Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Robert Richard Ziaja, DDS MS
Dentist in Macomb, MI · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1053515155
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Registry record
Entity type Individual (Type 1)
Name Dr. Robert Richard Ziaja
Credential DDS MS
Sex Male
Practice address 48878 Hayes Road, Macomb, MI, 48044
Phone (586) 247-6453
Enumeration date Jun 13, 2007
Last updated in NPPES Jul 8, 2007
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 Robert Ziaja?
Robert Ziaja 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.