Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Walter John Mazzella, DDS, MS
Dentist in Washington, DC · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1497733463
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Walter John Mazzella
Credential DDS, MS
Sex Male
Practice address 4400 Jenifer St Nw, #335, Washington, DC, 20015
Phone (202) 966-3132
Fax (202) 966-0470
Enumeration date Jan 9, 2006
Last updated in NPPES Jul 8, 2007
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 NPI 1497733463 active?
Yes, as of the latest NPPES snapshot, NPI 1497733463 is active (record last updated 2007-07-08).
How do I verify Walter Mazzella's NPI record?
Cross-check NPI 1497733463 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Stacy Coyle Clinical Psychologist · Washington, DC NPI 1538283916 Elizabeth Baugher Occupational Therapist · Washington, DC NPI 1194847301 Georgetown Orand & Max Surgery Oral and Maxillofacial Surgery Clinic/Center · Washington, DC NPI 1679890834 Fidel Dental Group, Pllc Pediatric Dentistry · Washington, DC NPI 1912363573 Lisa George Pediatric Occupational Therapist · Washington, DC NPI 1003275686 Sensational Kids Therapy LLC Pediatric Occupational Therapist · Washington, DC NPI 1902265101 Rebecca Parks Pediatric Occupational Therapist · Washington, DC NPI 1598124760
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.