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ZACHARY KASSIR
NPI 1346971546
Internal Medicine in Boston, MA

Active since June 20, 2022PECOS EnrolledAccepts Medicare Assignment
330 BROOKLINE AVE, BOSTON, MA 02215(330) 933-8070 Get Directions Write a Review

NPPES record last updated: August 6, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Zachary Kassir NPPES

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

ZACHARY KASSIR (NPI 1346971546) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (1024498) and active in the NPI registry since June 2022. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and is a graduate of University Of Pittsburgh School Of Medicine (2022).

NPPES Registry Identity

NPI1346971546
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameZACHARY KASSIR
Location Address330 BROOKLINE AVEBoston, MA 02215-5400
Mailing Address45 Marion St Apt 607Brookline, MA 02446-4461 · (330) 933-8070
Phone(330) 933-8070
Sole ProprietorYes
Medical School CMSUniversity Of Pittsburgh School Of MedicineGraduated 2022
Enumeration DateJune 20, 2022
Last NPPES UpdateAugust 6, 2025
NPPES CertifiedAugust 6, 2025
✔ NPI 1346971546 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 1024498
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
330 BROOKLINE AVE, Boston, MA 02215
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Zachary Kassir is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002296464
PECOS Enrollment IDI20250703002111
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Beth Israel Deaconess Medical Center

Acute Care Hospitals · Boston, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220086
Location330 Brookline AvenueBoston, MA 02215 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

BETH ISRAEL DEACONESS MEDICAL CENTER
Chronic Disease Hospital (Children)
330 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 677-4042
DR. BRIAN DANIEL HOBBS MD, MMSC
Internal Medicine
330 BROOKLINE AVE, PULMONARY AND CRITICAL CARE DEPARTMENT
BOSTON, MA 02215
Suffolk County (617) 667-5864
ERICA DOMMASCH MD
Dermatology
330 BROOKLINE AVE, SHAPIRO 2
BOSTON, MA 02215
Suffolk County (617) 667-3753
VAHID KIARAD M.D
Anesthesiology
330 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 667-7000
DR. JONATHAN DAVID THOMAS MD
Internal Medicine (Hematology)
330 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 667-7000
JULIA MARIE BERG MD
Internal Medicine
330 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 667-7000
DR. MICHAEL R GOLDSTEIN PHD
Psychologist (Clinical)
330 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 356-7246
SARA MURDOCK CAHILL MD
Hospitalist
330 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 667-7000

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 Zachary Kassir's NPI number?

The NPI number for Zachary Kassir is 1346971546. It was assigned to this individual provider in the NPPES registry on June 20, 2022.

Where is Zachary Kassir located?

Zachary Kassir practices at 330 Brookline Ave, Boston, MA 02215. The listed phone number is (330) 933-8070.

What is Zachary Kassir's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Zachary Kassir enrolled in Medicare?

Yes. Zachary Kassir is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Zachary Kassir affiliated with any hospitals?

According to CMS data, Zachary Kassir is affiliated with Beth Israel Deaconess Medical Center.

When was this NPI record last updated?

The NPPES record for Zachary Kassir was last updated on August 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.