Jason A. Efstathiou, MD
Jason A. Efstathiou is a Radiation Oncology Radiology specialist based in Boston, MA with over 23 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Jason a. Efstathiou, MD has practiced radiology for 23+ years, working in group practice. He graduated from Harvard Medical School in 2003 and has 23+ years of clinical experience. Among his Medicare patients, common conditions include high cholesterol, cancer, and hypertension (per CMS data).
Older · 107dNPPES updated 2026-02-06 · verify NPI on CMS · Verify license at Massachusetts Board of Registration in Medicine
Contact & Location
Practice Location
Massachusetts General Hospital 55 Fruit Street, Boston, MA 02114
How Does This Doctor Compare?
Medicare Patients
386
Unique beneficiaries
Standard volumePrescription Recipients
24
Patients prescribed
Prescriptions Written
43
Total claims
Total Medicare drug cost: $1k
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Cancer, and Hypertension.
Elevated cholesterol or triglycerides that increase heart disease risk
Diseases involving abnormal cell growth with potential to spread to other body parts
High blood pressure — a leading risk factor for heart disease and stroke
Joint inflammation causing pain, swelling, and stiffness
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
Gradual loss of kidney function over time, often linked to diabetes or hypertension
A condition where the body cannot properly regulate blood sugar levels
Excessive worry or fear that interferes with daily life
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$5.9k received from industry
6 transactions reported in 2024 ·High tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Jason a. Efstathiou's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2003
Harvard Medical School
Board certified · Feb 5, 2026
Self-reported via NPPES
23 years in practice
Experienced
A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.
Taxonomy: 2085R0001X
Education & Training
Harvard Medical School (Class of 2003)
Virtual Radiation Oncology Care With Jason a. Efstathiou
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Jason a. Efstathiou for cholesterol management, follow-up consultations, blood pressure monitoring — no travel to Boston required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Jason a. Efstathiou
Dr. Efstathiou is listed as active in the NPI registry with telehealth listed in Boston, MA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (617) 726-1160.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Jason a. Efstathiou
Practice Location
Massachusetts General Hospital 55 Fruit Street, Boston, MA 02114
Mailing Address
Massachusetts General Hospital 55 Fruit Street, Boston, MA 02114
This is a provider directory. Contact the office directly to schedule appointments.
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