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Dr. Ildefonso J. Mas JR., MD

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Specializes in: Adult Cardiology

Professional interests include: ambulatory event monitoring (AEM), ambulatory cardiac monitoring, transthoracic echocardiography (TTE), and more.

11501 Sw 40th Street
Miami, FL 33165

(305) 642-5366

Dr. Ildefonso J. Mas JR., MD is a cardiologist in Miami, FL specializing in adult cardiology. Dr. Ildefonso J. Mas JR., MD is affiliated with HCA Florida Healthcare, Leon Medical Centers, MAS MEDICAL GROUP INC and MAS CARDIOLOGY GROUP INC.

Office Locations

Leon Medical Centers

11501 Sw 40th Street
Miami, FL 33165

(305) 642-5366

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3181 Coral Way 5th Floor
Miami, FL 33145

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Some issues Dr. Ildefonso J. Mas JR., MD can help you with:

Heart Attack

A heart attack is a serious medical event that happens when the blood supplying oxygen to the heart is cut off, usually because of a blockage in an artery. This results in damage or death of part of the heart muscle. The heart can heal, but like any part of the body that was injured it leaves a scar. This scar tissue does not contract effectively, so the ability of the heart to pump is lowered after a heart attack.

A heart attack, sometimes called a myocardial infarction, can happen without warning. However there are certain factors that raise the risk of heart attack. Some of these are:

Age
Gender (most heart attack sufferers are male)
A family history of heart attacks
Smoking
Obesity
High cholesterol
High blood pressure
Diabetes
Unhealthy lifestyle choices (lack of exercise, poor diet, too much alcohol or stress)

Heart attacks typically feel like pain or pressure in the chest that can radiate out to the back, arm, or jaw. Some other symptoms can include fatigue or weakness, shortness of breath, sweating, and nausea.

Treatment aims to increase blood flow to the heart muscle by opening up blocked blood vessels. Medications are sometimes used to dissolve clots in the arteries. Aspirin and other medications such as Plavix can thin the blood and make clots less likely to form. Dilators can widen blood vessels to make room for more blood to flow. Doctors can also use a procedure called catheterization to look at the blood vessels around the heart directly, place stents, or widen vessels using angioplasty. In extreme cases bypass surgery can be used to help blood flow better. After recovery, it is important to lead a healthy lifestyle and take any prescribed medications in order to protect the heart.

Heart Problems

The heart is one of the most important organs in the body. This smooth muscle expands and contracts rhythmically an entire lifetime, pumping blood to the lungs and then to every other cell in the body. When heart problems occur, it becomes difficult for the body to get the nutrients and oxygen it needs via the blood. So while there are a variety of illnesses and disorders that affect the heart, most of them cause weakness, exhaustion and shortness of breath. The most common heart conditions include heart disease, angina, arrhythmia, and valve disorders.

Heart disease is the leading cause of death in the United States for both men and women. This includes coronary artery disease, heart attacks, congestive heart failure, and congenital heart disease. Some conditions, such as genetics, cannot be controlled. But there are many other things one can do to lower their risk for heart disease. Controlling high blood pressure and cholesterol levels, reducing or stopping smoking, exercising more and losing weight if needed, and eating a diet low in sodium can all protect the heart.

Angina is a squeezing type of chest pain that happens when the muscles around the heart don't get enough oxygen. It can be regular or infrequent. Usually, angina is caused by coronary heart disease. However, not all chest pain is angina. Chest pain can also be caused by a lung infection or panic attack, for example, so it is important to have any sudden pain checked.

Arrhythmia is the word for when the heart beats too fast, too slow, or irregularly with skipped beats. It can feel frightening, and depending on the type it can be dangerous, but in most cases arrhythmia is not serious and can be treated. It is very common, especially in older adults.

Heart valve problems can happen in any one of the the heart's four valves that keep blood flowing where it needs to go. Babies can be born with problems in their heart valves, or valves can be damaged by infections. The valves can stiffen and become less mobile, or they can stop closing properly and 'leak' when the heart beats. Valve problems can usually be repaired surgically.

Noteworthy Medicare Patient Procedures Performed by Dr. Ildefonso J. Mas JR., MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 25%

By Affordability:

cardiac imaging

In 2012, Dr. Ildefonso J. Mas JR., MD had a list price for cardiac imaging that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Florida. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2012 were cardiac procedures, ultrasound (sonogram), stress testing and ambulatory monitoring.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

ambulatory monitoring	18
cardiac procedures	202
doctor visit	371
preventive care	13
stress testing	40
ultrasound (sonogram)	144
vaccines	13

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2013 were cardiac procedures, ultrasound (sonogram), stress testing and ambulatory monitoring.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

ambulatory monitoring	13
cardiac procedures	145
doctor visit	329
stress testing	31
ultrasound (sonogram)	101

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	86
Female	118

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	182
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	54
From 75 to 84	87
85 and over	50
Less than 65	13

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2013

Hypertension	75
High Cholesterol	54
Stroke	6
Ischemic Heart Disease	75
Depression	31
Chronic Kidney Disease	17
Asthma	13
Osteoperosis	36
Atrial Fibrilation	11
Heart Failure	32
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Dementia	22
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2014 were cardiac procedures, ultrasound (sonogram) and stress testing.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	127
doctor visit	311
stress testing	22
ultrasound (sonogram)	105

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	94
Female	98

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	167
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	82
85 and over	44
Less than 65	14

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2014

Hypertension	75
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	75
Depression	31
Chronic Kidney Disease	21
Asthma	15
Osteoperosis	13
Atrial Fibrilation	13
Heart Failure	33
Chronic Obstructive Pulmonary Disease	22
Diabetes	42
Dementia	20
Cancer	18

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2015 were ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	20
doctor visit	85
ultrasound (sonogram)	20

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	50
Female	72

**Age**
From 65 to 74	0
From 75 to 84	42
85 and over	44
Less than 65	0

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2015

Hypertension	75
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	75
Depression	31
Chronic Kidney Disease	30
Asthma	25
Osteoperosis	18
Atrial Fibrilation	0
Heart Failure	30
Chronic Obstructive Pulmonary Disease	28
Diabetes	46
Dementia	26
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2016 were cardiac procedures, ultrasound (sonogram) and stress testing.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	178
doctor visit	232
stress testing	42
ultrasound (sonogram)	136

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	117
Female	109

**Ethnicity**
Non-Hispanic White	54
Black	0
Hispanic	160
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	74
From 75 to 84	74
85 and over	63
Less than 65	15

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2016

Hypertension	75
High Cholesterol	66
Stroke	5
Ischemic Heart Disease	75
Depression	24
Chronic Kidney Disease	29
Asthma	26
Osteoperosis	12
Atrial Fibrilation	15
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	46
Dementia	17
Cancer	17

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2017 were cardiac procedures, ultrasound (sonogram) and stress testing.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	154
doctor visit	232
stress testing	33
ultrasound (sonogram)	121

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	95
Female	88

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	129
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	58
From 75 to 84	63
85 and over	48
Less than 65	14

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2017

Hypertension	75
High Cholesterol	69
Stroke	7
Ischemic Heart Disease	75
Depression	25
Chronic Kidney Disease	40
Asthma	7
Osteoperosis	7
Atrial Fibrilation	23
Heart Failure	38
Chronic Obstructive Pulmonary Disease	22
Diabetes	62
Dementia	19
Cancer	18

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2018 were cardiac procedures, ultrasound (sonogram) and stress testing.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	124
doctor visit	189
stress testing	27
ultrasound (sonogram)	97

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	78
Female	80

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	110
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	59
From 75 to 84	52
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2018

Hypertension	75
High Cholesterol	74
Stroke	0
Ischemic Heart Disease	72
Depression	24
Chronic Kidney Disease	36
Asthma	9
Osteoperosis	8
Atrial Fibrilation	25
Heart Failure	34
Chronic Obstructive Pulmonary Disease	23
Diabetes	64
Dementia	15
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2019 were cardiac procedures, ultrasound (sonogram), stress testing and ambulatory monitoring.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

ambulatory monitoring	13
cardiac procedures	120
doctor visit	152
stress testing	13
ultrasound (sonogram)	94

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	70
Female	66

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	90
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	55
From 75 to 84	49
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2019

Hypertension	75
High Cholesterol	74
Stroke	0
Ischemic Heart Disease	65
Depression	25
Chronic Kidney Disease	42
Asthma	10
Osteoperosis	9
Atrial Fibrilation	26
Heart Failure	20
Chronic Obstructive Pulmonary Disease	18
Diabetes	64
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2020 were ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	57
doctor visit	53
ultrasound (sonogram)	57

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	42
Female	47

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	64
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	28
From 75 to 84	34
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2020

Hypertension	75
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	62
Depression	26
Chronic Kidney Disease	33
Asthma	0
Osteoperosis	0
Atrial Fibrilation	17
Heart Failure	26
Chronic Obstructive Pulmonary Disease	17
Diabetes	39
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2021 were ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	57
doctor visit	76
ultrasound (sonogram)	57

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	38
Female	35

**Ethnicity**
Non-Hispanic White	24
Black	0
Hispanic	49
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	18
From 75 to 84	37
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2021

Hypertension	75
High Cholesterol	74
Stroke	0
Ischemic Heart Disease	56
Depression	27
Chronic Kidney Disease	38
Asthma	0
Osteoperosis	0
Atrial Fibrilation	18
Heart Failure	36
Chronic Obstructive Pulmonary Disease	0
Diabetes	47
Dementia	0
Cancer	18

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL during 2022 were ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

cardiac procedures	51
doctor visit	37
ultrasound (sonogram)	51

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	36
Female	41

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	56
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	30
From 75 to 84	28
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD in 2022

Hypertension	75
High Cholesterol	71
Stroke	0
Ischemic Heart Disease	44
Depression	23
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	0
Atrial Fibrilation	27
Heart Failure	25
Chronic Obstructive Pulmonary Disease	19
Diabetes	45
Dementia	0
Cancer	22

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Ildefonso J. Mas JR., MD for Medicare patients.

The highest averages for the top procedures that Dr. Ildefonso J. Mas JR., MD treated as a cardiologist in Miami, FL were cardiac procedures, ultrasound (sonogram), stress testing and ambulatory monitoring.

ambulatory monitoring	14
cardiac procedures	112
doctor visit	187
preventive care	13
stress testing	29
ultrasound (sonogram)	89
vaccines	13

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Ildefonso J. Mas JR., MD.

**Gender**
Male	64
Female	68

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	7
Native American / Alaskan Native	0
Hispanic	91
Other	0

**Age**
75 to 84	49
85 and over	22
Less than 65	5
65 to 74	38

Average of Total of Conditions of Medicare patients treated by Dr. Ildefonso J. Mas JR., MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Ildefonso J. Mas JR., MD treated were hypertension, ischemic heart disease, high cholesterol and diabetes.

Hypertension	68
High Cholesterol	60
Stroke	1
Ischemic Heart Disease	61
Depression	24
Chronic Kidney Disease	27
Asthma	9
Osteoporosis	9
Heart Failure	27
Chronic Obstructive Pulmonary Disease	17
Diabetes	44
Atrial Fibrillation	15
Dementia	13
Cancer	13

Education & Training

He completed residency at Georgetown University Hospital. He has a state license in Florida.

Residency: Georgetown University Hospital

Licensed In: Florida

Affiliations & Hospitals

Dr. Ildefonso J. Mas JR., MD is associated with these hospitals and organizations:

HCA Florida Healthcare

Leon Medical Centers

MAS MEDICAL GROUP INC

MAS CARDIOLOGY GROUP INC

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General Payments

These charts describe general payments received by Dr. Ildefonso J. Mas JR., MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Cardiovascular Systems Inc.	$1,502 Atherectomy Device $1,498	Coronary Orbital Atherectomy System $5
Medtronic Vascular, Inc.	$1,406 STENTS $441	Resolute $376	Cardiac Resynchronization Therapy - CRT $184	Viva $170	Micra $152	Other $83
Medtronic, Inc.	$736 Resolute $277	COBALT DR MRI SURESCAN $142	RESOLUTE ONYX $129	Advisa $103	Telescope $52	Other $32
Boehringer Ingelheim Pharmaceuticals, Inc.	$348 Pradaxa $348
Boston Scientific Corporation	$170 WATCHMAN Access System $170
Other	$597 Pounce Venous Thrombectomy System $96	Cardiovascular $89	BRILINTA $73	ANGIOSCULPT $53	NON-PRODUCT $42	Other $244

**Types of Payments**
Food and Beverage	$3,289
Travel and Lodging	$1,401
Education	$68

Biography

Dr. Ildefonso Mas is a specialist in adult cardiology. Dr. Mas is conversant in Spanish. His clinical interests include myocarditis, heart attack, and pericarditis. His hospital/clinic affiliations include Leon Medical Centers and HCA Florida Healthcare. For his professional training, Dr. Mas completed a residency program at Georgetown University Hospital.