Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Theresa Matusiewicz Popovich, R.D.H
Dental Hygienist in Bayfield, WI · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1548565419
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Registry record
Entity type Individual (Type 1)
Name Mrs. Theresa Matusiewicz Popovich
Credential R.D.H
Sex Female
Practice address 88455 Pike Rd, Bayfield, WI, 54814
Phone (715) 779-3096
Enumeration date Jan 24, 2011
Last updated in NPPES Jan 24, 2011
Taxonomy & licenses
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Theresa Matusiewicz Popovich?
Theresa Matusiewicz Popovich is registered in NPPES with the primary taxonomy of Dental Hygienist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-24.