Identifier

1164097531

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Registry record

Entity type Individual (Type 1)

Name William Harold Blauer

Credential DDS

Sex Male

Practice address 1440 N 10th St, Spearfish, SD, 57783

Phone (605) 642-5767

Enumeration date May 26, 2021

Last updated in NPPES Dec 5, 2022

Taxonomy & licenses

122300000X Dentist Dental Providers · License D-5276 (ID) Secondary

1223G0001X General Practice Dentistry Dental Providers · License D1382 (SD) Primary

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 William Blauer practice?

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

What is the NPI number for William Blauer?

The National Provider Identifier (NPI) for William Blauer is 1164097531, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Glen Sachau General Practice Dentistry · Spearfish, SD NPI 1518912914 William Blauer DDS Pllc General Practice Dentistry · Spearfish, SD NPI 1396454179

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-05.