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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WALTER JOHN MAZZELLA DDS, MS
NPI 1497733463
Dentist in Washington, DC

Active since January 09, 2006
4400 JENIFER ST NW, #335, WASHINGTON, DC 20015(202) 966-3132(202) 966-0470 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Walter John Mazzella Dds, Ms NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WALTER JOHN MAZZELLA DDS, MS (NPI 1497733463) is an individual dentist in Washington, District Of Columbia, licensed in District Of Columbia (DEN2174) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1497733463
Entity TypeIndividualMale
Primary Taxonomy122300000X
Provider Legal NameWALTER JOHN MAZZELLACredential: DDS, MS
Location Address4400 JENIFER ST NW, #335Washington, DC 20015
Mailing Address4400 Jenifer St Nw, #335Washington, DC 20015 · (202) 966-3132 · Fax (202) 966-0470
Phone(202) 966-3132
Fax(202) 966-0470
Sole ProprietorNo
Enumeration DateJanuary 9, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1497733463 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in DC · DEN2174
Definition
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
4400 JENIFER ST NW, Washington, DC 20015
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Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LISA GEORGE MS OTR/L
Occupational Therapist (Pediatrics)
4400 JENIFER ST NW, SUITE 280
WASHINGTON, DC 20015
District of Columbia (202) 244-8089
ELIZABETH M BAUGHER OT
Occupational Therapist
4400 JENIFER ST NW, 280
WASHINGTON, DC 20015
District of Columbia (202) 244-8089
MS. STACY COYLE PSY.D., LP
Psychologist (Clinical)
4400 JENIFER ST NW, SUITE 280
WASHINGTON, DC 20015
District of Columbia (202) 642-2214
MS. REBECCA PARKS
Occupational Therapist (Pediatrics)
4400 JENIFER ST NW, SUITE #280
WASHINGTON, DC 20015
District of Columbia (202) 244-8089
GEORGETOWN ORAND & MAX SURGERY
Clinic/Center (Oral and Maxillofacial Surgery)
4400 JENIFER ST NW, SUITE 270
WASHINGTON, DC 20015
District of Columbia (202) 364-9400
SENSATIONAL KIDS THERAPY LLC
Occupational Therapist (Pediatrics)
4400 JENIFER ST NW, SUITE 280
WASHINGTON, DC 20015
District of Columbia (202) 244-8089
FIDEL DENTAL GROUP, PLLC
Dentist (Pediatric Dentistry)
4400 JENIFER ST NW, SUITE 335
WASHINGTON, DC 20015
District of Columbia (202) 362-7413

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Walter Mazzella's NPI number?

The NPI number for Walter Mazzella is 1497733463. It was assigned to this individual provider in the NPPES registry on January 9, 2006.

Where is Walter Mazzella located?

Walter Mazzella practices at 4400 Jenifer St NW #335, Washington, DC 20015. The listed phone number is (202) 966-3132.

What is Walter Mazzella's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

When was this NPI record last updated?

The NPPES record for Walter Mazzella was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.