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Dr. Brendan Casey Merchant, MD

(Brendan Merchant, MD)

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Specializes in: Cardiology (Heart Disease)

541 Main Street
South Weymouth, MA 02190

(781) 952-1240

Dr. Brendan Casey Merchant, MD is a cardiologist in South Weymouth, MA specializing in cardiology (heart disease). Dr. Brendan Casey Merchant, MD is affiliated with South Shore Health and Brigham and Women's Harbor Medical Associates.

Office Locations

541 Main Street
South Weymouth, MA 02190

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Noteworthy Medicare Patient Procedures Performed by Dr. Brendan Casey Merchant, MD in 2023

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

Top 5%

By Volume:

ankle brachial index

cardiac procedures

ultrasound

In 2023, Dr. Brendan Casey Merchant, MD performed more ankle brachial index (ABI), cardiac procedures, and ultrasound (sonogram) procedures for Medicare patients than 95% of providers in related specialties within Massachusetts.

Top 10%

By Volume:

cardiac stress testing

vascular procedures

In 2023, Dr. Brendan Casey Merchant, MD performed more cardiac (heart) stress testing, and vascular procedures procedures for Medicare patients than 90% of providers in related specialties within Massachusetts.

Top 25%

By Volume:

blood draw

carotid duplex ultrasound

Doppler echocardiography

echocardiogram

flu shot

Holter monitoring

myocardial perfusion SPECT

nuclear scan

phlebotomy for lab tests

prothrombin time test

vascular ultrasound

By Affordability:

lower extremity venous ultrasound

lower extremity venous duplex

venous duplex ultrasound

venous ultrasound

In 2012, among providers in related specialties within Massachusetts, Dr. Brendan Casey Merchant, MD performed more blood draw, carotid duplex ultrasound, Doppler echocardiography, echocardiogram (echo), flu shot, Holter monitoring, myocardial perfusion SPECT, nuclear scan, phlebotomy for lab tests, prothrombin time (PT) test, and vascular ultrasound procedures for Medicare patients than 75% of them and he also had a list price for lower extremity (leg) venous ultrasound, lower extremity venous duplex, venous duplex ultrasound, and venous ultrasound that was lower than the list prices billed to Medicare by 75% of them. 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. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

hospital care	418
inpatient care	418

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2013 were hospital care and inpatient care.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

hospital care	539
inpatient care	539

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	84
Female	120

**Ethnicity**
Non-Hispanic White	90
Black	101
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	46
85 and over	27
Less than 65	54

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	16
Ischemic Heart Disease	49
Depression	40
Chronic Kidney Disease	66
Asthma	14
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	53
Chronic Obstructive Pulmonary Disease	27
Diabetes	59
Dementia	25
Cancer	21

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2016 were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	16
cardiac procedures	518
doctor visit	147
hospital care	328
inpatient care	311
minimally invasive procedures	21
nuclear scan	76
outpatient care	17
stress testing	208
ultrasound (sonogram)	294

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	278
Female	309

**Ethnicity**
Non-Hispanic White	563
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	207
From 75 to 84	237
85 and over	100
Less than 65	43

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2016

Hypertension	75
High Cholesterol	69
Stroke	12
Ischemic Heart Disease	56
Depression	27
Chronic Kidney Disease	41
Asthma	27
Osteoperosis	9
Atrial Fibrilation	35
Heart Failure	43
Chronic Obstructive Pulmonary Disease	25
Diabetes	32
Dementia	16
Cancer	18

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2017 were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	39
cardiac procedures	906
doctor visit	555
hospital care	562
inpatient care	562
minimally invasive procedures	22
nuclear scan	146
stress testing	382
ultrasound (sonogram)	556
vascular procedures	67

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	712
Female	844

**Ethnicity**
Non-Hispanic White	1485
Black	17
Hispanic	20
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	543
From 75 to 84	557
85 and over	324
Less than 65	132

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2017

Hypertension	75
High Cholesterol	61
Stroke	14
Ischemic Heart Disease	54
Depression	34
Chronic Kidney Disease	48
Asthma	9
Osteoperosis	10
Atrial Fibrilation	32
Heart Failure	40
Chronic Obstructive Pulmonary Disease	26
Diabetes	33
Dementia	22
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2018 were cardiac procedures, ultrasound (sonogram), inpatient care and hospital care.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	63
blood draw	66
cardiac procedures	909
cardioversion	14
doctor visit	770
emergency care	11
hospital care	447
inpatient care	447
lab tests	129
minimally invasive procedures	39
nuclear scan	100
stress testing	313
ultrasound (sonogram)	735
vascular procedures	237

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	1049
Female	1206

**Ethnicity**
Non-Hispanic White	2146
Black	36
Hispanic	17
Asian	0
Other	42
Native American	0

**Age**
From 65 to 74	765
From 75 to 84	795
85 and over	483
Less than 65	212

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2018

Hypertension	75
High Cholesterol	69
Stroke	12
Ischemic Heart Disease	53
Depression	34
Chronic Kidney Disease	45
Asthma	8
Osteoperosis	10
Atrial Fibrilation	31
Heart Failure	41
Chronic Obstructive Pulmonary Disease	26
Diabetes	31
Dementia	25
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2019 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	23
blood draw	225
cardiac procedures	1004
doctor visit	1049
emergency care	25
hospital care	384
inpatient care	384
lab tests	245
minimally invasive procedures	27
nuclear scan	125
stress testing	318
ultrasound (sonogram)	876
vascular procedures	251

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	1190
Female	1439

**Ethnicity**
Non-Hispanic White	2490
Black	44
Hispanic	23
Asian	0
Other	53
Native American	0

**Age**
From 65 to 74	893
From 75 to 84	982
85 and over	531
Less than 65	223

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2019

Hypertension	75
High Cholesterol	68
Stroke	11
Ischemic Heart Disease	52
Depression	33
Chronic Kidney Disease	45
Asthma	10
Osteoperosis	11
Atrial Fibrilation	28
Heart Failure	39
Chronic Obstructive Pulmonary Disease	26
Diabetes	31
Dementia	21
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2020 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

blood draw	234
cardiac procedures	896
doctor visit	1095
hospital care	350
inpatient care	350
lab tests	311
minimally invasive procedures	30
nuclear scan	137
preventive care	26
stress testing	304
ultrasound (sonogram)	793
vaccines	26
vascular procedures	234

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	1204
Female	1498

**Ethnicity**
Non-Hispanic White	2550
Black	35
Hispanic	30
Asian	0
Other	70
Native American	0

**Age**
From 65 to 74	946
From 75 to 84	1034
85 and over	478
Less than 65	244

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2020

Hypertension	75
High Cholesterol	68
Stroke	11
Ischemic Heart Disease	52
Depression	32
Chronic Kidney Disease	43
Asthma	11
Osteoperosis	11
Atrial Fibrilation	27
Heart Failure	37
Chronic Obstructive Pulmonary Disease	22
Diabetes	31
Dementia	21
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2021 were cardiac procedures, ultrasound (sonogram), stress testing and inpatient care.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	43
blood draw	260
cardiac procedures	1109
doctor visit	1188
hospital care	318
inpatient care	318
lab tests	283
minimally invasive procedures	20
nuclear scan	193
preventive care	22
stress testing	440
ultrasound (sonogram)	864
vaccines	22
vascular procedures	291

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	1419
Female	1837

**Ethnicity**
Non-Hispanic White	3085
Black	39
Hispanic	35
Asian	0
Other	73
Native American	0

**Age**
From 65 to 74	1145
From 75 to 84	1306
85 and over	594
Less than 65	211

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2021

Hypertension	75
High Cholesterol	70
Stroke	10
Ischemic Heart Disease	48
Depression	30
Chronic Kidney Disease	41
Asthma	11
Osteoperosis	13
Atrial Fibrilation	26
Heart Failure	36
Chronic Obstructive Pulmonary Disease	20
Diabetes	28
Dementia	17
Cancer	17

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2022 were cardiac procedures, ultrasound (sonogram), vascular procedures and stress testing.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	46
blood draw	283
cardiac procedures	900
cardioversion	14
doctor visit	1276
hospital care	225
inpatient care	225
lab tests	252
minimally invasive procedures	28
nuclear scan	154
preventive care	18
stress testing	329
ultrasound (sonogram)	837
vaccines	18
vascular procedures	364

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	1445
Female	1740

**Ethnicity**
Non-Hispanic White	3018
Black	37
Hispanic	29
Asian	14
Other	87
Native American	0

**Age**
From 65 to 74	1063
From 75 to 84	1351
85 and over	582
Less than 65	189

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	17
Ischemic Heart Disease	43
Depression	26
Chronic Kidney Disease	32
Asthma	13
Osteoperosis	18
Atrial Fibrilation	35
Heart Failure	31
Chronic Obstructive Pulmonary Disease	23
Diabetes	30
Dementia	13
Cancer	21

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA during 2023 were cardiac procedures, ultrasound (sonogram), vascular procedures and stress testing.

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

ambulatory monitoring	44
blood draw	272
cardiac procedures	992
cardioversion	13
doctor visit	1243
hospital care	252
inpatient care	252
lab tests	185
minimally invasive procedures	25
nuclear scan	144
preventive care	33
stress testing	343
ultrasound (sonogram)	942
vaccines	33
vascular procedures	398

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	1481
Female	1892

**Ethnicity**
Non-Hispanic White	3181
Black	41
Hispanic	38
Asian	16
Other	97
Native American	0

**Age**
From 65 to 74	1141
From 75 to 84	1428
85 and over	611
Less than 65	193

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	41
Depression	26
Chronic Kidney Disease	31
Asthma	14
Osteoperosis	17
Atrial Fibrilation	33
Heart Failure	30
Chronic Obstructive Pulmonary Disease	25
Diabetes	31
Dementia	12
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Brendan Casey Merchant, MD for Medicare patients.

The highest averages for the top procedures that Dr. Brendan Casey Merchant, MD treated as a cardiologist in South Weymouth, MA were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

ambulatory monitoring	39
blood draw	223
cardiac procedures	904
cardioversion	13
doctor visit	915
emergency care	18
hospital care	382
inpatient care	380
lab tests	234
minimally invasive procedures	26
nuclear scan	134
outpatient care	17
preventive care	24
stress testing	329
ultrasound (sonogram)	737
vaccines	24
vascular procedures	263

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Brendan Casey Merchant, MD.

**Gender**
Male	886
Female	1088

**Ethnicity**
Black / African American	35
Asian / Pacific Islander	3
Non-Hispanic White	1860
Hispanic	19
Native American / Alaskan Native	0
Other	44

**Age**
75 to 84	773
85 and over	373
Less than 65	150
65 to 74	678

Average of Total of Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Brendan Casey Merchant, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	67
High Cholesterol	62
Stroke	11
Ischemic Heart Disease	44
Depression	28
Chronic Kidney Disease	39
Asthma	11
Osteoporosis	10
Heart Failure	35
Chronic Obstructive Pulmonary Disease	22
Diabetes	30
Atrial Fibrillation	26
Cancer	16
Dementia	17

Education & Training

He completed residency at Georgetown University Hospital. He is certified by the Board Certification: Cardiovascular Disease and has a state license in District of Columbia.

Residency: Georgetown University Hospital

Board Certification: Board Certification: Cardiovascular Disease

Licensed In: District of Columbia

Affiliations & Hospitals

Dr. Brendan Casey Merchant, MD is associated with these hospitals and organizations:

South Shore Health

Brigham and Women's Harbor Medical Associates

Ratings & Reviews

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General Payments

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

**Payments by Company**
Bard Peripheral Vascular, Inc.	$104 $104
Novartis Pharmaceuticals Corporation	$98 ENTRESTO $98
Medtronic Vascular, Inc.	$94 CoreValve Evolut $94

**Types of Payments**
Food and Beverage	$295

Biography

Dr. Brendan Merchant's specialty is cardiology (heart disease). He is affiliated with South Shore Health. Dr. Merchant attended Georgetown University School of Medicine and subsequently trained at Georgetown University Hospital for residency.

Select Year:

Dr. Brendan Casey Merchant, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Brendan Casey Merchant, MD in 2023

By Volume:

By Volume:

By Volume:

By Affordability:

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. Brendan Casey Merchant, MD in 2013

Medicare Procedure and Patient Information

Medicare Procedure and Patient Information

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Average Medicare Patient Data From 2012 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Brendan Casey Merchant, MD From 2012 - 2023

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography