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Dr. Robert K. Masters, MD

(3 Ratings)

Specializes in: Adult Cardiology

University of California, Irvine, School of Medicine (1972)

24411 Health Center Drive Suite 550
Laguna Hills, CA

(949) 770-6252

Dr. Robert K. Masters, MD is a cardiologist in Laguna Hills, CA specializing in adult cardiology. He graduated from University of California, Irvine, School of Medicine in 1972 and has 54 years of experience. Dr. Robert K. Masters, MD is affiliated with Saddleback Medical Center, MemorialCare and MemorialCare Medical Group MemorialCare Independent Physicians.

Office Locations

24411 Health Center Drive #550
Laguna Hills, CA 92653

(949) 770-6252

(949) 916-0140

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24411 Health Center Drive Suite 550
Laguna Hills, CA

(949) 770-6252

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Noteworthy Medicare Patient Procedures Performed by Dr. Robert K. Masters, MD in 2024

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

Top 5%

By Affordability:

cardiac imaging

color Doppler echocardiography

Doppler echocardiography

Doppler ultrasound

hospital care

inpatient care

inpatient hospital care

spectral Doppler echocardiography

In 2024, Dr. Robert K. Masters, MD had a list price for cardiac imaging, color Doppler echocardiography, Doppler echocardiography, Doppler ultrasound, hospital care, inpatient care, inpatient hospital care (for patient admitted to hospital), and spectral Doppler echocardiography that was lower than the list prices billed to Medicare by 95% of providers in related specialties within California. 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 Affordability:

echocardiogram

stress echo

transthoracic echocardiography

ultrasound

In 2024, Dr. Robert K. Masters, MD had a list price for echocardiogram (echo), stress echo, transthoracic echocardiography (TTE), and ultrasound (sonogram) that was lower than the list prices billed to Medicare by 90% of providers in related specialties within California. 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 25%

By Affordability:

cardiac procedures

electrocardiogram

myocardial perfusion SPECT

In 2012, Dr. Robert K. Masters, MD had a list price for cardiac procedures, electrocardiogram (EKG), myocardial perfusion SPECT, nuclear scan, nuclear stress test (myocardial perfusion imaging), SPECT scan, and stress EKG that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. 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 K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2012 were cardiac procedures, inpatient care, hospital care and ultrasound (sonogram).

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	22
cardiac procedures	495
catheterization	68
diagnostic procedures	37
doctor visit	823
hospital care	359
implant surgery	26
inpatient care	359
minimally invasive procedures	83
nuclear scan	31
stent placement (stenting)	31
stress testing	173
ultrasound (sonogram)	328
vascular procedures	48

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2013 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	25
cardiac procedures	374
catheterization	25
diagnostic procedures	25
doctor visit	837
hospital care	263
implant surgery	11
inpatient care	263
minimally invasive procedures	36
nuclear scan	28
stress testing	156
ultrasound (sonogram)	271
vascular procedures	38

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	376
Female	371

**Ethnicity**
Non-Hispanic White	675
Black	0
Hispanic	23
Asian	35
Other	0
Native American	0

**Age**
From 65 to 74	238
From 75 to 84	236
85 and over	248
Less than 65	25

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2013

Hypertension	75
High Cholesterol	59
Stroke	11
Ischemic Heart Disease	63
Depression	23
Chronic Kidney Disease	37
Asthma	10
Osteoperosis	12
Atrial Fibrilation	25
Heart Failure	36
Chronic Obstructive Pulmonary Disease	21
Diabetes	33
Dementia	19
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2014 were cardiac procedures, inpatient care, hospital care and ultrasound (sonogram).

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	14
angioplasty	40
cardiac procedures	489
cardioversion	13
catheterization	97
diagnostic procedures	37
doctor visit	902
hospital care	335
implant surgery	22
inpatient care	335
minimally invasive procedures	119
nuclear scan	22
stent placement (stenting)	40
stress testing	166
ultrasound (sonogram)	291
vascular procedures	37

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	437
Female	469

**Ethnicity**
Non-Hispanic White	798
Black	13
Hispanic	37
Asian	45
Other	13
Native American	0

**Age**
From 65 to 74	278
From 75 to 84	285
85 and over	310
Less than 65	33

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2014

Hypertension	75
High Cholesterol	60
Stroke	11
Ischemic Heart Disease	58
Depression	25
Chronic Kidney Disease	39
Asthma	11
Osteoperosis	16
Atrial Fibrilation	24
Heart Failure	36
Chronic Obstructive Pulmonary Disease	22
Diabetes	34
Dementia	20
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2015 were cardiac procedures, inpatient care, hospital care and ultrasound (sonogram).

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	28
angioplasty	50
cardiac procedures	415
catheterization	101
diagnostic procedures	26
doctor visit	839
hospital care	265
implant surgery	18
inpatient care	265
minimally invasive procedures	119
nuclear scan	14
stent placement (stenting)	50
stress testing	136
ultrasound (sonogram)	253
vascular procedures	40

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	724
Female	708

**Ethnicity**
Non-Hispanic White	1266
Black	0
Hispanic	52
Asian	74
Other	0
Native American	0

**Age**
From 65 to 74	494
From 75 to 84	474
85 and over	418
Less than 65	46

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2015

Hypertension	75
High Cholesterol	62
Stroke	11
Ischemic Heart Disease	56
Depression	23
Chronic Kidney Disease	36
Asthma	14
Osteoperosis	12
Atrial Fibrilation	26
Heart Failure	32
Chronic Obstructive Pulmonary Disease	18
Diabetes	32
Dementia	19
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2016 were cardiac procedures, ultrasound (sonogram), inpatient care and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	12
angioplasty	58
cardiac procedures	596
catheterization	120
diagnostic procedures	33
doctor visit	1014
hospital care	340
implant surgery	18
inpatient care	340
minimally invasive procedures	138
nuclear scan	32
stent placement (stenting)	58
stress testing	212
ultrasound (sonogram)	384
vascular procedures	46

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	448
Female	527

**Ethnicity**
Non-Hispanic White	840
Black	0
Hispanic	43
Asian	52
Other	28
Native American	0

**Age**
From 65 to 74	336
From 75 to 84	332
85 and over	275
Less than 65	32

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2016

Hypertension	75
High Cholesterol	63
Stroke	11
Ischemic Heart Disease	56
Depression	26
Chronic Kidney Disease	40
Asthma	21
Osteoperosis	12
Atrial Fibrilation	26
Heart Failure	33
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Dementia	20
Cancer	15

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2017 were cardiac procedures, ultrasound (sonogram), inpatient care and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

angioplasty	72
cardiac procedures	482
cardioversion	11
catheterization	143
diagnostic procedures	35
doctor visit	953
hospital care	278
implant surgery	14
inpatient care	278
minimally invasive procedures	157
stent placement (stenting)	72
stress testing	142
ultrasound (sonogram)	338
vascular procedures	48

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	462
Female	459

**Ethnicity**
Non-Hispanic White	786
Black	0
Hispanic	42
Asian	53
Other	0
Native American	0

**Age**
From 65 to 74	315
From 75 to 84	302
85 and over	270
Less than 65	34

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2017

Hypertension	75
High Cholesterol	59
Stroke	12
Ischemic Heart Disease	56
Depression	29
Chronic Kidney Disease	41
Asthma	8
Osteoperosis	13
Atrial Fibrilation	27
Heart Failure	35
Chronic Obstructive Pulmonary Disease	19
Diabetes	32
Dementia	22
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2018 were cardiac procedures, ultrasound (sonogram), inpatient care and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	11
angioplasty	34
cardiac procedures	391
catheterization	76
diagnostic procedures	25
doctor visit	808
hospital care	234
implant surgery	11
inpatient care	234
minimally invasive procedures	87
nuclear scan	13
stent placement (stenting)	34
stress testing	150
ultrasound (sonogram)	267
vascular procedures	25

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	399
Female	408

**Ethnicity**
Non-Hispanic White	698
Black	0
Hispanic	30
Asian	40
Other	0
Native American	0

**Age**
From 65 to 74	271
From 75 to 84	291
85 and over	210
Less than 65	35

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2018

Hypertension	75
High Cholesterol	64
Stroke	10
Ischemic Heart Disease	54
Depression	24
Chronic Kidney Disease	41
Asthma	9
Osteoperosis	11
Atrial Fibrilation	26
Heart Failure	31
Chronic Obstructive Pulmonary Disease	18
Diabetes	31
Dementia	20
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2019 were cardiac procedures, ultrasound (sonogram), inpatient care and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

ambulatory monitoring	13
angioplasty	36
cardiac procedures	416
catheterization	79
diagnostic procedures	25
doctor visit	817
hospital care	201
inpatient care	201
minimally invasive procedures	79
nuclear scan	23
stent placement (stenting)	36
stress testing	188
ultrasound (sonogram)	294
vascular procedures	42

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	374
Female	341

**Ethnicity**
Non-Hispanic White	613
Black	0
Hispanic	29
Asian	39
Other	0
Native American	0

**Age**
From 65 to 74	264
From 75 to 84	251
85 and over	182
Less than 65	18

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2019

Hypertension	75
High Cholesterol	65
Stroke	10
Ischemic Heart Disease	57
Depression	26
Chronic Kidney Disease	41
Asthma	9
Osteoperosis	11
Atrial Fibrilation	24
Heart Failure	31
Chronic Obstructive Pulmonary Disease	17
Diabetes	31
Dementia	18
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2020 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

cardiac procedures	311
catheterization	23
diagnostic procedures	23
doctor visit	693
hospital care	200
inpatient care	200
minimally invasive procedures	23
nuclear scan	18
stress testing	148
ultrasound (sonogram)	252
vascular procedures	23

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	375
Female	322

**Ethnicity**
Non-Hispanic White	601
Black	0
Hispanic	30
Asian	38
Other	0
Native American	0

**Age**
From 65 to 74	258
From 75 to 84	242
85 and over	180
Less than 65	17

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2020

Hypertension	75
High Cholesterol	64
Stroke	9
Ischemic Heart Disease	57
Depression	22
Chronic Kidney Disease	43
Asthma	7
Osteoperosis	11
Atrial Fibrilation	25
Heart Failure	32
Chronic Obstructive Pulmonary Disease	14
Diabetes	29
Dementia	18
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2021 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

angioplasty	40
cardiac procedures	413
catheterization	90
diagnostic procedures	30
doctor visit	810
hospital care	98
inpatient care	98
minimally invasive procedures	90
nuclear scan	26
stent placement (stenting)	40
stress testing	173
ultrasound (sonogram)	271
vascular procedures	30

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	376
Female	318

**Ethnicity**
Non-Hispanic White	594
Black	0
Hispanic	0
Asian	44
Other	30
Native American	0

**Age**
From 65 to 74	259
From 75 to 84	261
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2021

Hypertension	75
High Cholesterol	65
Stroke	9
Ischemic Heart Disease	53
Depression	23
Chronic Kidney Disease	38
Asthma	8
Osteoperosis	10
Atrial Fibrilation	22
Heart Failure	28
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	19
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2022 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

cardiac procedures	302
catheterization	12
diagnostic procedures	12
doctor visit	793
hospital care	61
inpatient care	61
minimally invasive procedures	12
nuclear scan	21
stress testing	168
ultrasound (sonogram)	248
vascular procedures	12

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	305
Female	280

**Ethnicity**
Non-Hispanic White	497
Black	0
Hispanic	0
Asian	31
Other	28
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	233
85 and over	137
Less than 65	11

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	37
Depression	22
Chronic Kidney Disease	28
Asthma	10
Osteoperosis	14
Atrial Fibrilation	32
Heart Failure	22
Chronic Obstructive Pulmonary Disease	14
Diabetes	26
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2023 were cardiac procedures, ultrasound (sonogram), stress testing and minimally invasive procedures.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

angioplasty	26
cardiac procedures	339
catheterization	53
diagnostic procedures	14
doctor visit	837
hospital care	44
inpatient care	44
minimally invasive procedures	53
nuclear scan	18
stent placement (stenting)	26
stress testing	146
ultrasound (sonogram)	250
vascular procedures	14

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	329
Female	219

**Ethnicity**
Non-Hispanic White	469
Black	0
Hispanic	0
Asian	31
Other	23
Native American	0

**Age**
From 65 to 74	167
From 75 to 84	251
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	37
Depression	17
Chronic Kidney Disease	30
Asthma	9
Osteoperosis	13
Atrial Fibrilation	34
Heart Failure	23
Chronic Obstructive Pulmonary Disease	13
Diabetes	29
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA during 2024 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

cardiac procedures	271
doctor visit	813
hospital care	31
inpatient care	31
nuclear scan	11
stress testing	136
ultrasound (sonogram)	239

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	356
Female	261

**Ethnicity**
Non-Hispanic White	523
Black	0
Hispanic	0
Asian	40
Other	28
Native American	0

**Age**
From 65 to 74	203
From 75 to 84	279
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert K. Masters, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	35
Depression	18
Chronic Kidney Disease	30
Asthma	11
Osteoperosis	16
Atrial Fibrilation	36
Heart Failure	24
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Dementia	12
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Robert K. Masters, MD for Medicare patients.

The highest averages for the top procedures that Dr. Robert K. Masters, MD treated as a cardiologist in Laguna Hills, CA were cardiac procedures, ultrasound (sonogram), inpatient care and hospital care.

ambulatory monitoring	17
angioplasty	44
cardiac procedures	407
cardioversion	12
catheterization	73
diagnostic procedures	26
doctor visit	841
hospital care	208
implant surgery	17
inpatient care	208
minimally invasive procedures	83
nuclear scan	21
stent placement (stenting)	43
stress testing	161
ultrasound (sonogram)	283
vascular procedures	33

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Robert K. Masters, MD.

**Gender**
Male	381
Female	360

**Ethnicity**
Black / African American	1
Asian / Pacific Islander	40
Non-Hispanic White	643
Hispanic	22
Native American / Alaskan Native	0
Other	11

**Age**
75 to 84	264
85 and over	171
Less than 65	19
65 to 74	252

Average of Total of Conditions of Medicare patients treated by Dr. Robert K. Masters, MD From 2012 - 2024

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

Hypertension	69
High Cholesterol	60
Stroke	10
Ischemic Heart Disease	47
Depression	21
Chronic Kidney Disease	34
Asthma	9
Osteoporosis	11
Heart Failure	27
Chronic Obstructive Pulmonary Disease	15
Diabetes	28
Atrial Fibrillation	25
Cancer	14
Dementia	15

Education & Training

Dr. Robert K. Masters, MD graduated from University of California, Irvine, School of Medicine in 1972. He completed residency at University of Southern California (USC) Affiliated Hospitals. He has a state license in California.

Medical School: University of California, Irvine, School of Medicine (1972)

Residency: University of Southern California (USC) Affiliated Hospitals (1977)

Licensed In: California

Ratings & Reviews

Dr. Robert K. Masters, MD has a high overall rating with an average of 3.67 out of 5 stars based on 3 ratings. We collect ratings and reviews of Dr. Robert K. Masters, MD from all over the web to help you find the right in Laguna Hills, CA.

3.67

Overall Rating

(3 Ratings)

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General Payments

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

**Payments by Company**
BIOTRONIK INC.	$9,544 Bradycardia products $4,087	BioMonitor $529	Acticor $480	Passeo $475	Eluna $259	Other $3,714
Janssen Pharmaceuticals, Inc	$1,429 XARELTO $1,429
Astellas Pharma US Inc	$1,353 Lexiscan $757	$596
Amgen Inc.	$1,344 Repatha $1,101	Corlanor $189	$53
AOP Health US, LLC	$1,290 Rapiblyk $1,290
Other	$18,341 ELIQUIS $1,499	LifeVest $988	JARDIANCE $862	BRILINTA $641	LEQVIO $629	Other $13,721

**Types of Payments**
Food and Beverage	$32,215
Education	$1,054
Entertainment	$32

Biography

Dr. Robert Masters practices adult cardiology. Dr. Masters graduated from the University of California, Irvine, School of Medicine and then he performed his residency at a hospital affiliated with the University of Southern California (USC). He is affiliated with Saddleback Medical Center.