Ioannis Mastoris, MD
Advanced Heart Failure and Transplant Cardiology
Ioannis Mastoris is an Advanced Heart Failure and Transplant Cardiology specialist based in Boston, MA with over 15 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: CARDIOVASCULAR DISEASE (CARDIOLOGY)
Ioannis Mastoris, MD specializes in internal medicine, serving patients in Boston, MA in group practice. He has been practicing since 2015 — over 15 years. He regularly sees Medicare patients with hypertension, high cholesterol, and heart failure (per CMS claims data).
Older · 1121dNPPES updated 2023-05-01 · verify NPI on CMS · Verify license at Massachusetts Board of Registration in Medicine
How Does This Doctor Compare?
Generic Rx
↑ Higher = better67.6%
Massachusetts avg: 81.9 · US avg: 82.8
⚠ Lower than most doctors nationally(-15.2 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
221
Unique beneficiaries
Standard volumePrescription Recipients
112
Patients prescribed
Prescriptions Written
543
Total claims
Total Medicare drug cost: $683k
Percentile rankings compared against 1,606 reporting peers in Massachusetts.
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 Hypertension, High Cholesterol, and Heart Failure.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
The heart cannot pump blood efficiently enough to meet the body's needs
US avg: 22.5%↑ More patients than average (+53%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+42%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+40%) — a focus area for this doctor
An irregular, often rapid heartbeat that increases the risk of stroke
US avg: 22%↑ More patients than average (+40%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+17%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$579 received from industry
5 transactions reported in 2024 ·Moderate 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 Ioannis Mastoris's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Apr 30, 2023
Self-reported via NPPES
15 years in practice
Experienced
Specialists in Advanced Heart Failure and Transplant Cardiology would participate in the inpatient and outpatient management of patients with advanced heart failure across the spectrum from consideration for high-risk cardiac surgery, cardiac transplantation, or mechanical circulatory support, to pre-and post-operative evaluation and management of patients with cardiac transplants and mechanical support devices, and end-of-life care for patients with end-stage heart failure.
Taxonomy: 207RA0001X
Mailing address
Po Box 9142, Charlestown, MA 02129-9142
Differs from practice location
Virtual Advanced Heart Failure and Transplant Cardiology Care With Ioannis Mastoris
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Ioannis Mastoris for blood pressure monitoring, cholesterol management, heart failure 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 Ioannis Mastoris
Dr. Mastoris 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) 643-7972.
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 Ioannis Mastoris
Practice Location
55 Fruit St Grb 800, Boston, MA 02114-2696
Mailing Address
Po Box 9142, Charlestown, MA 02129-9142
This is a provider directory. Contact the office directly to schedule appointments.
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