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

LEON B BASTAJIAN DDS
NPI 1639155831
Dentist in Watertown, MA

Q: What is Leon Bastajian's NPI number?

The NPI number for Leon Bastajian is 1639155831. It was assigned to this individual provider in the NPPES registry on December 20, 2005.

Q: What is Leon Bastajian's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Leon Bastajian 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 43 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.

Active since December 20, 2005

521 MOUNT AUBURN ST, STE 207, WATERTOWN, MA 02472(617) 926-1146 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

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About Leon B Bastajian Dds NPPES

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

LEON B BASTAJIAN DDS (NPI 1639155831) is an individual dentist in Watertown, Massachusetts, licensed in Massachusetts (14467) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1639155831

Entity TypeIndividualMale

Primary Taxonomy122300000X

Provider Legal NameLEON B BASTAJIANCredential: DDS

Location Address521 MOUNT AUBURN ST, STE 207Watertown, MA 02472-4159

Mailing Address521 Mount Auburn St, Ste 207Watertown, MA 02472-4159 · (617) 926-1146

Phone(617) 926-1146

Sole ProprietorNo

Enumeration DateDecember 20, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1639155831 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers

Taxonomy Code122300000X

License✔ Licensed in MA · 14467

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.

521 MOUNT AUBURN ST, Watertown, MA 02472

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, BEST Life and more.Insurance ›

Other Providers at the Same Location NPPES 20

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

MR. JOEL W TEEVEN MSW, LICSW

Social Worker (Clinical)

521 MOUNT AUBURN ST, SUITE 109
WATERTOWN, MA 02472

Middlesex County (781) 893-8168

CHERYL E EHRENKRANZ PT

Physical Therapist

521 MOUNT AUBURN ST, SUITE 205
WATERTOWN, MA 02472

Middlesex County (617) 923-0757

ISABELLE OBERT PT, DPT

Physical Therapist

521 MOUNT AUBURN ST
WATERTOWN, MA 02472

Middlesex County (617) 923-0757

SUSAN M LATTANZI PT

Physical Therapist

521 MOUNT AUBURN ST, SUITE 205
WATERTOWN, MA 02472

Middlesex County (617) 923-0757

DR. LARRY A WEINRAUCH MD

Internal Medicine (Cardiovascular Disease)

521 MOUNT AUBURN ST, SUITE 204
WATERTOWN, MA 02472

Middlesex County (617) 923-0800

DR. JANIS ANN WAGNER PH.D

Psychologist

521 MOUNT AUBURN ST, SUITE 107-109
WATERTOWN, MA 02472

Middlesex County (617) 416-7815

PAUL M FERGUS MD

Internal Medicine

521 MOUNT AUBURN ST, SUITE 101
WATERTOWN, MA 02472

Middlesex County (617) 924-6484

DR. LESLIE MACDONALD MD

Obstetrics & Gynecology

521 MOUNT AUBURN ST, STE 103
WATERTOWN, MA 02472

Middlesex County (617) 926-2414

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 Leon Bastajian's NPI number?

The NPI number for Leon Bastajian is 1639155831. It was assigned to this individual provider in the NPPES registry on December 20, 2005.

Where is Leon Bastajian located?

Leon Bastajian practices at 521 Mount Auburn St Ste 207, Watertown, MA 02472. The listed phone number is (617) 926-1146.

What is Leon Bastajian's specialty?

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

What insurance does Leon Bastajian accept?

Health plans from Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, BEST Life, Blue Cross and Blue Shield of Alabama and Blue Cross and Blue Shield of Montana and 6 other insurers list Leon Bastajian as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Leon Bastajian 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 43 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.