Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Magdalena Bronakowska Mertz, DDS
Dentist in Washington, MO · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1205406287
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Registry record
Entity type Individual (Type 1)
Name Magdalena Bronakowska Mertz
Credential DDS
Sex Female
Practice address 1111 E 6th St, Washington, MO, 63090
Phone (636) 239-6328
Enumeration date Jun 30, 2021
Last updated in NPPES Mar 12, 2025
Taxonomy & licenses
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.
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 Magdalena Mertz?
Magdalena Mertz is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Healthwest,LLC Anesthesiology Physician · Washington, MO NPI 1053341867 Aruna Rajagopalan General Practice Dentistry · Washington, MO NPI 1316199862 Four Rivers Anesthesia Anesthesiology Physician · Washington, MO NPI 1487980397 Kaitlyn Bumberry General Practice Dentistry · Washington, MO NPI 1336749118 Casey Aschinger General Practice Dentistry · Washington, MO NPI 1467136366 Benjamin Stieren Dentist · Washington, MO NPI 1568147585 Emily Thornberry Student in an Organized Health Care Education/Training Program · Washington, MO NPI 1407644156
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-12.