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Dr. John M. Gemery, MD

(Dr. John Gemery)

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Specializes in: Interventional Radiology/Diagnostic Radiology (IR/DR)

University of Vermont College of Medicine (1992)

Professional interests include: cancer, angiogram (angiography), tumor, and more.

1 Medical Center Drive
Lebanon, NH 03756

(603) 650-4488

Dr. John M. Gemery, MD is a radiologist in Lebanon, NH specializing in interventional radiology/diagnostic radiology (ir/dr). He graduated from University of Vermont College of Medicine in 1992 and has 34 years of experience. Dr. John M. Gemery, MD is affiliated with Dartmouth Health.

Office Locations

Dartmouth Health

1 Medical Center Drive
Lebanon, NH 03756

(603) 650-4488

(603) 650-5455

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Some issues Dr. John M. Gemery, MD can help you with:

Angiogram (Angiography)

Angiography is the use of x-rays to examine blood vessels, especially in order to identify any blocked or misshapen vessels that may cause problems. The test itself is called an angiogram. Some of the disorders that angiograms can be used to diagnose include:

Blockages and narrowing
Weakened walls and bulging, called an aneurysm
Malformations and misshapen blood vessels
Kidney artery conditions
Aorta artery conditions
Vein problems, including deep vein thrombosis (DVT) and blood clots or embolisms

During an angiogram, the doctor inserts a very thin, flexible tube called a catheter into a blood vessel through an opening in the groin or arm. The catheter is threaded through the body to the site of the suspected problem, where a small amount of dye is injected into the bloodstream and x-rays are taken. The dye makes the surrounding blood vessels visible via x-ray.

If necessary, certain procedures can be performed after an angiogram while the catheter is in place. Angioplasty is the use of a catheter to widen narrowed or blocked arteries. Stents are like tiny coiled springs that hold blood vessels open, and they can be placed during a catheterization. Damaged heart valves can also be repaired or replaced.

A typical angiogram takes about an hour to perform, but it may be longer if the catheterization is used to perform procedures on the blood vessels. It may be uncomfortable at times but is usually not painful. Afterwards, patients may be monitored for up to six hours to make sure any bleeding from the insertion site has stopped. They are given fluids to help flush the dye from their body. For a day or two after an angiogram it is important for patients to drink plenty of fluids and keep strenuous activity to a minimum.

Noteworthy Medicare Patient Procedures Performed by Dr. John M. Gemery, MD in 2024

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

Top 10%

By Volume:

biopsy

liver core needle biopsy

needle biopsy

In 2024, Dr. John M. Gemery, MD performed more biopsy, liver core needle biopsy, and needle biopsy procedures for Medicare patients than 90% of providers in related specialties within New Hampshire.

Top 25%

By Volume:

pleural drainage

tunneled central line placement

In 2012, Dr. John M. Gemery, MD performed more pleural drainage, and tunneled central line placement procedures for Medicare patients than 75% of providers in related specialties within New Hampshire.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2012 were vascular procedures, aspiration, catheterization and X-rays.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

angioplasty	31
aspiration	56
catheterization	38
diagnostic procedures	12
dialysis access procedures	37
minimally invasive procedures	12
minor procedures	12
pleural drainage	31
urologic procedures	23
vascular procedures	64
X-rays	37

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2013 were minimally invasive procedures, vascular procedures, catheterization and aspiration.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	15
angioplasty	22
aspiration	56
catheterization	71
diagnostic procedures	18
dialysis access procedures	34
gastrointestinal procedures	15
minimally invasive procedures	90
minor procedures	18
pleural drainage	49
thoracostomy	31
vascular procedures	86
X-rays	34

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	176
Female	148

**Age**
From 65 to 74	121
From 75 to 84	83
85 and over	37
Less than 65	83

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2013

Hypertension	69
High Cholesterol	47
Stroke	8
Ischemic Heart Disease	40
Depression	39
Chronic Kidney Disease	53
Asthma	10
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	33
Chronic Obstructive Pulmonary Disease	27
Diabetes	33
Dementia	11
Cancer	22

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2014 were minimally invasive procedures, aspiration, vascular procedures and catheterization.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	14
angioplasty	20
aspiration	61
catheterization	53
dialysis access procedures	29
gastrointestinal procedures	14
minimally invasive procedures	66
pleural drainage	53
thoracostomy	26
urologic procedures	13
vascular procedures	55
X-rays	29

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	157
Female	142

**Ethnicity**
Non-Hispanic White	283
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	68
85 and over	34
Less than 65	87

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2014

Hypertension	75
High Cholesterol	50
Stroke	6
Ischemic Heart Disease	46
Depression	35
Chronic Kidney Disease	61
Asthma	12
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	37
Chronic Obstructive Pulmonary Disease	25
Diabetes	40
Dementia	14
Cancer	20

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2015 were vascular procedures, catheterization, aspiration and minimally invasive procedures.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

angioplasty	20
aspiration	70
catheterization	75
dialysis access procedures	36
gastrointestinal procedures	15
minimally invasive procedures	62
pleural drainage	61
thoracostomy	27
urologic procedures	12
vascular procedures	84
X-rays	36

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	414
Female	306

**Ethnicity**
Non-Hispanic White	696
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	266
From 75 to 84	186
85 and over	66
Less than 65	202

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2015

Hypertension	68
High Cholesterol	48
Stroke	11
Ischemic Heart Disease	40
Depression	38
Chronic Kidney Disease	55
Asthma	21
Osteoperosis	6
Atrial Fibrilation	21
Heart Failure	33
Chronic Obstructive Pulmonary Disease	26
Diabetes	37
Dementia	14
Cancer	20

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2016 were aspiration, minimally invasive procedures, catheterization and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

ablation	13
anastomosis	26
angioplasty	18
aspiration	138
catheterization	95
device removal	35
dialysis access procedures	23
gastrointestinal procedures	26
image guided procedures	18
minimally invasive procedures	97
pleural drainage	82
removal of lesion (e.g. growth)	13
thoracostomy	40
vascular procedures	41
X-rays	23

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	238
Female	207

**Ethnicity**
Non-Hispanic White	421
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	194
From 75 to 84	119
85 and over	33
Less than 65	99

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2016

Hypertension	75
High Cholesterol	53
Stroke	9
Ischemic Heart Disease	46
Depression	36
Chronic Kidney Disease	59
Asthma	28
Osteoperosis	8
Atrial Fibrilation	20
Heart Failure	38
Chronic Obstructive Pulmonary Disease	25
Diabetes	38
Dementia	15
Cancer	21

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2017 were minimally invasive procedures, catheterization, aspiration and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	18
aspiration	77
catheterization	82
diagnostic procedures	12
doctor visit	20
gastrointestinal procedures	18
image guided procedures	11
minimally invasive procedures	99
minor procedures	12
pleural drainage	68
thoracostomy	32
vascular procedures	56

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	226
Female	204

**Ethnicity**
Non-Hispanic White	407
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	182
From 75 to 84	110
85 and over	30
Less than 65	108

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2017

Hypertension	68
High Cholesterol	43
Stroke	7
Ischemic Heart Disease	42
Depression	34
Chronic Kidney Disease	60
Asthma	10
Osteoperosis	9
Atrial Fibrilation	20
Heart Failure	30
Chronic Obstructive Pulmonary Disease	27
Diabetes	35
Dementia	11
Cancer	23

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2018 were aspiration, minimally invasive procedures, catheterization and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	17
aspiration	81
catheterization	69
diagnostic procedures	14
doctor visit	18
gastrointestinal procedures	17
minimally invasive procedures	72
minor procedures	14
pleural drainage	45
thoracostomy	15
vascular procedures	45

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	212
Female	186

**Ethnicity**
Non-Hispanic White	378
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	178
From 75 to 84	105
85 and over	27
Less than 65	88

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2018

Hypertension	73
High Cholesterol	54
Stroke	7
Ischemic Heart Disease	41
Depression	37
Chronic Kidney Disease	59
Asthma	9
Osteoperosis	9
Atrial Fibrilation	20
Heart Failure	32
Chronic Obstructive Pulmonary Disease	25
Diabetes	37
Dementia	11
Cancer	23

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2019 were aspiration, catheterization, pleural drainage and minimally invasive procedures.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	21
aspiration	93
catheterization	69
diagnostic procedures	12
doctor visit	13
gastrointestinal procedures	21
minimally invasive procedures	61
minor procedures	12
pleural drainage	65
thoracostomy	28

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	219
Female	214

**Ethnicity**
Non-Hispanic White	415
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	194
From 75 to 84	104
85 and over	38
Less than 65	97

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2019

Hypertension	75
High Cholesterol	55
Stroke	9
Ischemic Heart Disease	51
Depression	40
Chronic Kidney Disease	63
Asthma	11
Osteoperosis	7
Atrial Fibrilation	21
Heart Failure	0
Chronic Obstructive Pulmonary Disease	27
Diabetes	42
Dementia	16
Cancer	23

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2020 were aspiration, minimally invasive procedures, catheterization and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	14
aspiration	70
catheterization	46
diagnostic procedures	17
gastrointestinal procedures	25
minimally invasive procedures	53
minor procedures	17
pleural drainage	45
thoracostomy	22

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	194
Female	165

**Ethnicity**
Non-Hispanic White	344
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	144
From 75 to 84	103
85 and over	32
Less than 65	80

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2020

Hypertension	75
High Cholesterol	53
Stroke	10
Ischemic Heart Disease	53
Depression	35
Chronic Kidney Disease	64
Asthma	11
Osteoperosis	11
Atrial Fibrilation	19
Heart Failure	40
Chronic Obstructive Pulmonary Disease	25
Diabetes	44
Dementia	21
Cancer	23

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2021 were minimally invasive procedures, catheterization, aspiration and vascular procedures.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	12
aspiration	38
catheterization	66
diagnostic procedures	15
gastrointestinal procedures	12
minimally invasive procedures	78
minor procedures	15
pleural drainage	27
thoracostomy	27
vascular procedures	38

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	182
Female	152

**Ethnicity**
Non-Hispanic White	316
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	135
From 75 to 84	105
85 and over	27
Less than 65	67

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2021

Hypertension	73
High Cholesterol	60
Stroke	10
Ischemic Heart Disease	48
Depression	36
Chronic Kidney Disease	62
Asthma	11
Osteoperosis	6
Atrial Fibrilation	19
Heart Failure	39
Chronic Obstructive Pulmonary Disease	23
Diabetes	40
Dementia	17
Cancer	22

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2022 were minimally invasive procedures, catheterization, aspiration and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	12
aspiration	43
catheterization	62
diagnostic procedures	17
gastrointestinal procedures	12
minimally invasive procedures	70
minor procedures	17
pleural drainage	32
thoracostomy	17
vascular procedures	24

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	152
Female	150

**Ethnicity**
Non-Hispanic White	285
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	124
From 75 to 84	95
85 and over	26
Less than 65	57

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2022

Hypertension	75
High Cholesterol	65
Stroke	18
Ischemic Heart Disease	33
Depression	36
Chronic Kidney Disease	42
Asthma	13
Osteoperosis	13
Atrial Fibrilation	31
Heart Failure	36
Chronic Obstructive Pulmonary Disease	27
Diabetes	37
Dementia	10
Cancer	33

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2023 were minimally invasive procedures, catheterization, aspiration and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

anastomosis	16
aspiration	38
catheterization	39
device removal	11
diagnostic procedures	19
gastrointestinal procedures	16
image guided procedures	12
minimally invasive procedures	67
minor procedures	19
pleural drainage	36
thoracostomy	20

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	175
Female	176

**Ethnicity**
Non-Hispanic White	325
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	149
From 75 to 84	109
85 and over	42
Less than 65	51

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2023

Hypertension	75
High Cholesterol	63
Stroke	11
Ischemic Heart Disease	32
Depression	32
Chronic Kidney Disease	37
Asthma	9
Osteoperosis	11
Atrial Fibrilation	31
Heart Failure	31
Chronic Obstructive Pulmonary Disease	21
Diabetes	39
Dementia	9
Cancer	31

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH during 2024 were minimally invasive procedures, aspiration, catheterization and pleural drainage.

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

aspiration	36
catheterization	35
diagnostic procedures	25
doctor visit	12
minimally invasive procedures	37
minor procedures	25
pleural drainage	31
thoracostomy	12
vascular procedures	13

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Male	196
Female	182

**Ethnicity**
Non-Hispanic White	351
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	164
From 75 to 84	113
85 and over	34
Less than 65	67

Conditions of Medicare patients treated by Dr. John M. Gemery, MD in 2024

Hypertension	75
High Cholesterol	62
Stroke	12
Ischemic Heart Disease	30
Depression	32
Chronic Kidney Disease	37
Asthma	11
Osteoperosis	13
Atrial Fibrilation	28
Heart Failure	27
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Dementia	10
Cancer	34

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. John M. Gemery, MD for Medicare patients.

The highest averages for the top procedures that Dr. John M. Gemery, MD treated as a radiologist in Lebanon, NH were minimally invasive procedures, aspiration, catheterization and vascular procedures.

ablation	13
anastomosis	16
angioplasty	22
aspiration	65
catheterization	61
device removal	23
diagnostic procedures	16
dialysis access procedures	31
doctor visit	15
gastrointestinal procedures	17
image guided procedures	13
minimally invasive procedures	66
minor procedures	16
pleural drainage	48
removal of lesion (e.g. growth)	13
thoracostomy	24
urologic procedures	16
vascular procedures	50
X-rays	31

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. John M. Gemery, MD.

**Gender**
Female	171
Male	195

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	324
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	32
75 to 84	100
Less than 65	83
65 to 74	150

Average of Total of Conditions of Medicare patients treated by Dr. John M. Gemery, MD From 2012 - 2024

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

Hypertension	67
High Cholesterol	50
Stroke	9
Ischemic Heart Disease	38
Depression	33
Chronic Kidney Disease	50
Asthma	12
Osteoporosis	8
Heart Failure	28
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Atrial Fibrillation	21
Dementia	12
Cancer	22

Education & Training

Dr. John M. Gemery, MD graduated from University of Vermont College of Medicine in 1992. He completed residency at University of Vermont/Fletcher Allen Health Care. He is certified by the Board certification: Diagnostic Radiology and has a state license in New Hampshire.

Medical School: University of Vermont College of Medicine (1992)

Residency: University of Vermont/Fletcher Allen Health Care (1997)

Board Certification: Board certification: Diagnostic Radiology

Licensed In: New Hampshire

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General Payments

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

**Payments by Company**
Biocompatibles, Inc.	$1,667 THERASPHERE - BIO $1,667
Boston Scientific Corporation	$89 EMBOLICS $89
Volcano Corporation	$60 Crux IVC Filter $60

**Types of Payments**
Travel and Lodging	$1,460
Food and Beverage	$356

Biography

Dr. John Gemery's specialty is interventional radiology/diagnostic radiology (IR/DR). He is a graduate of the University of Vermont College of Medicine and a graduate of the University of Vermont/Fletcher Allen Health Care's residency program. Dr. Gemery's areas of expertise include the following: ablation, cancer, and tumor. He has received the following distinction: Top Doctor (named by Castle Connolly, published by New Hampshire Magazine). Dr. Gemery is affiliated with Dartmouth Health.