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Home > ME Providers > Cardiac Surgeons

Dr. John Dean Klemperer, MD

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Specializes in: Cardiac Surgery

417 State Street Suite 421
Bangor, ME 04401

(207) 973-5293

Dr. John Dean Klemperer, MD is a cardiac surgeon in Bangor, ME specializing in cardiac surgery.

Office Locations

417 State Street Suite 421
Bangor, ME 04401

(207) 973-5293

(207) 973-5263

open_in_new

In The News

“"Our goal is to spread awareness of our Program in hopes of enrolling more eligible people who may be at risk of having unrecognized, potentially curable lung cancer," says John Klemperer, MD,...”—"Lung Cancer Awareness Month in November", Bangor Daily News, November 2021

“"Our goal is to spread awareness of our program in hopes of enrolling more eligible people at risk for having unrecognized, potentially curable lung cancer," says John Klemperer, MD, cardiothoracic...”—"Northern Light Health shines spotlight on Lung Cancer Awareness Month", Bangor Daily News, November 2020

“"Tobacco use continues to be the leading cause of lung cancer, and Maine's lung cancer rates are among the highest in the nation," says John Klemperer, MD, cardiothoracic surgeon and director,...”—"Northern Light Eastern Maine Medical Center honored for its commitment to a smoke-free world", Bangor Daily News, November 2020

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2012 were thoracic (chest) surgery procedures, cardiac procedures, open surgery and hospital care.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bypass surgery	43
cardiac procedures	124
dissection	22
doctor visit	113
excision	35
hospital care	62
inpatient care	62
lobectomy	16
lymph node procedures	22
open surgery	102
thoracic (chest) surgery procedures	155

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2013 were thoracic (chest) surgery procedures, cardiac procedures, open surgery and minimally invasive procedures.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bronchoscopy	20
bypass surgery	43
cardiac procedures	146
dissection	36
doctor visit	100
excision	54
hospital care	54
inpatient care	54
lobectomy	12
lymph node procedures	36
minimally invasive procedures	55
open surgery	98
thoracic (chest) surgery procedures	177

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	121
Female	87

**Age**
From 65 to 74	90
From 75 to 84	75
85 and over	13
Less than 65	30

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2013

Hypertension	75
High Cholesterol	74
Stroke	6
Ischemic Heart Disease	74
Depression	29
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	9
Atrial Fibrilation	23
Heart Failure	38
Chronic Obstructive Pulmonary Disease	46
Diabetes	38
Dementia	9
Cancer	35

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2014 were thoracic (chest) surgery procedures, cardiac procedures, open surgery and minimally invasive procedures.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bronchoscopy	31
bypass surgery	58
cardiac procedures	182
dissection	40
doctor visit	157
excision	59
hospital care	65
inpatient care	65
lobectomy	12
lymph node procedures	40
minimally invasive procedures	88
open surgery	116
thoracic (chest) surgery procedures	209

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	147
Female	104

**Age**
From 65 to 74	119
From 75 to 84	86
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2014

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	75
Depression	28
Chronic Kidney Disease	35
Asthma	14
Osteoperosis	0
Atrial Fibrilation	23
Heart Failure	34
Chronic Obstructive Pulmonary Disease	50
Diabetes	42
Dementia	5
Cancer	31

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2015 were thoracic (chest) surgery procedures, minimally invasive procedures, cardiac procedures and excision.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bronchoscopy	43
bypass surgery	28
cardiac procedures	94
dissection	40
doctor visit	166
excision	60
hospital care	44
inpatient care	44
lobectomy	13
lymph node procedures	40
minimally invasive procedures	103
open surgery	56
thoracic (chest) surgery procedures	147

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	276
Female	234

**Age**
From 65 to 74	222
From 75 to 84	164
85 and over	34
Less than 65	90

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2015

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	71
Depression	36
Chronic Kidney Disease	35
Asthma	32
Osteoperosis	13
Atrial Fibrilation	25
Heart Failure	42
Chronic Obstructive Pulmonary Disease	48
Diabetes	41
Dementia	10
Cancer	36

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2016 were thoracic (chest) surgery procedures, cardiac procedures, open surgery and minimally invasive procedures.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bronchoscopy	18
bypass surgery	50
cardiac procedures	186
dissection	53
doctor visit	174
excision	53
hospital care	57
inpatient care	57
lobectomy	41
lymph node procedures	53
minimally invasive procedures	87
open surgery	117
thoracic (chest) surgery procedures	194
vascular procedures	15

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	158
Female	114

**Age**
From 65 to 74	130
From 75 to 84	84
85 and over	14
Less than 65	44

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2016

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	66
Depression	33
Chronic Kidney Disease	39
Asthma	53
Osteoperosis	6
Atrial Fibrilation	26
Heart Failure	33
Chronic Obstructive Pulmonary Disease	49
Diabetes	45
Dementia	7
Cancer	37

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2017 were thoracic (chest) surgery procedures, cardiac procedures, minimally invasive procedures and open surgery.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bronchoscopy	13
bypass surgery	32
cardiac procedures	130
dissection	31
doctor visit	185
excision	53
hospital care	55
inpatient care	55
lobectomy	21
lymph node procedures	31
minimally invasive procedures	100
open surgery	64
thoracic (chest) surgery procedures	138
vascular procedures	13

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	151
Female	116

**Age**
From 65 to 74	120
From 75 to 84	84
85 and over	24
Less than 65	39

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2017

Hypertension	75
High Cholesterol	72
Stroke	8
Ischemic Heart Disease	75
Depression	27
Chronic Kidney Disease	41
Asthma	10
Osteoperosis	10
Atrial Fibrilation	24
Heart Failure	40
Chronic Obstructive Pulmonary Disease	53
Diabetes	39
Dementia	7
Cancer	33

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2018 were cardiac procedures, thoracic (chest) surgery procedures, open surgery and minimally invasive procedures.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bypass surgery	43
cardiac procedures	186
dissection	24
doctor visit	173
excision	38
hospital care	54
inpatient care	54
lobectomy	14
lymph node procedures	24
minimally invasive procedures	84
open surgery	86
thoracic (chest) surgery procedures	138
vascular procedures	32

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	160
Female	116

**Ethnicity**
Non-Hispanic White	265
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	108
From 75 to 84	104
85 and over	30
Less than 65	34

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2018

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	75
Depression	36
Chronic Kidney Disease	51
Asthma	6
Osteoperosis	9
Atrial Fibrilation	30
Heart Failure	47
Chronic Obstructive Pulmonary Disease	42
Diabetes	41
Dementia	16
Cancer	28

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2019 were cardiac procedures, thoracic (chest) surgery procedures, minimally invasive procedures and open surgery.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bypass surgery	28
cardiac procedures	112
dissection	24
doctor visit	135
excision	24
hospital care	38
inpatient care	38
lobectomy	19
lymph node procedures	24
minimally invasive procedures	59
open surgery	56
thoracic (chest) surgery procedures	99
vascular procedures	16

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	119
Female	95

**Age**
From 65 to 74	84
From 75 to 84	80
85 and over	25
Less than 65	25

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	75
Depression	36
Chronic Kidney Disease	51
Asthma	13
Osteoperosis	13
Atrial Fibrilation	32
Heart Failure	49
Chronic Obstructive Pulmonary Disease	52
Diabetes	46
Dementia	14
Cancer	31

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2020 were cardiac procedures, thoracic (chest) surgery procedures, minimally invasive procedures and hospital care.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bypass surgery	16
cardiac procedures	72
dissection	14
doctor visit	61
excision	14
hospital care	33
inpatient care	33
lymph node procedures	14
minimally invasive procedures	34
open surgery	32
thoracic (chest) surgery procedures	46
vascular procedures	20

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	92
Female	72

**Age**
From 65 to 74	64
From 75 to 84	64
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	75
Depression	26
Chronic Kidney Disease	50
Asthma	11
Osteoperosis	10
Atrial Fibrilation	32
Heart Failure	51
Chronic Obstructive Pulmonary Disease	50
Diabetes	41
Dementia	12
Cancer	27

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2021 were cardiac procedures, thoracic (chest) surgery procedures, minimally invasive procedures and open surgery.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

bypass surgery	11
cardiac procedures	50
dissection	14
doctor visit	48
excision	14
hospital care	13
inpatient care	13
lymph node procedures	14
minimally invasive procedures	28
open surgery	22
thoracic (chest) surgery procedures	36
vascular procedures	14

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	59
Female	53

**Age**
From 65 to 74	44
From 75 to 84	39
85 and over	14
Less than 65	15

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	75
Depression	31
Chronic Kidney Disease	48
Asthma	16
Osteoperosis	0
Atrial Fibrilation	29
Heart Failure	45
Chronic Obstructive Pulmonary Disease	41
Diabetes	36
Dementia	11
Cancer	37

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME during 2022 were thoracic (chest) surgery procedures, minimally invasive procedures, excision and dissection.

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

dissection	35
doctor visit	74
excision	46
lobectomy	23
lymph node procedures	35
minimally invasive procedures	69
thoracic (chest) surgery procedures	69

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	74
Female	55

**Age**
From 65 to 74	68
From 75 to 84	40
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	50
Depression	26
Chronic Kidney Disease	24
Asthma	0
Osteoperosis	12
Atrial Fibrilation	34
Heart Failure	30
Chronic Obstructive Pulmonary Disease	53
Diabetes	33
Dementia	0
Cancer	53

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John Dean Klemperer, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Dean Klemperer, MD treated as a cardiac surgeon in Bangor, ME were thoracic (chest) surgery procedures, cardiac procedures, open surgery and minimally invasive procedures.

bronchoscopy	25
bypass surgery	35
cardiac procedures	128
dissection	30
doctor visit	126
excision	40
hospital care	47
inpatient care	47
lobectomy	19
lymph node procedures	30
minimally invasive procedures	70
open surgery	74
thoracic (chest) surgery procedures	128
vascular procedures	18

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Dean Klemperer, MD.

**Gender**
Male	123
Female	95

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	24
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	74
85 and over	14
Less than 65	25
65 to 74	95

Average of Total of Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. John Dean Klemperer, MD treated were high cholesterol, hypertension, ischemic heart disease and chronic obstructive pulmonary disease.

Hypertension	68
High Cholesterol	67
Stroke	6
Ischemic Heart Disease	64
Depression	28
Chronic Kidney Disease	36
Asthma	15
Osteoporosis	7
Heart Failure	37
Chronic Obstructive Pulmonary Disease	44
Diabetes	36
Atrial Fibrillation	25
Dementia	8
Cancer	31

Education & Training

He has a state license in Maine.

Licensed In: Maine

Ratings & Reviews

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General Payments

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

**Payments by Company**
AtriCure, Inc.	$64,916 ATRICLIP LAA EXCLUSION SYSTEM $36,436	EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX $21,542	Cardiovascular $1,584	EPi-Sense Guided Coagulation Device with VisiTrax $1,421	AtriCure AtriClip LAA Exclusion $1,096	Other $2,838
Intuitive Surgical, Inc.	$21,081 Da Vinci Surgical System $12,081	DAVINCI XI $9,000
Edwards Lifesciences Corporation	$2,978 Pericardial Heart Valves $496	MITRIS RESILIA Mitral Valve $482	EDWARDS INTUITY Elite valve system $472	INSPIRIS RESILIA aortic valve $447	KONECT RESILIA $215	Other $866
LivaNova USA, Inc.	$436 Aortic Tissue Valve - Perceval $337	Perceval $99
ABIOMED	$224 Impella $224
Other	$683 Accessories (Structural Intervention) $198	Avalus $142	Structural Heart $127	SURGICEL Family of Absorbable Hemostats $103	Endo GIA $85	Other $29

**Types of Payments**
Consulting Fee	$54,270
Education	$17,502
Travel and Lodging	$10,627
Food and Beverage	$7,920

Biography

Dr. John Klemperer specializes in cardiac surgery. He is professionally affiliated with Eastern Maine Medical Center. He studied medicine at SUNY, University at Buffalo School of Medicine & Biomedical Sciences.

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Dr. John Dean Klemperer, MD

Office Locations

In The News

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. John Dean Klemperer, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Dean Klemperer, 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. John Dean Klemperer, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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