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Home > FL Providers > Cardiac Electrophysiologists

Dr. Dennis Michael Cassidy, MD

Accepting New Patients

(1 Rating)

Specializes in: Cardiac Electrophysiology (Heart Rhythm)

Memorial University of Newfoundland Faculty of Medicine

601 7th Street S Suite 205
Saint Petersburg, FL 33701

(727) 893-6234

Dr. Dennis Michael Cassidy, MD is a cardiac electrophysiologist in Saint Petersburg, FL specializing in cardiac electrophysiology (heart rhythm). He graduated from Memorial University of Newfoundland Faculty of Medicine. Dr. Dennis Michael Cassidy, MD is affiliated with Florida Medical Clinic Orlando Health and Orlando Health Bayfront Hospital.

Office Locations

601 7th Street S Suite 205
Saint Petersburg, FL 33701

(727) 893-6234

(727) 553-7798

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601 7th Street South Suite 205
Saint Petersburg, FL 33701

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Noteworthy Medicare Patient Procedures Performed by Dr. Dennis Michael Cassidy, MD in 2023

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

Top 10%

By Volume:

inpatient hospital care

In 2023, Dr. Dennis Michael Cassidy, MD performed more inpatient hospital care (for patient admitted to hospital) procedures for Medicare patients than 90% of providers in related specialties within Florida.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2012 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	28
cardiac procedures	106
diagnostic procedures	16
doctor visit	411
hospital care	303
implant surgery	40
implantable cardioverter-defibrillator (ICD) replacement	13
inpatient care	303
lab tests	106
minimally invasive procedures	40
ultrasound (sonogram)	22

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2013 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	19
cardiac procedures	102
cardioversion	19
doctor visit	574
hospital care	405
implant surgery	69
implantable cardioverter-defibrillator (ICD) replacement	20
inpatient care	405
lab tests	324
minimally invasive procedures	69
tilt table test	12
ultrasound (sonogram)	14

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	441
Female	376

**Ethnicity**
Non-Hispanic White	757
Black	34
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	200
From 75 to 84	305
85 and over	249
Less than 65	63

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2013

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	71
Depression	24
Chronic Kidney Disease	40
Asthma	8
Osteoperosis	10
Atrial Fibrilation	55
Heart Failure	50
Chronic Obstructive Pulmonary Disease	35
Diabetes	39
Dementia	20
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2014 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	23
cardiac procedures	67
cardioversion	20
doctor visit	538
hospital care	1300
implant surgery	44
implantable cardioverter-defibrillator (ICD) replacement	14
inpatient care	1300
lab tests	100
minimally invasive procedures	44

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	533
Female	580

**Ethnicity**
Non-Hispanic White	986
Black	83
Hispanic	24
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	274
From 75 to 84	416
85 and over	331
Less than 65	92

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2014

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	68
Depression	29
Chronic Kidney Disease	46
Asthma	9
Osteoperosis	11
Atrial Fibrilation	61
Heart Failure	54
Chronic Obstructive Pulmonary Disease	35
Diabetes	39
Dementia	28
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2015 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	28
cardiac procedures	48
doctor visit	561
hospital care	1631
implant surgery	20
inpatient care	1631
lab tests	123
minimally invasive procedures	20

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	1260
Female	1224

**Ethnicity**
Non-Hispanic White	2172
Black	220
Hispanic	50
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	558
From 75 to 84	888
85 and over	828
Less than 65	210

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2015

Hypertension	75
High Cholesterol	75
Stroke	15
Ischemic Heart Disease	65
Depression	28
Chronic Kidney Disease	47
Asthma	20
Osteoperosis	10
Atrial Fibrilation	60
Heart Failure	50
Chronic Obstructive Pulmonary Disease	32
Diabetes	35
Dementia	29
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2016 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	23
cardiac procedures	48
doctor visit	499
hospital care	1682
implant surgery	25
inpatient care	1682
lab tests	113
minimally invasive procedures	25

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	659
Female	655

**Ethnicity**
Non-Hispanic White	1168
Black	91
Hispanic	34
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	348
From 75 to 84	456
85 and over	414
Less than 65	96

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2016

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	64
Depression	28
Chronic Kidney Disease	51
Asthma	36
Osteoperosis	10
Atrial Fibrilation	57
Heart Failure	50
Chronic Obstructive Pulmonary Disease	35
Diabetes	38
Dementia	29
Cancer	15

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2017 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	29
cardiac procedures	59
cardioversion	13
doctor visit	482
hospital care	1596
implant surgery	30
inpatient care	1596
lab tests	80
minimally invasive procedures	30

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	617
Female	618

**Ethnicity**
Non-Hispanic White	1086
Black	92
Hispanic	33
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	314
From 75 to 84	420
85 and over	404
Less than 65	97

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2017

Hypertension	75
High Cholesterol	68
Stroke	16
Ischemic Heart Disease	71
Depression	33
Chronic Kidney Disease	54
Asthma	9
Osteoperosis	9
Atrial Fibrilation	60
Heart Failure	50
Chronic Obstructive Pulmonary Disease	33
Diabetes	39
Dementia	29
Cancer	16

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2018 were hospital care, inpatient care, lab tests and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

ambulatory monitoring	30
cardiac procedures	50
doctor visit	365
hospital care	1492
implant surgery	20
inpatient care	1478
lab tests	74
minimally invasive procedures	20
outpatient care	14

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	596
Female	584

**Ethnicity**
Non-Hispanic White	1032
Black	103
Hispanic	26
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	296
From 75 to 84	420
85 and over	376
Less than 65	88

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2018

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	72
Depression	34
Chronic Kidney Disease	57
Asthma	9
Osteoperosis	10
Atrial Fibrilation	60
Heart Failure	50
Chronic Obstructive Pulmonary Disease	35
Diabetes	37
Dementia	30
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2019 were hospital care and inpatient care.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

hospital care	333
inpatient care	333

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	89
Female	53

**Ethnicity**
Non-Hispanic White	98
Black	24
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	49
From 75 to 84	41
85 and over	17
Less than 65	35

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	22
Ischemic Heart Disease	75
Depression	38
Chronic Kidney Disease	73
Asthma	11
Osteoperosis	11
Atrial Fibrilation	61
Heart Failure	75
Chronic Obstructive Pulmonary Disease	32
Diabetes	44
Dementia	23
Cancer	14

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2020 were hospital care, inpatient care, cardiac procedures and stress testing.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

cardiac procedures	98
hospital care	954
implant surgery	11
inpatient care	954
minimally invasive procedures	11
stress testing	87

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	250
Female	182

**Ethnicity**
Non-Hispanic White	319
Black	61
Hispanic	37
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	195
From 75 to 84	110
85 and over	53
Less than 65	74

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	15
Ischemic Heart Disease	75
Depression	41
Chronic Kidney Disease	68
Asthma	13
Osteoperosis	9
Atrial Fibrilation	57
Heart Failure	61
Chronic Obstructive Pulmonary Disease	35
Diabetes	49
Dementia	25
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2021 were hospital care, inpatient care, stress testing and cardiac procedures.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

cardiac procedures	64
hospital care	788
inpatient care	788
stress testing	64

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	299
Female	262

**Ethnicity**
Non-Hispanic White	431
Black	73
Hispanic	35
Asian	11
Other	11
Native American	0

**Age**
From 65 to 74	218
From 75 to 84	192
85 and over	77
Less than 65	74

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	21
Ischemic Heart Disease	75
Depression	35
Chronic Kidney Disease	61
Asthma	12
Osteoperosis	13
Atrial Fibrilation	51
Heart Failure	55
Chronic Obstructive Pulmonary Disease	28
Diabetes	45
Dementia	25
Cancer	17

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL during 2022 were hospital care, inpatient care, minimally invasive procedures and implant surgery.

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

cardiac procedures	11
doctor visit	221
hospital care	880
implant surgery	11
inpatient care	880
minimally invasive procedures	11

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	230
Female	204

**Ethnicity**
Non-Hispanic White	369
Black	48
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	134
From 75 to 84	155
85 and over	122
Less than 65	23

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	31
Ischemic Heart Disease	44
Depression	33
Chronic Kidney Disease	42
Asthma	12
Osteoperosis	15
Atrial Fibrilation	69
Heart Failure	44
Chronic Obstructive Pulmonary Disease	36
Diabetes	37
Dementia	26
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Dennis Michael Cassidy, MD for Medicare patients.

The highest averages for the top procedures that Dr. Dennis Michael Cassidy, MD treated as a cardiac electrophysiologist in Saint Petersburg, FL were hospital care, inpatient care, lab tests and stress testing.

ambulatory monitoring	25
cardiac procedures	65
cardioversion	17
diagnostic procedures	16
doctor visit	456
hospital care	1033
implant surgery	30
implantable cardioverter-defibrillator (ICD) replacement	15
inpatient care	1031
lab tests	131
minimally invasive procedures	30
outpatient care	14
stress testing	75
ultrasound (sonogram)	18

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Dennis Michael Cassidy, MD.

**Gender**
Male	452
Female	430

**Ethnicity**
Black / African American	75
Asian / Pacific Islander	1
Non-Hispanic White	765
Native American / Alaskan Native	0
Hispanic	21
Other	1

**Age**
75 to 84	309
85 and over	261
Less than 65	77
65 to 74	235

Average of Total of Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD From 2012 - 2022

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

Hypertension	68
High Cholesterol	67
Stroke	15
Ischemic Heart Disease	61
Depression	29
Chronic Kidney Disease	49
Asthma	12
Osteoporosis	9
Heart Failure	49
Chronic Obstructive Pulmonary Disease	30
Diabetes	36
Atrial Fibrillation	53
Dementia	24
Cancer	14

Education & Training

Dr. Dennis Michael Cassidy, MD graduated from Memorial University of Newfoundland Faculty of Medicine. He completed residency at Memorial University of Newfoundland Affiliated Hospitals. He has a state license in Florida.

Medical School: Memorial University of Newfoundland Faculty of Medicine

Residency: Memorial University of Newfoundland Affiliated Hospitals

Licensed In: Florida

Affiliations & Hospitals

Dr. Dennis Michael Cassidy, MD is associated with these hospitals and organizations:

Florida Medical Clinic Orlando Health

Orlando Health Bayfront Hospital

Ratings & Reviews

Dr. Dennis Michael Cassidy, 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. Dennis Michael Cassidy, MD from all over the web to help you find the right in Saint Petersburg, FL.

Overall Rating

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General Payments

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

**Payments by Company**
BIOTRONIK INC.	$4,051 Bradycardia products $1,609	Passeo $689	Astron $250	Etrinsa $129	Eluna $70	Other $1,304
Medtronic Vascular, Inc.	$1,328 Cardiac Resynchronization Therapy - CRT $424	Pacemakers $322	Patient Management - Data Connectivity Solutions $130	Viva $121	Advisa $96	Other $235
St. Jude Medical, Inc.	$1,177 CRM $804	Electrophysiology $205	Unify Assura $168
Boston Scientific Corporation	$1,069 Tachy System $229	Brady System $179	WATCHMAN $124	TACHY HF $103	TACHY GENERATOR $90	Other $343
Abbott Laboratories	$702 Pacemakers $180	ICDs $161	Fortify Assura, Ellipse ICD $132	Allure Quadra RF CRT Pacemaker $132	Ensite Cardiac Mapping System $69	Other $28
Other	$2,409 XARELTO $372	ELIQUIS $284	Micra $263	LifeVest $244	NORTHERA $232	Other $1,015

**Types of Payments**
Food and Beverage	$9,975
Travel and Lodging	$675
Education	$86

Biography

Dr. Dennis Cassidy works as a cardiac electrophysiology (heart rhythm). His education and training includes medical school at Memorial University of Newfoundland Faculty of Medicine and residency at a hospital affiliated with Memorial University of Newfoundland and a hospital affiliated with the University of Toronto. Dr. Cassidy has received the distinction of The Guillermo B. Cintron Award for Excellence in Cardiology Teaching. He is affiliated with Florida Medical Clinic Orlando Health and Orlando Health Bayfront Hospital. Florida Medical Clinic Orlando Health reports that Dr. Cassidy is accepting new patients at his office in St. Petersburg, FL.

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Dr. Dennis Michael Cassidy, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Dennis Michael Cassidy, MD 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. Dennis Michael Cassidy, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Dennis Michael Cassidy, MD 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. Dennis Michael Cassidy, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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