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Home > NH Providers > Cardiac Electrophysiologists

Dr. Michael J. Mazzini, MD

(Michael Mazzini, MD)

(50 Ratings)

Specializes in: Cardiac Electrophysiology (Heart Rhythm)

University of Colorado Denver School of Medicine

Professional interests include: cardiac electrophysiological study, implantable cardioverter-defibrillator (ICD), arrhythmias (irregular heartbeats), and more.

55 Fruit Street Gray Bigelow 109
Boston, MA 02109

(617) 726-5067

Dr. Michael J. Mazzini, MD is a cardiac electrophysiologist in Dover, NH specializing in cardiac electrophysiology (heart rhythm). He graduated from University of Colorado Denver School of Medicine. Dr. Michael J. Mazzini, MD is affiliated with Wentworth-Douglass Hospital, Massachusetts General Hospital and Wentworth Health Partners Cardiology.

Office Locations

19 Old Rollinsford Road Building B
Dover, NH 03820

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55 Fruit Street
Boston, MA 02114

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67 Corporate Drive Suite 200
Portsmouth, NH 03801

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Wentworth-Douglass Hospital

55 Fruit Street Gray Bigelow 109
Boston, MA 02109

(617) 726-5067

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Some issues Dr. Michael J. Mazzini, MD can help you with:

Cardiac Resynchronization Therapy (CRT)

A cardiac resynchronization therapy device, also known as a CRT or biventricular pacemaker, is a kind of pacemaker that can help the heart work more effectively. In certain kinds of heart failure, the ventricles, or larger chambers in the heart, stop working together. When they are no longer in synch, the heart can't pump enough blood to meet the body's needs. CRT can help keep the heartbeat regular and the ventricles contracting at the same time.

Just as with a standard pacemaker, a biventricular pacemaker consists of a small battery pack and electrical leads, or small wires that conduct electricity to the heart. CRT pacemakers have two or three leads, placed in the upper and lower chambers of the heart. The device measures the contractions of the heart, and if the heart begins to beat out of time it will send small, rhythmic pulses of electricity to resynchronize (hence the name 'cardiac resynchronization therapy) the contractions. This allows the heart to pump blood to the rest of the body more efficiently. Sometimes a CRT is combined with a different kind of device called an implantable cardioverter-defibrillator or ICD, which uses a higher burst of energy to restart the heart if it stops suddenly.

When a biventricular pacemaker is inserted, the wire leads are usually placed via a small incision near the shoulder, then threaded through a vein to the heart. The battery pack is placed under the skin of the chest near the collarbone. Once everything is in place, the leads are connected to the battery, and the CRT can begin helping the heart beat correctly.

It is normal to experience swelling and discomfort as the incisions from surgery heal. It takes time for the heart to adjust to the pacemaker, so vigorous activity should be kept to a minimum for the first few weeks. Strong magnetic fields may affect how the CRT functions, so patients may be advised to avoid them. As patients heart begins to pump blood more effectively, they should soon begin to feel stronger and less fatigued.

Noteworthy Medicare Patient Procedures Performed by Dr. Michael J. Mazzini, MD in 2023

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

spectral Doppler echocardiography

In 2023, Dr. Michael J. Mazzini, MD had a list price for cardiac imaging, color Doppler echocardiography, Doppler echocardiography, and spectral Doppler echocardiography that was lower than the list prices billed to Medicare by 95% of providers in related specialties within New Hampshire. 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:

echocardiogram

transthoracic echocardiography

In 2012, Dr. Michael J. Mazzini, MD had a list price for echocardiogram (echo), and transthoracic echocardiography (TTE) that was lower than the list prices billed to Medicare by 75% of providers in related specialties within New Hampshire. 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. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

doctor visit	42
hospital care	110
inpatient care	110

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2013 were hospital care, inpatient care, cardiac procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ambulatory monitoring	19
cardiac procedures	83
doctor visit	190
hospital care	104
inpatient care	90
outpatient care	14
ultrasound (sonogram)	64

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	431
Female	490

**Ethnicity**
Non-Hispanic White	754
Black	112
Hispanic	29
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	281
From 75 to 84	295
85 and over	186
Less than 65	159

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	57
Depression	34
Chronic Kidney Disease	39
Asthma	15
Osteoperosis	11
Atrial Fibrilation	31
Heart Failure	49
Chronic Obstructive Pulmonary Disease	27
Diabetes	42
Dementia	18
Cancer	14

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2014 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ambulatory monitoring	27
cardiac procedures	264
doctor visit	692
hospital care	191
implant surgery	12
inpatient care	174
lab tests	150
minimally invasive procedures	12
outpatient care	17
stress testing	45
ultrasound (sonogram)	208

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	628
Female	818

**Ethnicity**
Non-Hispanic White	1366
Black	31
Hispanic	19
Asian	0
Other	17
Native American	0

**Age**
From 65 to 74	420
From 75 to 84	463
85 and over	373
Less than 65	190

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2014

Hypertension	75
High Cholesterol	68
Stroke	9
Ischemic Heart Disease	52
Depression	34
Chronic Kidney Disease	42
Asthma	12
Osteoperosis	15
Atrial Fibrilation	31
Heart Failure	42
Chronic Obstructive Pulmonary Disease	27
Diabetes	38
Dementia	21
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2015 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ablation	14
ambulatory monitoring	22
cardiac procedures	255
catheterization	14
diagnostic procedures	14
doctor visit	783
hospital care	176
implant surgery	26
implantable cardioverter-defibrillator (ICD) replacement	15
inpatient care	162
lab tests	155
minimally invasive procedures	54
outpatient care	14
stress testing	18
ultrasound (sonogram)	193

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	1322
Female	1664

**Ethnicity**
Non-Hispanic White	2770
Black	72
Hispanic	64
Asian	46
Other	34
Native American	0

**Age**
From 65 to 74	828
From 75 to 84	992
85 and over	812
Less than 65	354

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2015

Hypertension	75
High Cholesterol	69
Stroke	9
Ischemic Heart Disease	55
Depression	32
Chronic Kidney Disease	45
Asthma	22
Osteoperosis	14
Atrial Fibrilation	33
Heart Failure	46
Chronic Obstructive Pulmonary Disease	27
Diabetes	38
Dementia	23
Cancer	16

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2016 were cardiac procedures, lab tests, ultrasound (sonogram) and hospital care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ablation	33
ambulatory monitoring	17
cardiac procedures	235
catheterization	33
diagnostic procedures	33
doctor visit	929
hospital care	130
implant surgery	22
inpatient care	117
lab tests	156
minimally invasive procedures	88
outpatient care	13
stress testing	14
ultrasound (sonogram)	149

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	766
Female	850

**Ethnicity**
Non-Hispanic White	1531
Black	0
Hispanic	24
Asian	20
Other	23
Native American	0

**Age**
From 65 to 74	475
From 75 to 84	536
85 and over	399
Less than 65	206

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2016

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	53
Depression	33
Chronic Kidney Disease	48
Asthma	31
Osteoperosis	12
Atrial Fibrilation	34
Heart Failure	43
Chronic Obstructive Pulmonary Disease	27
Diabetes	38
Dementia	22
Cancer	15

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2017 were cardiac procedures, ultrasound (sonogram), hospital care and lab tests.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ablation	15
ambulatory monitoring	21
cardiac procedures	228
catheterization	15
diagnostic procedures	15
doctor visit	682
hospital care	117
implant surgery	28
inpatient care	105
lab tests	112
minimally invasive procedures	58
outpatient care	12
stress testing	13
ultrasound (sonogram)	151

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	795
Female	962

**Ethnicity**
Non-Hispanic White	1647
Black	27
Hispanic	27
Asian	0
Other	33
Native American	0

**Age**
From 65 to 74	508
From 75 to 84	556
85 and over	502
Less than 65	191

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2017

Hypertension	75
High Cholesterol	60
Stroke	10
Ischemic Heart Disease	54
Depression	35
Chronic Kidney Disease	51
Asthma	11
Osteoperosis	12
Atrial Fibrilation	33
Heart Failure	42
Chronic Obstructive Pulmonary Disease	27
Diabetes	36
Dementia	24
Cancer	16

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2018 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

cardiac procedures	178
doctor visit	655
hospital care	111
implant surgery	24
inpatient care	99
lab tests	86
minimally invasive procedures	24
ultrasound (sonogram)	154

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	828
Female	870

**Ethnicity**
Non-Hispanic White	1595
Black	30
Hispanic	20
Asian	27
Other	26
Native American	0

**Age**
From 65 to 74	498
From 75 to 84	566
85 and over	473
Less than 65	161

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2018

Hypertension	75
High Cholesterol	71
Stroke	10
Ischemic Heart Disease	56
Depression	37
Chronic Kidney Disease	52
Asthma	12
Osteoperosis	13
Atrial Fibrilation	34
Heart Failure	46
Chronic Obstructive Pulmonary Disease	27
Diabetes	0
Dementia	25
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2019 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ambulatory monitoring	16
cardiac procedures	171
doctor visit	654
hospital care	95
implant surgery	23
implantable cardioverter-defibrillator (ICD) replacement	12
inpatient care	95
minimally invasive procedures	23
ultrasound (sonogram)	132

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	812
Female	967

**Ethnicity**
Non-Hispanic White	1656
Black	31
Hispanic	37
Asian	28
Other	27
Native American	0

**Age**
From 65 to 74	495
From 75 to 84	622
85 and over	493
Less than 65	169

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2019

Hypertension	75
High Cholesterol	71
Stroke	11
Ischemic Heart Disease	55
Depression	39
Chronic Kidney Disease	55
Asthma	12
Osteoperosis	14
Atrial Fibrilation	34
Heart Failure	45
Chronic Obstructive Pulmonary Disease	25
Diabetes	38
Dementia	27
Cancer	14

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2020 were hospital care, inpatient care, cardiac procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

cardiac procedures	41
doctor visit	195
hospital care	57
implant surgery	13
inpatient care	57
minimally invasive procedures	13
ultrasound (sonogram)	28

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	816
Female	828

**Ethnicity**
Non-Hispanic White	1564
Black	0
Hispanic	0
Asian	15
Other	47
Native American	0

**Age**
From 65 to 74	541
From 75 to 84	567
85 and over	333
Less than 65	203

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2020

Hypertension	75
High Cholesterol	67
Stroke	7
Ischemic Heart Disease	53
Depression	33
Chronic Kidney Disease	41
Asthma	8
Osteoperosis	7
Atrial Fibrilation	33
Heart Failure	38
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Dementia	18
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2021 were cardiac procedures, minimally invasive procedures, ultrasound (sonogram) and hospital care.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ablation	14
cardiac procedures	94
catheterization	14
diagnostic procedures	14
doctor visit	410
hospital care	45
implant surgery	25
implantable cardioverter-defibrillator (ICD) replacement	11
inpatient care	45
minimally invasive procedures	72
ultrasound (sonogram)	55

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	873
Female	895

**Ethnicity**
Non-Hispanic White	1691
Black	12
Hispanic	0
Asian	0
Other	49
Native American	0

**Age**
From 65 to 74	589
From 75 to 84	652
85 and over	367
Less than 65	160

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2021

Hypertension	75
High Cholesterol	69
Stroke	8
Ischemic Heart Disease	53
Depression	30
Chronic Kidney Disease	40
Asthma	8
Osteoperosis	8
Atrial Fibrilation	37
Heart Failure	37
Chronic Obstructive Pulmonary Disease	18
Diabetes	32
Dementia	16
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH during 2022 were minimally invasive procedures, cardiac procedures, catheterization and ablation.

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

ablation	36
cardiac procedures	50
catheterization	36
diagnostic procedures	36
doctor visit	509
implant surgery	14
minimally invasive procedures	86

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	780
Female	724

**Ethnicity**
Non-Hispanic White	1440
Black	0
Hispanic	0
Asian	0
Other	43
Native American	0

**Age**
From 65 to 74	524
From 75 to 84	590
85 and over	304
Less than 65	86

Conditions of Medicare patients treated by Dr. Michael J. Mazzini, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	43
Depression	26
Chronic Kidney Disease	28
Asthma	10
Osteoperosis	11
Atrial Fibrilation	52
Heart Failure	35
Chronic Obstructive Pulmonary Disease	21
Diabetes	30
Dementia	12
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Michael J. Mazzini, MD for Medicare patients.

The highest averages for the top procedures that Dr. Michael J. Mazzini, MD treated as a cardiac electrophysiologist in Dover, NH were cardiac procedures, lab tests, ultrasound (sonogram) and hospital care.

ablation	22
ambulatory monitoring	20
cardiac procedures	159
catheterization	22
diagnostic procedures	22
doctor visit	521
hospital care	113
implant surgery	20
implantable cardioverter-defibrillator (ICD) replacement	12
inpatient care	105
lab tests	131
minimally invasive procedures	47
outpatient care	14
stress testing	22
ultrasound (sonogram)	126

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Michael J. Mazzini, MD.

**Gender**
Male	731
Female	824

**Ethnicity**
Black / African American	28
Asian / Pacific Islander	12
Non-Hispanic White	1455
Native American / Alaskan Native	0
Hispanic	20
Other	27

**Age**
75 to 84	530
85 and over	385
Less than 65	170
65 to 74	469

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

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

Hypertension	68
High Cholesterol	62
Stroke	8
Ischemic Heart Disease	48
Depression	30
Chronic Kidney Disease	40
Asthma	12
Osteoporosis	10
Heart Failure	38
Chronic Obstructive Pulmonary Disease	22
Diabetes	29
Atrial Fibrillation	32
Dementia	18
Cancer	14

Education & Training

Dr. Michael J. Mazzini, MD graduated from University of Colorado Denver School of Medicine. He completed residency at Brigham and Women's Hospital. He is certified by the Cardiovascular Disease, American Board of Internal Medicine and has a state license in Massachusetts.

Medical School: University of Colorado Denver School of Medicine

Residency: Brigham and Women's Hospital

Board Certification: Cardiovascular Disease, American Board of Internal Medicine

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Michael J. Mazzini, MD is associated with these hospitals and organizations:

Wentworth-Douglass Hospital

Massachusetts General Hospital

Wentworth Health Partners Cardiology

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Michael J. Mazzini, MD appears to accept the following insurance providers: Harvard Pilgrim Health Care, MultiPlan, United Healthcare, Tufts Health Plan, Aetna, TRICARE, Medicare, Medicaid, Humana, Railroad Medicare, Coventry, Cigna, Blue California, Beech Street, WellPoint, Medicare ACO, WellSense, Senior Whole Health, Fallon Health, Commonwealth Care Alliance, Blue Cross Blue Shield Medicare, Mass General Brigham Health Plan, Maine Community Health Options, MassHealth and WellSense NH.

Insurance Accepted by Provider includes:

According to our sources, Dr. Michael J. Mazzini, MD accepts the following insurance providers:

Harvard Pilgrim Health Care

MultiPlan

United Healthcare

Tufts Health Plan

Aetna

TRICARE

Medicare

Medicaid

Humana

Railroad Medicare

Coventry

Cigna

Blue California

Beech Street

WellPoint

Medicare ACO

WellSense

Senior Whole Health

Fallon Health

Commonwealth Care Alliance

Blue Cross Blue Shield Medicare

Mass General Brigham Health Plan

Maine Community Health Options

MassHealth

WellSense NH

Ratings & Reviews

Dr. Michael J. Mazzini, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 50 ratings. We collect ratings and reviews of Dr. Michael J. Mazzini, MD from all over the web to help you find the right in Dover, NH.

Overall Rating

(50 Ratings)

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General Payments

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

**Payments by Company**
BIOTRONIK INC.	$6,954 $6,954
Abbott Laboratories	$4,627 Confirm Rx $3,330	AVEIR $1,188	Allure Quadra RF CRT Pacemaker $27	Accent $23	Allure CRT Pacemaker $23	Other $36
Medtronic USA, Inc.	$1,100 PlasmaBlade $1,100
Biosense Webster, Inc.	$534 Ablation Catheters#Accessories $534
St. Jude Medical, Inc.	$132 Electrophysiology $132
Other	$155 Advisa $110	Niobe $24	Cinryze $21

**Types of Payments**
Consulting Fee	$4,430
Compensation for serving as faculty or as a speaker for a non-accredited and noncertified continuing education program	$4,000
Travel and Lodging	$3,692
Food and Beverage	$1,171
Education	$208

Biography

Dr. Michael Mazzini's area of specialization is cardiac electrophysiology (heart rhythm). Dr. Mazzini's areas of expertise include the following: arrhythmogenic right ventricular cardiomyopathy, cardiac resynchronization therapy (CRT), and implantable cardioverter-defibrillator (ICD). His hospital/clinic affiliations include Wentworth-Douglass Hospital and Massachusetts General Hospital. After attending the University of Colorado Denver School of Medicine, he completed his residency training at Brigham and Women's Hospital. Dr. Mazzini's average patient rating is 5.0 stars (out of 5). He can accept Blue California, Coventry, and Viant, as well as other insurance carriers.