DR. VASSILIOS JAMES BEZZERIDES M.D., PH.D.
NPI 1194992834
Internal Medicine - Clinical Cardiac Electrophysiology in Boston, MA
About Dr. Vassilios James Bezzerides M.d., Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. VASSILIOS JAMES BEZZERIDES M.D., PH.D. (NPI 1194992834) is an individual clinical cardiac electrophysiology provider in Boston, Massachusetts, licensed in Massachusetts (239833) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS, is affiliated with Boston Children's Hospital, and maintains a secondary practice location in Manchester.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Vassilios James Bezzerides M.d., Ph.d. 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.
Medicare Billing Reassignments
4Medicare enrollment records show Vassilios Bezzerides reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 220 clinicians in this Medicare group
Weymouth, MA 02190
- Reassigned Medicare billing, Massachusetts enrollment
- 671 clinicians in this Medicare group
Hampstead, NH 03841
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 clinicians in this Medicare group
Manchester, NH 03104
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1174176861 (New Hampshire)
- 227 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Boston Children's Hospital
Childrens · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Vassilios Bezzerides's NPI number?
The NPI number for Vassilios Bezzerides is 1194992834. It was assigned to this individual provider in the NPPES registry on May 12, 2008.
Where is Vassilios Bezzerides located?
Vassilios Bezzerides practices at 300 Longwood Ave # Enders12, Boston, MA 02115. The listed phone number is (617) 919-4290.
What is Vassilios Bezzerides's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical Cardiac Electrophysiology, with taxonomy code 207RC0001X.
Is Vassilios Bezzerides enrolled in Medicare?
Yes. Vassilios Bezzerides 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.
Which organizations bill Medicare for Vassilios Bezzerides's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Vassilios Bezzerides reassigns Medicare benefits to 4 organizations: Boston Childrens Heart Foundation Inc (Boston, MA), Coastal Medical Associates (Weymouth, MA), Mary Hitchcock Memorial Hospital (Hampstead, NH) and Dartmouth-Hitchcock Clinic (Manchester, NH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Vassilios Bezzerides's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Vassilios Bezzerides accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Vassilios Bezzerides 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.
Is Vassilios Bezzerides affiliated with any hospitals?
According to CMS data, Vassilios Bezzerides is affiliated with Boston Children's Hospital.
When was this NPI record last updated?
The NPPES record for Vassilios Bezzerides was last updated on January 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Dr. Vassilios James Bezzerides, M.D., PH.D. · NPI 1194992834
Clinical Cardiac Electrophysiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 12, 2008.
## Identity
- **NPI:** 1194992834 (Entity type: Individual)
- **Enumerated:** May 12, 2008
- **Primary specialty:** Internal Medicine - Clinical Cardiac Electrophysiology · taxonomy 207RC0001X
- **State license:** 239833 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE # ENDERS12, Boston, MA 02115-5724
- **Phone:** (617) 919-4290
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Boston Childrens Heart Foundation Inc (NPI 1982680922, Boston, MA); Coastal Medical Associates (NPI 1932175684, Weymouth, MA); Mary Hitchcock Memorial Hospital (NPI 1699584219, Hampstead, NH); Dartmouth-Hitchcock Clinic (NPI 1386697803, Manchester, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2006
## Record status
- **NPPES last updated:** January 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1194992834) · Data from the CMS NPPES public registry.