Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John J Muzio III, DDS
Dentist in Hayward, CA · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598102303
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Registry record
Entity type Individual (Type 1)
Name John J Muzio III
Credential DDS
Sex Male
Practice address 771 Southland Dr, Hayward, CA, 94545
Phone (510) 785-7010
Fax (510) 783-4357
Enumeration date Jun 3, 2013
Last updated in NPPES Jun 3, 2013
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
Where does John Muzio practice?
The practice location on file with NPPES is in Hayward, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Muzio?
The National Provider Identifier (NPI) for John Muzio is 1598102303, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Charles Giang General Practice Dentistry · Hayward, CA NPI 1407962822 John J. Muzio, III, D.D.S. General Practice Dentistry · Hayward, CA NPI 1205052412 Charles C, Giang, Dmd, Inc. Dentist · Hayward, CA NPI 1396095576 Tru Tran General Practice Dentistry · Hayward, CA NPI 1194183616 Matthew Giang General Practice Dentistry · Hayward, CA NPI 1639522113
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-03.