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

Dr. Charles A. Sowieja, D.D.S.

Dentist in Merrill, WI · enumerated 2006.

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

National Provider Identifier

1548284201

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles A. Sowieja

Credential D.D.S.

Sex Male

Practice address Merrill, WI, 54452

Phone (715) 536-7104

Enumeration date Jul 26, 2006

Last updated in NPPES Apr 1, 2014

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 2300 (WI) 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.

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Frequently asked questions

Where does Charles Sowieja practice?

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

What is the NPI number for Charles Sowieja?

The National Provider Identifier (NPI) for Charles Sowieja is 1548284201, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Charles A. Sowieja, D.D.S., S.C. Dentist · Merrill, WI NPI 1730103490 Merrill Smiles LLC General Practice Dentistry · Merrill, WI NPI 1093308769

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-01.