Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen Robert Thies, DDS

Dentist in Marshalltown, IA · enumerated 2006.

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

National Provider Identifier

1588769939

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Robert Thies

Credential DDS

Sex Male

Practice address 112 E Linn St, Marshalltown, IA, 50158

Phone (641) 844-6230

Fax (641) 844-6235

Enumeration date Sep 13, 2006

Last updated in NPPES Jun 28, 2021

Taxonomy & licenses

122300000X Dentist Dental Providers · License 6242 (IA) 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 Stephen Thies practice?

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

What is the NPI number for Stephen Thies?

The National Provider Identifier (NPI) for Stephen Thies is 1588769939, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-28.