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Dr. Mary B. Callahan, FACC, DO

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Specializes in: Adult Cardiology

University of New England, College of Osteopathic Medicine

Professional interests include: hypertension (high blood pressure), arrhythmias (irregular heartbeats), women's heart disease, and more.

68 Route 6a
Sandwich, MA 02563

(774) 413-5457

Dr. Mary B. Callahan, FACC, DO is a cardiologist in Sandwich, MA specializing in adult cardiology. She graduated from University of New England, College of Osteopathic Medicine. Dr. Mary B. Callahan, FACC, DO is affiliated with Cape Cod Healthcare.

Office Locations

Cape Cod Healthcare

68 Route 6a
Sandwich, MA 02563

(774) 413-5457

(774) 413-5985

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Some issues Dr. Mary B. Callahan, FACC, DO can help you with:

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. Mary B. Callahan, FACC, DO in 2023

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

Top 5%

By Volume:

cardiac stress testing

cardiac procedures

Doppler echocardiography

echocardiogram

myocardial perfusion SPECT

nuclear scan

stress EKG

ultrasound

In 2023, Dr. Mary B. Callahan, FACC, DO performed more cardiac (heart) stress testing, cardiac procedures, Doppler echocardiography, echocardiogram (echo), myocardial perfusion SPECT, nuclear scan, stress EKG, and ultrasound (sonogram) procedures for Medicare patients than 95% of providers in related specialties within Massachusetts.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2012 were cardiac procedures, stress testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

ambulatory monitoring	20
cardiac procedures	590
doctor visit	831
hospital care	314
inpatient care	314
nuclear scan	69
stress testing	348
ultrasound (sonogram)	222

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2013 were cardiac procedures, hospital care, inpatient care and stress testing.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

cardiac procedures	225
doctor visit	372
hospital care	147
inpatient care	147
nuclear scan	24
stress testing	140
ultrasound (sonogram)	85

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	256
Female	340

**Ethnicity**
Non-Hispanic White	576
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	139
From 75 to 84	224
85 and over	200
Less than 65	33

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2013

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	75
Depression	23
Chronic Kidney Disease	30
Asthma	7
Osteoperosis	10
Atrial Fibrilation	38
Heart Failure	38
Chronic Obstructive Pulmonary Disease	18
Diabetes	32
Dementia	17
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2014 were ultrasound (sonogram) and cardiac procedures.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

cardiac procedures	17
doctor visit	72
ultrasound (sonogram)	17

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	14
Female	26

**Age**
From 65 to 74	16
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2014

Hypertension	75
High Cholesterol	70
Stroke	0
Ischemic Heart Disease	60
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	45
Heart Failure	33
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2015 were cardiac procedures, ultrasound (sonogram) and stress testing.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

cardiac procedures	63
doctor visit	275
stress testing	14
ultrasound (sonogram)	49

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	86
Female	132

**Age**
From 65 to 74	80
From 75 to 84	82
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2015

Hypertension	75
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	57
Depression	28
Chronic Kidney Disease	24
Asthma	11
Osteoperosis	11
Atrial Fibrilation	37
Heart Failure	39
Chronic Obstructive Pulmonary Disease	21
Diabetes	30
Dementia	11
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2016 were cardiac procedures, ultrasound (sonogram), nursing home care and stress testing.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

cardiac procedures	103
doctor visit	416
nursing home care	83
stress testing	18
ultrasound (sonogram)	85

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	88
Female	110

**Age**
From 65 to 74	77
From 75 to 84	63
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2016

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	58
Depression	31
Chronic Kidney Disease	39
Asthma	25
Osteoperosis	10
Atrial Fibrilation	32
Heart Failure	42
Chronic Obstructive Pulmonary Disease	22
Diabetes	30
Dementia	22
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2017 were cardiac procedures, ultrasound (sonogram), stress testing and nursing home care.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

ambulatory monitoring	12
cardiac procedures	132
doctor visit	515
nursing home care	25
stress testing	25
ultrasound (sonogram)	95

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	76
Female	119

**Age**
From 65 to 74	83
From 75 to 84	61
85 and over	36
Less than 65	15

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2017

Hypertension	75
High Cholesterol	73
Stroke	9
Ischemic Heart Disease	50
Depression	29
Chronic Kidney Disease	30
Asthma	9
Osteoperosis	12
Atrial Fibrilation	29
Heart Failure	24
Chronic Obstructive Pulmonary Disease	15
Diabetes	24
Dementia	18
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2018 were cardiac procedures, stress testing, ultrasound (sonogram) and nuclear scan.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

ambulatory monitoring	12
cardiac procedures	227
doctor visit	539
nuclear scan	59
stress testing	120
ultrasound (sonogram)	95

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	65
Female	107

**Ethnicity**
Non-Hispanic White	159
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	84
From 75 to 84	44
85 and over	31
Less than 65	13

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2018

Hypertension	75
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	48
Depression	22
Chronic Kidney Disease	31
Asthma	10
Osteoperosis	15
Atrial Fibrilation	26
Heart Failure	21
Chronic Obstructive Pulmonary Disease	18
Diabetes	22
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2019 were cardiac procedures, ultrasound (sonogram), stress testing and nuclear scan.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

ambulatory monitoring	18
cardiac procedures	257
doctor visit	618
nuclear scan	48
stress testing	105
ultrasound (sonogram)	134

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	82
Female	122

**Ethnicity**
Non-Hispanic White	188
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	91
From 75 to 84	62
85 and over	35
Less than 65	16

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2019

Hypertension	75
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	50
Depression	28
Chronic Kidney Disease	28
Asthma	11
Osteoperosis	13
Atrial Fibrilation	25
Heart Failure	21
Chronic Obstructive Pulmonary Disease	17
Diabetes	24
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2020 were cardiac procedures, ultrasound (sonogram), stress testing and nuclear scan.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

ambulatory monitoring	17
cardiac procedures	235
doctor visit	607
nuclear scan	37
stress testing	92
ultrasound (sonogram)	126

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	80
Female	121

**Ethnicity**
Non-Hispanic White	184
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	91
From 75 to 84	61
85 and over	35
Less than 65	14

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2020

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	55
Depression	26
Chronic Kidney Disease	22
Asthma	10
Osteoperosis	10
Atrial Fibrilation	20
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	21
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2021 were cardiac procedures, ultrasound (sonogram), stress testing and nuclear scan.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

ambulatory monitoring	19
cardiac procedures	238
doctor visit	588
nuclear scan	45
stress testing	102
ultrasound (sonogram)	117

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	83
Female	129

**Ethnicity**
Non-Hispanic White	198
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	91
From 75 to 84	67
85 and over	38
Less than 65	16

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2021

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	58
Depression	20
Chronic Kidney Disease	23
Asthma	9
Osteoperosis	8
Atrial Fibrilation	22
Heart Failure	21
Chronic Obstructive Pulmonary Disease	14
Diabetes	22
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA during 2022 were cardiac procedures, ultrasound (sonogram), stress testing and nuclear scan.

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

cardiac procedures	234
doctor visit	627
nuclear scan	41
stress testing	93
ultrasound (sonogram)	141

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	93
Female	133

**Ethnicity**
Non-Hispanic White	209
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	92
From 75 to 84	78
85 and over	38
Less than 65	18

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2022

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	48
Depression	17
Chronic Kidney Disease	15
Asthma	15
Osteoperosis	14
Atrial Fibrilation	28
Heart Failure	14
Chronic Obstructive Pulmonary Disease	15
Diabetes	21
Dementia	5
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mary B. Callahan, FACC, DO for Medicare patients.

The highest averages for the top procedures that Dr. Mary B. Callahan, FACC, DO treated as a cardiologist in Sandwich, MA were hospital care, inpatient care, cardiac procedures and ultrasound (sonogram).

ambulatory monitoring	16
cardiac procedures	211
doctor visit	496
hospital care	230
inpatient care	230
nuclear scan	46
nursing home care	54
stress testing	105
ultrasound (sonogram)	106

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mary B. Callahan, FACC, DO.

**Gender**
Male	83
Female	121

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	137
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	67
85 and over	37
Less than 65	11
65 to 74	76

Average of Total of Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Mary B. Callahan, FACC, DO treated were hypertension, high cholesterol, ischemic heart disease and atrial fibrilation.

Hypertension	68
High Cholesterol	67
Stroke	8
Ischemic Heart Disease	50
Depression	20
Chronic Kidney Disease	22
Asthma	9
Osteoporosis	9
Heart Failure	24
Chronic Obstructive Pulmonary Disease	14
Diabetes	20
Atrial Fibrillation	27
Dementia	10
Cancer	10

Education & Training

Dr. Mary B. Callahan, FACC, DO graduated from University of New England, College of Osteopathic Medicine. She completed residency at Brown University Affiliated Hospitals. She is certified by the American Board of Internal Medicine, Cardiovascular Disease and has a state license in Massachusetts.

Medical School: University of New England, College of Osteopathic Medicine

Residency: Brown University Affiliated Hospitals

Board Certification: American Board of Internal Medicine, Cardiovascular Disease

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Mary B. Callahan, FACC, DO is associated with these hospitals and organizations:

Cape Cod Healthcare

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Mary B. Callahan, FACC, DO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Janssen Pharmaceuticals, Inc	$2,117 XARELTO $2,104	$13
E.R. Squibb & Sons, L.L.C.	$672 ELIQUIS $591	CAMZYOS $55	$26
Novartis Pharmaceuticals Corporation	$579 ENTRESTO $468	LEQVIO $110
Amgen Inc.	$439 Repatha $425	$14
Boston Scientific Corporation	$196 WATCHMAN $196
Other	$718 PRALUENT $218	Edwards SAPIEN 3 Transcatheter Heart Valve $122	BRILINTA $74	Pradaxa $62	PRALUENT ALIROCUMAB INJECTION $62	Other $179

**Types of Payments**
Food and Beverage	$4,619
Education	$102

Biography

Dr. Mary Callahan is a physician who specializes in adult cardiology. Her clinical interests include arrhythmias (irregular heartbeats), heart failure, and hypertension (high blood pressure). She attended the University of New England, College of Osteopathic Medicine and then went on to complete her residency at a hospital affiliated with Brown University. Dr. Callahan is affiliated with Cape Cod Healthcare.

Select Year:

Dr. Mary B. Callahan, FACC, DO

Office Locations

Some issues Dr. Mary B. Callahan, FACC, DO can help you with:

Noteworthy Medicare Patient Procedures Performed by Dr. Mary B. Callahan, FACC, DO in 2023

By Volume:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Mary B. Callahan, FACC, DO From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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