In 2023, among providers in related specialties within Maryland, Dr. Robert J. Marshall, MD performed more coronary angiogram, and left heart catheterization procedures for Medicare patients than 95% of them and he also had a list price for angiogram (angiography), coronary angiogram, diagnostic cardiac catheterization, and left heart catheterization that was lower than the list prices billed to Medicare by 95% 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.

Top 10%

By Volume:

cardiac procedures

In 2023, Dr. Robert J. Marshall, MD performed more cardiac procedures procedures for Medicare patients than 90% of providers in related specialties within Maryland.

Top 25%

By Volume:

cardiac catheterization

cardiac stress testing

Doppler echocardiography

ultrasound

By Affordability:

color Doppler echocardiography

Doppler echocardiography

spectral Doppler echocardiography

transthoracic echocardiography

In 2012, among providers in related specialties within Maryland, Dr. Robert J. Marshall, MD performed more cardiac catheterization, cardiac (heart) stress testing, Doppler echocardiography, and ultrasound (sonogram) procedures for Medicare patients than 75% of them and he also had a list price for color Doppler echocardiography, Doppler echocardiography, spectral Doppler echocardiography, and transthoracic echocardiography (TTE) 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. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2012 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

abdominal imaging	12
cardiac procedures	398
catheterization	110
diagnostic procedures	72
doctor visit	605
hospital care	156
inpatient care	142
minimally invasive procedures	110
nuclear scan	28
outpatient care	14
pelvic imaging	12
stent placement (stenting)	38
stress testing	107
ultrasound (sonogram)	248
vascular procedures	107

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2013 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

angioplasty	34
cardiac procedures	325
catheterization	116
diagnostic procedures	52
doctor visit	583
emergency care	13
hospital care	87
inpatient care	87
lab tests	65
minimally invasive procedures	116
nuclear scan	17
stent placement (stenting)	34
stress testing	83
ultrasound (sonogram)	189
vascular procedures	70

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	350
Female	368

**Ethnicity**
Non-Hispanic White	562
Black	105
Hispanic	14
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	245
From 75 to 84	233
85 and over	186
Less than 65	54

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2013

Hypertension	75
High Cholesterol	70
Stroke	10
Ischemic Heart Disease	60
Depression	25
Chronic Kidney Disease	35
Asthma	8
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	36
Chronic Obstructive Pulmonary Disease	18
Diabetes	35
Dementia	19
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2014 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

cardiac procedures	306
catheterization	84
diagnostic procedures	61
doctor visit	640
emergency care	23
hospital care	27
inpatient care	27
lab tests	46
minimally invasive procedures	84
nuclear scan	16
stress testing	83
ultrasound (sonogram)	200
vascular procedures	74

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	316
Female	321

**Ethnicity**
Non-Hispanic White	503
Black	84
Hispanic	13
Asian	26
Other	11
Native American	0

**Age**
From 65 to 74	228
From 75 to 84	217
85 and over	148
Less than 65	44

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2014

Hypertension	75
High Cholesterol	70
Stroke	10
Ischemic Heart Disease	58
Depression	23
Chronic Kidney Disease	31
Asthma	8
Osteoperosis	10
Atrial Fibrilation	24
Heart Failure	32
Chronic Obstructive Pulmonary Disease	17
Diabetes	33
Dementia	16
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2015 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

angioplasty	26
cardiac procedures	397
catheterization	140
diagnostic procedures	73
doctor visit	728
emergency care	28
hospital care	16
inpatient care	16
minimally invasive procedures	140
nuclear scan	17
stent placement (stenting)	26
stress testing	103
ultrasound (sonogram)	247
vascular procedures	103

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	692
Female	614

**Ethnicity**
Non-Hispanic White	1008
Black	184
Hispanic	32
Asian	44
Other	38
Native American	0

**Age**
From 65 to 74	502
From 75 to 84	444
85 and over	280
Less than 65	80

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2015

Hypertension	75
High Cholesterol	71
Stroke	9
Ischemic Heart Disease	60
Depression	20
Chronic Kidney Disease	28
Asthma	14
Osteoperosis	7
Atrial Fibrilation	21
Heart Failure	29
Chronic Obstructive Pulmonary Disease	15
Diabetes	32
Dementia	16
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2016 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

angioplasty	76
cardiac procedures	453
catheterization	190
diagnostic procedures	76
doctor visit	705
hospital care	29
inpatient care	29
minimally invasive procedures	190
nuclear scan	19
stent placement (stenting)	76
stress testing	104
ultrasound (sonogram)	250
vascular procedures	105

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	319
Female	301

**Ethnicity**
Non-Hispanic White	490
Black	74
Hispanic	21
Asian	16
Other	19
Native American	0

**Age**
From 65 to 74	244
From 75 to 84	218
85 and over	106
Less than 65	52

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2016

Hypertension	75
High Cholesterol	64
Stroke	7
Ischemic Heart Disease	64
Depression	20
Chronic Kidney Disease	33
Asthma	17
Osteoperosis	8
Atrial Fibrilation	20
Heart Failure	30
Chronic Obstructive Pulmonary Disease	14
Diabetes	33
Dementia	14
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2017 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

angioplasty	62
cardiac procedures	502
catheterization	163
diagnostic procedures	70
doctor visit	822
hospital care	43
inpatient care	43
minimally invasive procedures	163
nuclear scan	18
stent placement (stenting)	62
stress testing	130
ultrasound (sonogram)	304
vascular procedures	99

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	379
Female	393

**Ethnicity**
Non-Hispanic White	597
Black	112
Hispanic	14
Asian	16
Other	33
Native American	0

**Age**
From 65 to 74	314
From 75 to 84	259
85 and over	146
Less than 65	53

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2017

Hypertension	75
High Cholesterol	61
Stroke	9
Ischemic Heart Disease	58
Depression	24
Chronic Kidney Disease	34
Asthma	9
Osteoperosis	9
Atrial Fibrilation	20
Heart Failure	28
Chronic Obstructive Pulmonary Disease	15
Diabetes	34
Dementia	15
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2018 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

abdominal imaging	22
angioplasty	48
cardiac procedures	518
catheterization	172
diagnostic procedures	86
doctor visit	971
emergency care	14
hospital care	26
inpatient care	26
minimally invasive procedures	172
nuclear scan	17
pelvic imaging	22
stent placement (stenting)	48
stress testing	118
ultrasound (sonogram)	362
vascular procedures	150

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	483
Female	484

**Ethnicity**
Non-Hispanic White	770
Black	117
Hispanic	21
Asian	20
Other	39
Native American	0

**Age**
From 65 to 74	366
From 75 to 84	358
85 and over	183
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2018

Hypertension	75
High Cholesterol	68
Stroke	12
Ischemic Heart Disease	55
Depression	26
Chronic Kidney Disease	32
Asthma	9
Osteoperosis	9
Atrial Fibrilation	23
Heart Failure	30
Chronic Obstructive Pulmonary Disease	17
Diabetes	32
Dementia	16
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2019 were cardiac procedures, ultrasound (sonogram), vascular procedures and minimally invasive procedures.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

abdominal imaging	25
angioplasty	36
cardiac procedures	502
catheterization	162
diagnostic procedures	94
doctor visit	1047
emergency care	14
hospital care	63
inpatient care	63
minimally invasive procedures	162
nuclear scan	16
pelvic imaging	25
stent placement (stenting)	36
stress testing	137
ultrasound (sonogram)	365
vascular procedures	166

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	983
Female	1224

**Ethnicity**
Non-Hispanic White	1563
Black	448
Hispanic	57
Asian	51
Other	88
Native American	0

**Age**
From 65 to 74	747
From 75 to 84	773
85 and over	537
Less than 65	150

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2019

Hypertension	75
High Cholesterol	68
Stroke	12
Ischemic Heart Disease	50
Depression	29
Chronic Kidney Disease	38
Asthma	11
Osteoperosis	10
Atrial Fibrilation	23
Heart Failure	29
Chronic Obstructive Pulmonary Disease	17
Diabetes	30
Dementia	21
Cancer	20

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2020 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

abdominal imaging	21
angioplasty	74
cardiac procedures	613
catheterization	269
diagnostic procedures	147
doctor visit	1166
emergency care	11
hospital care	46
inpatient care	46
minimally invasive procedures	269
nuclear scan	11
pelvic imaging	21
stent placement (stenting)	74
stress testing	122
ultrasound (sonogram)	361
vascular procedures	204

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	1055
Female	1212

**Ethnicity**
Non-Hispanic White	1628
Black	426
Hispanic	76
Asian	45
Other	92
Native American	0

**Age**
From 65 to 74	782
From 75 to 84	819
85 and over	522
Less than 65	144

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2020

Hypertension	75
High Cholesterol	66
Stroke	15
Ischemic Heart Disease	52
Depression	27
Chronic Kidney Disease	38
Asthma	10
Osteoperosis	10
Atrial Fibrilation	21
Heart Failure	28
Chronic Obstructive Pulmonary Disease	14
Diabetes	32
Dementia	22
Cancer	18

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2021 were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

abdominal imaging	19
angioplasty	90
cardiac procedures	772
catheterization	302
diagnostic procedures	167
doctor visit	1484
hospital care	59
inpatient care	59
minimally invasive procedures	302
nuclear scan	21
pelvic imaging	19
stent placement (stenting)	90
stress testing	138
ultrasound (sonogram)	485
vascular procedures	277

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	960
Female	1004

**Ethnicity**
Non-Hispanic White	1467
Black	311
Hispanic	57
Asian	46
Other	83
Native American	0

**Age**
From 65 to 74	706
From 75 to 84	744
85 and over	385
Less than 65	129

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2021

Hypertension	75
High Cholesterol	71
Stroke	13
Ischemic Heart Disease	53
Depression	26
Chronic Kidney Disease	39
Asthma	10
Osteoperosis	11
Atrial Fibrilation	21
Heart Failure	26
Chronic Obstructive Pulmonary Disease	15
Diabetes	33
Dementia	17
Cancer	18

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD during 2022 were cardiac procedures, ultrasound (sonogram), vascular procedures and stress testing.

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

abdominal imaging	29
angioplasty	48
cardiac procedures	732
catheterization	155
diagnostic procedures	72
doctor visit	1458
emergency care	11
hospital care	54
inpatient care	54
minimally invasive procedures	155
nuclear scan	25
pelvic imaging	29
stent placement (stenting)	48
stress testing	167
ultrasound (sonogram)	584
vascular procedures	223

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Male	1010
Female	1169

**Ethnicity**
Non-Hispanic White	1617
Black	362
Hispanic	56
Asian	49
Other	95
Native American	0

**Age**
From 65 to 74	757
From 75 to 84	868
85 and over	429
Less than 65	125

Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	18
Ischemic Heart Disease	41
Depression	22
Chronic Kidney Disease	26
Asthma	11
Osteoperosis	15
Atrial Fibrilation	29
Heart Failure	24
Chronic Obstructive Pulmonary Disease	17
Diabetes	31
Dementia	12
Cancer	22

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Robert J. Marshall, MD for Medicare patients.

The highest averages for the top procedures that Dr. Robert J. Marshall, MD treated as a cardiologist in Chevy Chase, MD were cardiac procedures, ultrasound (sonogram), minimally invasive procedures and catheterization.

abdominal imaging	21
angioplasty	54
cardiac procedures	501
catheterization	169
diagnostic procedures	88
doctor visit	928
emergency care	16
hospital care	55
inpatient care	53
lab tests	55
minimally invasive procedures	169
nuclear scan	18
outpatient care	14
pelvic imaging	21
stent placement (stenting)	53
stress testing	117
ultrasound (sonogram)	326
vascular procedures	143

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Robert J. Marshall, MD.

**Gender**
Female	644
Male	595

**Ethnicity**
Black / African American	202
Asian / Pacific Islander	30
Non-Hispanic White	927
Native American / Alaskan Native	0
Hispanic	32
Other	45

**Age**
85 and over	265
75 to 84	448
Less than 65	75
65 to 74	444

Average of Total of Conditions of Medicare patients treated by Dr. Robert J. Marshall, MD From 2012 - 2022

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

Hypertension	68
High Cholesterol	62
Stroke	10
Ischemic Heart Disease	50
Depression	22
Chronic Kidney Disease	30
Asthma	9
Osteoporosis	8
Heart Failure	26
Chronic Obstructive Pulmonary Disease	14
Diabetes	29
Atrial Fibrillation	20
Dementia	15
Cancer	14

Education & Training

He has a state license in Maryland.

Licensed In: Maryland

Ratings & Reviews

Dr. Robert J. Marshall, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 1 ratings. We collect ratings and reviews of Dr. Robert J. Marshall, MD from all over the web to help you find the right in Chevy Chase, MD.

Overall Rating

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General Payments

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

**Payments by Company**
AstraZeneca Pharmaceuticals LP	$79,060 BRILINTA $78,844	FARXIGA $129	CRESTOR $66	$22
Allergan, Inc.	$7,021 $7,021
Abbott Laboratories	$1,534 Confirm Rx $499	THORATEC HEARTMATE 3 LVAS IMPLANT KIT $463	Quadra Assura CRT Defibrillator $144	Merlin Connectivity and Remote $132	Absorb GT1 $120	Other $177
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)	$809 LifeVest $809
Medtronic, Inc.	$711 ONYX FRONTIER $176	Micra $176	COBALT DR MRI SURESCAN $171	COREVALVE EVOLUT R $157	LINQ II $20	Other $11
Other	$5,265 Repatha $509	ENTRESTO $384	ELIQUIS $356	EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX $337	XARELTO $310	Other $3,369

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$78,571
Food and Beverage	$12,273
Travel and Lodging	$3,534
Education	$22

Research Payments

Dr. Robert J. Marshall, MD has received 2 research payments totaling $1,725.

Biography

Dr. Robert Marshall, who practices in Chevy Chase, MD, is a medical specialist in adult cardiology. Dr. Marshall has obtained a license to practice in Maryland.