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

Dr. Steven Lee Tollefson, DDS

Dentist in Lanse, MI · enumerated 2006.

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

National Provider Identifier

1407887417

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Steven Lee Tollefson

Credential DDS

Sex Male

Practice address Lanse, MI, 49946

Phone (906) 524-6960

Fax (906) 524-6960

Enumeration date Jul 6, 2006

Last updated in NPPES Jul 9, 2007

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 014154 (MI) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
014154	Other	MI	STATE LICENSE NUMBER
1768046	Medicaid	MI	-

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 Steven Tollefson practice?

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

What is the NPI number for Steven Tollefson?

The National Provider Identifier (NPI) for Steven Tollefson is 1407887417, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.