Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas C Mueller, OD

Optometrist in Willmar, MN · enumerated 2006.

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

National Provider Identifier

1285602888

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas C Mueller

Credential OD

Sex Male

Practice address 101 Willmar Ave Sw, Willmar, MN, 56201

Phone (320) 231-5000

Fax (320) 231-5067

Enumeration date Mar 9, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 1589 (MN) 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

What is the NPI number for Thomas Mueller?

The National Provider Identifier (NPI) for Thomas Mueller is 1285602888, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Mueller practice?

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

Other providers at this practice address

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