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Dr. Seth McClennen, MD

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Specializes in: Cardiac Electrophysiology (Heart Rhythm) and Adult Cardiology

Dartmouth Medical School (1997)

Professional interests include: pain, arrhythmias (irregular heartbeats), pneumonia, and more.

70 FRANCIS STREET
BOSTON, MA 02115

(857) 307-4000

Dr. Seth McClennen, MD is a cardiac electrophysiologist in BOSTON, MA specializing in cardiac electrophysiology (heart rhythm) and adult cardiology. He graduated from Dartmouth Medical School in 1997 and has 29 years of experience. Dr. Seth McClennen, MD is affiliated with South Shore Health.

Office Locations

70 FRANCIS STREET
BOSTON, MA 02115

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541 Main Street
Weymouth, MA 02190

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Some issues Dr. Seth McClennen, MD 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. Seth McClennen, MD in 2023

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

Top 5%

By Volume:

blood draw

phlebotomy for lab tests

prothrombin time test

In 2023, Dr. Seth McClennen, MD performed more blood draw, phlebotomy for lab tests, and prothrombin time (PT) test procedures for Medicare patients than 95% of providers in related specialties within Massachusetts.

Top 10%

By Volume:

cardiac device implantation

permanent transvenous pacemaker implantation

permanent transvenous pacemaker replacement

In 2023, Dr. Seth McClennen, MD performed more cardiac device implantation, permanent transvenous pacemaker implantation, and permanent transvenous pacemaker replacement procedures for Medicare patients than 90% of providers in related specialties within Massachusetts.

Top 25%

By Volume:

blood tests

cardioversion

elective external cardioversion

emergency room care

inpatient hospital care

minimally invasive procedures

In 2012, Dr. Seth McClennen, MD performed more blood tests, cardioversion, elective external cardioversion, emergency room (ER) care, inpatient hospital care (for patient admitted to hospital), and minimally invasive procedures procedures for Medicare patients than 75% of providers in related specialties within Massachusetts.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2012 were lab tests, hospital care, inpatient care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	48
ambulatory monitoring	64
cardiac procedures	231
cardioversion	22
catheterization	48
diagnostic procedures	55
doctor visit	2608
hospital care	510
implant surgery	52
implantable cardioverter-defibrillator (ICD) replacement	14
inpatient care	486
lab tests	857
minimally invasive procedures	148
outpatient care	24
stress testing	12

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2013 were lab tests, hospital care, inpatient care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	42
ambulatory monitoring	62
cardiac procedures	214
cardioversion	23
catheterization	42
diagnostic procedures	42
doctor visit	2708
hospital care	444
implant surgery	81
implantable cardioverter-defibrillator (ICD) replacement	31
inpatient care	411
lab tests	886
minimally invasive procedures	178
outpatient care	33
stress testing	16
ultrasound (sonogram)	13

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1052
Female	1115

**Ethnicity**
Non-Hispanic White	2098
Black	20
Hispanic	0
Asian	0
Other	26
Native American	0

**Age**
From 65 to 74	627
From 75 to 84	771
85 and over	619
Less than 65	150

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2013

Hypertension	75
High Cholesterol	65
Stroke	11
Ischemic Heart Disease	58
Depression	30
Chronic Kidney Disease	39
Asthma	9
Osteoperosis	8
Atrial Fibrilation	47
Heart Failure	46
Chronic Obstructive Pulmonary Disease	26
Diabetes	33
Dementia	22
Cancer	17

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2014 were lab tests, hospital care, inpatient care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	58
ambulatory monitoring	53
cardiac procedures	243
cardioversion	16
catheterization	58
diagnostic procedures	47
doctor visit	2787
hospital care	601
implant surgery	79
implantable cardioverter-defibrillator (ICD) replacement	35
inpatient care	566
lab tests	822
minimally invasive procedures	213
outpatient care	35
stress testing	35
ultrasound (sonogram)	18

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1034
Female	1070

**Ethnicity**
Non-Hispanic White	2040
Black	14
Hispanic	13
Asian	0
Other	26
Native American	0

**Age**
From 65 to 74	582
From 75 to 84	759
85 and over	596
Less than 65	167

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2014

Hypertension	75
High Cholesterol	61
Stroke	8
Ischemic Heart Disease	56
Depression	28
Chronic Kidney Disease	41
Asthma	8
Osteoperosis	9
Atrial Fibrilation	49
Heart Failure	47
Chronic Obstructive Pulmonary Disease	24
Diabetes	32
Dementia	19
Cancer	17

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2015 were lab tests, hospital care, inpatient care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	32
ambulatory monitoring	54
cardiac procedures	206
cardioversion	20
catheterization	32
diagnostic procedures	32
doctor visit	2867
hospital care	655
implant surgery	65
implantable cardioverter-defibrillator (ICD) replacement	21
inpatient care	622
lab tests	867
minimally invasive procedures	129
outpatient care	33
stress testing	55

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	2338
Female	2348

**Ethnicity**
Non-Hispanic White	4518
Black	48
Hispanic	0
Asian	0
Other	70
Native American	0

**Age**
From 65 to 74	1392
From 75 to 84	1658
85 and over	1284
Less than 65	352

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2015

Hypertension	75
High Cholesterol	64
Stroke	10
Ischemic Heart Disease	56
Depression	30
Chronic Kidney Disease	43
Asthma	17
Osteoperosis	9
Atrial Fibrilation	48
Heart Failure	47
Chronic Obstructive Pulmonary Disease	25
Diabetes	32
Dementia	21
Cancer	16

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2016 were lab tests, hospital care, inpatient care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	63
ambulatory monitoring	55
cardiac procedures	253
cardioversion	24
catheterization	63
diagnostic procedures	64
doctor visit	2899
hospital care	511
implant surgery	64
implantable cardioverter-defibrillator (ICD) replacement	22
inpatient care	480
lab tests	929
minimally invasive procedures	205
outpatient care	31
stress testing	39
ultrasound (sonogram)	15

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1161
Female	1152

**Ethnicity**
Non-Hispanic White	2218
Black	26
Hispanic	0
Asian	0
Other	46
Native American	0

**Age**
From 65 to 74	712
From 75 to 84	825
85 and over	605
Less than 65	171

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2016

Hypertension	75
High Cholesterol	63
Stroke	10
Ischemic Heart Disease	55
Depression	28
Chronic Kidney Disease	42
Asthma	26
Osteoperosis	9
Atrial Fibrilation	45
Heart Failure	45
Chronic Obstructive Pulmonary Disease	24
Diabetes	31
Dementia	23
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2017 were lab tests, inpatient care, hospital care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	43
ambulatory monitoring	50
cardiac procedures	210
cardioversion	25
catheterization	43
diagnostic procedures	42
doctor visit	2655
hospital care	469
implant surgery	63
implantable cardioverter-defibrillator (ICD) replacement	13
inpatient care	469
lab tests	877
minimally invasive procedures	149
stress testing	40

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1122
Female	1115

**Ethnicity**
Non-Hispanic White	2135
Black	0
Hispanic	27
Asian	0
Other	49
Native American	0

**Age**
From 65 to 74	687
From 75 to 84	829
85 and over	580
Less than 65	141

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2017

Hypertension	75
High Cholesterol	55
Stroke	9
Ischemic Heart Disease	54
Depression	29
Chronic Kidney Disease	44
Asthma	9
Osteoperosis	9
Atrial Fibrilation	47
Heart Failure	46
Chronic Obstructive Pulmonary Disease	23
Diabetes	30
Dementia	23
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2018 were lab tests, inpatient care, hospital care and cardiac procedures.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	50
blood draw	152
cardiac procedures	241
cardioversion	19
catheterization	50
diagnostic procedures	49
doctor visit	2491
hospital care	461
implant surgery	109
implantable cardioverter-defibrillator (ICD) replacement	31
inpatient care	461
lab tests	1008
minimally invasive procedures	224
stress testing	54
ultrasound (sonogram)	15

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1274
Female	1305

**Ethnicity**
Non-Hispanic White	2446
Black	35
Hispanic	21
Asian	0
Other	60
Native American	0

**Age**
From 65 to 74	773
From 75 to 84	933
85 and over	652
Less than 65	221

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2018

Hypertension	75
High Cholesterol	66
Stroke	11
Ischemic Heart Disease	53
Depression	31
Chronic Kidney Disease	45
Asthma	8
Osteoperosis	8
Atrial Fibrilation	44
Heart Failure	45
Chronic Obstructive Pulmonary Disease	23
Diabetes	31
Dementia	25
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2019 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	31
blood draw	267
cardiac procedures	166
cardioversion	20
catheterization	31
diagnostic procedures	31
doctor visit	2168
emergency care	34
hospital care	497
implant surgery	86
implantable cardioverter-defibrillator (ICD) replacement	22
inpatient care	468
lab tests	874
minimally invasive procedures	159
outpatient care	29
stress testing	23
ultrasound (sonogram)	11

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1268
Female	1285

**Ethnicity**
Non-Hispanic White	2420
Black	28
Hispanic	18
Asian	19
Other	68
Native American	0

**Age**
From 65 to 74	798
From 75 to 84	950
85 and over	619
Less than 65	186

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2019

Hypertension	75
High Cholesterol	64
Stroke	11
Ischemic Heart Disease	54
Depression	34
Chronic Kidney Disease	45
Asthma	10
Osteoperosis	10
Atrial Fibrilation	44
Heart Failure	45
Chronic Obstructive Pulmonary Disease	24
Diabetes	29
Dementia	22
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2020 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	53
blood draw	251
cardiac procedures	161
cardioversion	14
catheterization	53
diagnostic procedures	53
doctor visit	1583
hospital care	438
implant surgery	80
implantable cardioverter-defibrillator (ICD) replacement	27
inpatient care	427
lab tests	697
minimally invasive procedures	200
outpatient care	11
ultrasound (sonogram)	14

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1270
Female	1351

**Ethnicity**
Non-Hispanic White	2495
Black	24
Hispanic	16
Asian	14
Other	72
Native American	0

**Age**
From 65 to 74	865
From 75 to 84	987
85 and over	598
Less than 65	171

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2020

Hypertension	75
High Cholesterol	63
Stroke	10
Ischemic Heart Disease	50
Depression	30
Chronic Kidney Disease	44
Asthma	9
Osteoperosis	11
Atrial Fibrilation	41
Heart Failure	42
Chronic Obstructive Pulmonary Disease	20
Diabetes	28
Dementia	22
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2021 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	39
blood draw	288
cardiac procedures	130
cardioversion	14
catheterization	39
diagnostic procedures	39
doctor visit	1863
hospital care	348
implant surgery	79
implantable cardioverter-defibrillator (ICD) replacement	23
inpatient care	336
lab tests	555
minimally invasive procedures	169
outpatient care	12
ultrasound (sonogram)	12

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1384
Female	1476

**Ethnicity**
Non-Hispanic White	2710
Black	33
Hispanic	21
Asian	0
Other	73
Native American	0

**Age**
From 65 to 74	947
From 75 to 84	1144
85 and over	603
Less than 65	166

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2021

Hypertension	75
High Cholesterol	65
Stroke	10
Ischemic Heart Disease	49
Depression	28
Chronic Kidney Disease	43
Asthma	9
Osteoperosis	11
Atrial Fibrilation	37
Heart Failure	41
Chronic Obstructive Pulmonary Disease	20
Diabetes	28
Dementia	18
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA during 2022 were lab tests, blood draw, hospital care and inpatient care.

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

ablation	37
blood draw	345
cardiac procedures	90
cardioversion	22
catheterization	37
diagnostic procedures	37
doctor visit	1934
hospital care	281
implant surgery	53
inpatient care	281
lab tests	467
minimally invasive procedures	127

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Male	1323
Female	1470

**Ethnicity**
Non-Hispanic White	2635
Black	30
Hispanic	23
Asian	24
Other	81
Native American	0

**Age**
From 65 to 74	851
From 75 to 84	1154
85 and over	621
Less than 65	167

Conditions of Medicare patients treated by Dr. Seth McClennen, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	17
Ischemic Heart Disease	40
Depression	25
Chronic Kidney Disease	33
Asthma	13
Osteoperosis	15
Atrial Fibrilation	53
Heart Failure	39
Chronic Obstructive Pulmonary Disease	22
Diabetes	28
Dementia	14
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Seth McClennen, MD for Medicare patients.

The highest averages for the top procedures that Dr. Seth McClennen, MD treated as a cardiac electrophysiologist in BOSTON, MA were lab tests, hospital care, inpatient care and blood draw.

ablation	45
ambulatory monitoring	56
blood draw	260
cardiac procedures	195
cardioversion	19
catheterization	45
diagnostic procedures	44
doctor visit	2414
emergency care	34
hospital care	474
implant surgery	73
implantable cardioverter-defibrillator (ICD) replacement	23
inpatient care	455
lab tests	803
minimally invasive procedures	172
outpatient care	26
stress testing	34
ultrasound (sonogram)	14

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Seth McClennen, MD.

**Gender**
Female	1244
Male	1202

**Ethnicity**
Black / African American	23
Asian / Pacific Islander	5
Non-Hispanic White	2337
Hispanic	12
Native American / Alaskan Native	0
Other	51

**Age**
85 and over	616
75 to 84	910
Less than 65	172
65 to 74	748

Average of Total of Conditions of Medicare patients treated by Dr. Seth McClennen, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Seth McClennen, MD treated were hypertension, high cholesterol, ischemic heart disease and atrial fibrilation.

Hypertension	68
High Cholesterol	58
Stroke	9
Ischemic Heart Disease	47
Depression	26
Chronic Kidney Disease	38
Asthma	10
Osteoporosis	9
Heart Failure	40
Chronic Obstructive Pulmonary Disease	21
Diabetes	27
Atrial Fibrillation	41
Dementia	19
Cancer	15

Education & Training

Dr. Seth McClennen, MD graduated from Dartmouth Medical School in 1997. He completed residency at Beth Israel Deaconess Medical Center. He is certified by the American Board of Internal Medicine: Cardiovascular Disease and has a state license in Massachusetts.

Medical School: Dartmouth Medical School (1997)

Residency: Beth Israel Deaconess Medical Center

Board Certification: American Board of Internal Medicine: Cardiovascular Disease

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Seth McClennen, MD is associated with these hospitals and organizations:

South Shore Health

Ratings & Reviews

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General Payments

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

**Payments by Company**
Medtronic Vascular, Inc.	$622 STENTS $167	Pacemakers $56	Implantable Cardioverter Defibrillators - ICDs $38	Azure $29	$333
Boehringer Ingelheim Pharmaceuticals, Inc.	$266 Pradaxa $237	TRADJENTA $21	$8
Janssen Pharmaceuticals, Inc	$154 INVOKANA $111	XARELTO $40	$2
E.R. Squibb & Sons, L.L.C.	$151 ELIQUIS $151
Daiichi Sankyo Inc.	$122 SAVAYSA $104	Welchol $19
Other	$330 VIGILANT $45	LifeVest $44	Cardiva VASCADE MVP VVCS 6-12F $40	ELIQUIS $31	Ozempic $23	Other $147

**Types of Payments**
Food and Beverage	$1,133
Consulting Fee	$500
Education	$14

Research Payments

Dr. Seth McClennen, MD has received 6 research payments totaling $804.

Biography

Dr. Seth McClennen works as an adult cardiology and cardiac electrophysiology (heart rhythm). He attended Dartmouth Medical School and then went on to complete his residency at Beth Israel Deaconess Medical Center. In Dr. McClennen's practice, he is particularly interested in atrial flutter, pain, and pneumonia. He is affiliated with South Shore Health. Doctor.com reports that Dr. McClennen is accepting new patients at his office in Boston, MA.