Has Ioannis Mastoris, MD received payments from drug or device companies?

Yes. Drug and device makers reported $2,395 in general payments to Ioannis Mastoris, MD across 24 transactions between 2019–2025. Most Open Payments records nationally are meals worth under $20; a reported payment is not evidence of wrongdoing.

Does a payment mean Ioannis Mastoris, MD did something wrong?

No. Federal law requires drug and device makers to report almost every transfer of value to a physician, including a $14 sandwich at a lunch presentation. Consulting fees, research funding and royalties to device inventors are ordinary, legal parts of medicine. This site reports what was disclosed; it makes no allegation.

Where does this information about Ioannis Mastoris, MD come from?

The U.S. Centers for Medicare & Medicaid Services. Payments come from Open Payments, published under the Physician Payments Sunshine Act. Billing and prescribing figures come from the Medicare Physician & Other Practitioners and Part D Prescriber public use files for 2024.

Ioannis Mastoris, MD

Advanced Heart Failure and Transplant Cardiology · Boston, MANPI 1124403209

Payments from drug & device makers

What this record shows

This record is dominated by food and beverage: $1,949 of the $2,395 with a category attached, or 81.4%. 6 manufacturers reported payments, led by Abbott at 56.3% of the total. That places this record below the midpoint for advanced heart failure and transplant cardiology clinicians in MA, where the typical reported total is $6,286.

$2,395in general payments, 2019–2025

Across 24 payments — averaging $99.80 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Abbott$1K
Impulse Dynamics (USA) Inc.$655
Endotronix, Inc.$294
Abiomed$40
E.r. Squibb & Sons, L.L.C.$34
Medtronic$23

$30,996in research payments, 2019–2025

Across 4 payments — averaging $7749.05 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.

Bayer$31K

What the payments were for

Food & beverage$1,94981%
Education$44619%

Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.

General payments by program year

Who reported the general payments

Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.

Company	Payments	Total
Abbott	14	$1,349
Impulse Dynamics (USA) Inc.	6	$655
Endotronix, Inc.	1	$294
Abiomed	1	$40
E.r. Squibb & Sons, L.L.C.	1	$34
Medtronic	1	$23

What the payments were tied to

Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.

OPTIMIZER$1,053
CORDELLA PULOMONARY ARTERY PRESSURE SENSOR$294
CARDIOMEMS$290
ENSITE PRECISION$231
HeartMate 3 Left Ventricular Dev$215
THORATEC HEARTMATE 3 LVAS IMPLANT KIT$120
Quadra Assura CRT Defibrillator$120
ViewFlex Xtra ICE Catheter$114

How this compares

$2,395 in reported general payments places this provider in the 35th percentile of 35 advanced heart failure and transplant cardiology providers in Massachusetts.

See all advanced heart failure and transplant cardiology providers in Massachusetts →

Medicare billing

Part B allowed, 2024

$151,379

Medicare patients

276

Services billed

1,298

What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.

Most prescribed under Part D

Drug	Claims	Cost to plans & patients
VyndaqelTafamidis Meglumine	12	$273,182
EntrestoSacubitril/Valsartan	148	$203,010
JardianceEmpagliflozin	107	$123,646
EliquisApixaban	45	$72,124
FarxigaDapagliflozin Propanediol	45	$60,972
Eplerenone	35	$3,004
Metoprolol Succinate	148	$2,835
Spironolactone	117	$1,089
Torsemide	28	$758
Atorvastatin Calcium	48	$729
Rosuvastatin Calcium	33	$699
Furosemide	51	$254
ClopidogrelClopidogrel Bisulfate	19	$183
Warfarin Sodium	11	$164
Amlodipine Besylate	12	$31

Paid to pharmacies, not to this prescriber.

Other advanced heart failure and transplant cardiology in Boston

Pablo Quintero PinzonBoston$137K
Daniel ZlotoffBoston$96K
Christina Vander PluymBoston$55K
Monica AhluwaliaBoston$39K
Stephanie MooreBoston$30K
David DenofrioBoston$18K
Robb KociolBoston$12K
Marwa SabeBoston$12K
Edward GrandinBoston$8K
Kemar BrownBoston$7K

See the full list for Massachusetts →

Where these figures come from

Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
Identity: NPPES NPI Registry, July 2026.

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