Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Brendan Thomas Siefker, DDS
Dentist in Ottoville, OH · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841089836
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Registry record
Entity type Individual (Type 1)
Name Brendan Thomas Siefker
Credential DDS
Sex Male
Practice address 125 W Main St, Ottoville, OH, 45876
Phone (419) 453-3000
Enumeration date May 5, 2025
Last updated in NPPES May 5, 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
What specialty is Brendan Siefker?
Brendan Siefker 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.
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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-05.