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Dr. Gregory J. Gagnon, MD

Accepting New Patients

(Gregory Gagnon)

(No ratings)

Specializes in: Radiation Oncology

University of Virginia School of Medicine

Professional interests include: cancer, radiation therapy

1562 Opossumtown Pike Null
Frederick, MD 21702

(301) 662-8477

Dr. Gregory J. Gagnon, MD is a radiation oncologist in Hagerstown, MD specializing in radiation oncology. He graduated from University of Virginia School of Medicine. Dr. Gregory J. Gagnon, MD is affiliated with Meritus Health, Frederick Health, FREDERICK HEALTH HOSPITAL INC and GAGNON ONCOLOGY LLC.

Office Locations

Meritus Health

11116 Medical Campus Road Suite 129
Hagerstown, MD 21742

(301) 665-4650

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Frederick Health

1562 Opossumtown Pike Null
Frederick, MD 21702

(301) 662-8477

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Noteworthy Medicare Patient Procedures Performed by Dr. Gregory J. Gagnon, MD in 2023

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

Top 5%

By Volume:

stereotactic body radiation therapy

By Affordability:

conventional external beam radiation therapy

marker placement for prostate radiation therapy

stereotactic body radiation therapy

stereotactic radiosurgery

In 2023, among providers in related specialties within Maryland, Dr. Gregory J. Gagnon, MD performed more stereotactic body radiation therapy (SBRT) procedures for Medicare patients than 95% of them and he also had a list price for conventional external beam radiation therapy, marker placement for prostate radiation therapy, stereotactic body radiation therapy (SBRT), and stereotactic radiosurgery (SRS) that was lower than the list prices billed to Medicare by 95% of them. 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 Volume:

radiation therapy

In 2023, Dr. Gregory J. Gagnon, MD performed more radiation therapy procedures for Medicare patients than 90% of providers in related specialties within Maryland.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2012 were radiation therapy, hospital care and inpatient care.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1423
hospital care	25
inpatient care	25
radiation therapy	89

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2013 were radiation therapy, hospital care and inpatient care.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1187
hospital care	11
inpatient care	11
radiation therapy	100

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	305
Female	175

**Ethnicity**
Non-Hispanic White	433
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	240
From 75 to 84	176
85 and over	42
Less than 65	22

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	6
Ischemic Heart Disease	53
Depression	20
Chronic Kidney Disease	24
Asthma	9
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	16
Chronic Obstructive Pulmonary Disease	25
Diabetes	33
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2014 were radiation therapy, minimally invasive procedures, laryngeal (voice box) procedures and hospital care.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	993
hospital care	12
inpatient care	12
laryngeal (voice box) procedures	15
minimally invasive procedures	15
radiation therapy	79

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	279
Female	174

**Ethnicity**
Non-Hispanic White	400
Black	38
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	221
From 75 to 84	163
85 and over	41
Less than 65	28

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2014

Hypertension	75
High Cholesterol	67
Stroke	6
Ischemic Heart Disease	47
Depression	23
Chronic Kidney Disease	26
Asthma	8
Osteoperosis	5
Atrial Fibrilation	14
Heart Failure	17
Chronic Obstructive Pulmonary Disease	22
Diabetes	35
Dementia	8
Cancer	72

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2015 were radiation therapy, minimally invasive procedures and laryngeal (voice box) procedures.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1249
laryngeal (voice box) procedures	22
minimally invasive procedures	22
radiation therapy	99

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	660
Female	388

**Ethnicity**
Non-Hispanic White	922
Black	102
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	512
From 75 to 84	370
85 and over	106
Less than 65	60

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2015

Hypertension	74
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	44
Depression	22
Chronic Kidney Disease	25
Asthma	14
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	12
Chronic Obstructive Pulmonary Disease	25
Diabetes	35
Dementia	8
Cancer	74

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2016 were radiation therapy and image guided procedures.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1180
image guided procedures	139
radiation therapy	1302

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	316
Female	203

**Ethnicity**
Non-Hispanic White	465
Black	40
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	262
From 75 to 84	178
85 and over	50
Less than 65	29

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2016

Hypertension	75
High Cholesterol	64
Stroke	5
Ischemic Heart Disease	45
Depression	19
Chronic Kidney Disease	33
Asthma	27
Osteoperosis	6
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	26
Diabetes	36
Dementia	10
Cancer	73

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2017 were radiation therapy and image guided procedures.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1167
image guided procedures	267
radiation therapy	1638

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	320
Female	132

**Ethnicity**
Non-Hispanic White	399
Black	38
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	224
From 75 to 84	154
85 and over	51
Less than 65	23

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2017

Hypertension	75
High Cholesterol	53
Stroke	6
Ischemic Heart Disease	44
Depression	20
Chronic Kidney Disease	34
Asthma	6
Osteoperosis	4
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	26
Diabetes	33
Dementia	11
Cancer	73

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2018 were radiation therapy, image guided procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1048
hospital care	12
image guided procedures	217
inpatient care	12
radiation therapy	1165

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	330
Female	172

**Ethnicity**
Non-Hispanic White	442
Black	44
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	245
From 75 to 84	196
85 and over	49
Less than 65	12

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2018

Hypertension	75
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	46
Depression	24
Chronic Kidney Disease	34
Asthma	5
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	16
Chronic Obstructive Pulmonary Disease	25
Diabetes	35
Dementia	10
Cancer	74

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2019 were radiation therapy, image guided procedures and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1094
image guided procedures	339
marker placement for prostate radiation therapy	24
radiation therapy	1424

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	328
Female	188

**Ethnicity**
Non-Hispanic White	455
Black	43
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	265
From 75 to 84	171
85 and over	50
Less than 65	30

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2019

Hypertension	75
High Cholesterol	70
Stroke	4
Ischemic Heart Disease	47
Depression	28
Chronic Kidney Disease	34
Asthma	6
Osteoperosis	7
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	23
Diabetes	37
Dementia	11
Cancer	74

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2020 were radiation therapy, image guided procedures and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1050
image guided procedures	331
marker placement for prostate radiation therapy	22
radiation therapy	1322

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	315
Female	172

**Ethnicity**
Non-Hispanic White	427
Black	35
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	252
From 75 to 84	165
85 and over	43
Less than 65	27

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2020

Hypertension	70
High Cholesterol	66
Stroke	6
Ischemic Heart Disease	49
Depression	24
Chronic Kidney Disease	35
Asthma	6
Osteoperosis	6
Atrial Fibrilation	12
Heart Failure	14
Chronic Obstructive Pulmonary Disease	23
Diabetes	31
Dementia	9
Cancer	75

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2021 were radiation therapy, image guided procedures and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1098
image guided procedures	328
marker placement for prostate radiation therapy	38
radiation therapy	1107

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	315
Female	198

**Ethnicity**
Non-Hispanic White	452
Black	37
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	253
From 75 to 84	178
85 and over	52
Less than 65	30

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2021

Hypertension	75
High Cholesterol	68
Stroke	4
Ischemic Heart Disease	46
Depression	23
Chronic Kidney Disease	36
Asthma	6
Osteoperosis	7
Atrial Fibrilation	16
Heart Failure	17
Chronic Obstructive Pulmonary Disease	20
Diabetes	30
Dementia	9
Cancer	75

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD during 2022 were radiation therapy, image guided procedures and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

doctor visit	1128
image guided procedures	354
marker placement for prostate radiation therapy	32
radiation therapy	1212

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	311
Female	195

**Ethnicity**
Non-Hispanic White	440
Black	34
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	245
From 75 to 84	188
85 and over	50
Less than 65	23

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	37
Depression	21
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	10
Atrial Fibrilation	19
Heart Failure	13
Chronic Obstructive Pulmonary Disease	20
Diabetes	32
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Gregory J. Gagnon, MD for Medicare patients.

The highest averages for the top procedures that Dr. Gregory J. Gagnon, MD treated as a radiation oncologist in Hagerstown, MD were radiation therapy, image guided procedures, minimally invasive procedures and laryngeal (voice box) procedures.

doctor visit	1147
hospital care	15
image guided procedures	282
inpatient care	15
laryngeal (voice box) procedures	18
minimally invasive procedures	18
radiation therapy	867

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Gregory J. Gagnon, MD.

**Gender**
Male	316
Female	181

**Ethnicity**
Black / African American	37
Asian / Pacific Islander	0
Non-Hispanic White	439
Native American / Alaskan Native	0
Hispanic	1
Other	1

**Age**
75 to 84	176
85 and over	48
Less than 65	25
65 to 74	247

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

The highest averages of the most common conditions of Medicare patients that Dr. Gregory J. Gagnon, MD treated were hypertension, cancer, high cholesterol and ischemic heart disease.

Hypertension	67
High Cholesterol	60
Stroke	5
Ischemic Heart Disease	41
Depression	20
Chronic Kidney Disease	27
Asthma	8
Osteoporosis	6
Heart Failure	13
Chronic Obstructive Pulmonary Disease	21
Diabetes	30
Atrial Fibrillation	13
Dementia	8
Cancer	67

Education & Training

Dr. Gregory J. Gagnon, MD graduated from University of Virginia School of Medicine. He completed residency at Georgetown University Hospital. He is certified by the Radiation Oncology - American Board of Radiology and has a state license in Maryland.

Medical School: University of Virginia School of Medicine

Residency: Georgetown University Hospital

Board Certification: Radiation Oncology - American Board of Radiology

Licensed In: Maryland

Affiliations & Hospitals

Dr. Gregory J. Gagnon, MD is associated with these hospitals and organizations:

Meritus Health

Frederick Health

FREDERICK HEALTH HOSPITAL INC

GAGNON ONCOLOGY LLC

Ratings & Reviews

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General Payments

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

**Payments by Company**
Varian Medical Systems, Inc.	$652 TrueBeam $614	$37
E.R. Squibb & Sons, L.L.C.	$471 OPDIVO $182	ERBITUX $109	EMPLICITI $46	SPRYCEL $40	$93
INSYS Therapeutics Inc	$232 SUBSYS $232
Novartis Pharmaceuticals Corporation	$202 AFINITOR $72	VOTRIENT $58	KISQALI $46	ZYKADIA $13	PROMACTA $13
Astellas Pharma US Inc	$115 PADCEV $115
Other	$1,202 Gelclair $88	Gilotrif $63	TAGRISSO $58	IMBRUVICA $57	Cabometyx $56	Other $881

**Types of Payments**
Food and Beverage	$2,396
Travel and Lodging	$467
Education	$10

Ownership and Interest Payments

This table describes ownership payments received by Dr. Gregory J. Gagnon, MD.

DARA Biosciences, Inc.	2013	$0.00	Physician Covered Recipient	None
DARA Biosciences, Inc.	2013	$0.00	Physician Covered Recipient	None
DARA Biosciences, Inc.	2013	$0.00	Physician Covered Recipient	None
DARA Biosciences, Inc.	2014	$0.00	Physician Covered Recipient	None
DARA Biosciences, Inc.	2013	$0.00	Physician Covered Recipient	None
DARA Biosciences, Inc.	2013	$0.00	Physician Covered Recipient	None
DARA Biosciences, Inc.	2013	$0.00	Physician Covered Recipient	None

Biography

Dr. Gregory Gagnon's specialty is radiation oncology. He has a special interest in cancer and radiation therapy. Before performing his residency at Georgetown University Hospital, Dr. Gagnon attended the University of Virginia School of Medicine. Dr. Gagnon's hospital/clinic affiliations include Frederick Health and Meritus Health. Frederick Health reports that he is accepting new patients at his office in Frederick, MD.

Select Year:

Dr. Gregory J. Gagnon, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Gregory J. Gagnon, MD in 2023

By Volume:

By Affordability:

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. Gregory J. Gagnon, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Gregory J. Gagnon, 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. Gregory J. Gagnon, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Ownership and Interest Payments

Biography

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