In 2023, among providers in related specialties within Maryland, Dr. Thomas Gregory Johnson, MD performed more cardiac procedures procedures for Medicare patients than 95% of them and he also had a list price for cardiac imaging, color Doppler echocardiography, Doppler echocardiography, echocardiogram (echo), spectral Doppler echocardiography, and transthoracic echocardiography (TTE) 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:

Doppler echocardiography

echocardiogram

In 2023, Dr. Thomas Gregory Johnson, MD performed more Doppler echocardiography, and echocardiogram (echo) procedures for Medicare patients than 90% of providers in related specialties within Maryland.

Top 25%

By Volume:

ultrasound

In 2012, Dr. Thomas Gregory Johnson, MD performed more ultrasound (sonogram) procedures for Medicare patients than 75% of providers in related specialties within Maryland.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2012 were hospital care, inpatient care, nursing home care and cardiac procedures.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

cardiac procedures	312
doctor visit	1686
ear procedures	21
hospital care	892
inpatient care	892
lab tests	241
nursing home care	658
preventive care	181
stress testing	95
ultrasound (sonogram)	217
vaccines	181

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2013 were hospital care, inpatient care, nursing home care and cardiac procedures.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

cardiac procedures	361
doctor visit	1577
ear procedures	22
hospital care	806
inpatient care	806
lab tests	270
nursing home care	597
preventive care	254
stress testing	124
ultrasound (sonogram)	237
vaccines	254

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	868
Female	979

**Ethnicity**
Non-Hispanic White	1825
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	746
From 75 to 84	561
85 and over	293
Less than 65	247

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2013

Hypertension	70
High Cholesterol	51
Stroke	6
Ischemic Heart Disease	44
Depression	17
Chronic Kidney Disease	19
Asthma	5
Osteoperosis	7
Atrial Fibrilation	12
Heart Failure	24
Chronic Obstructive Pulmonary Disease	20
Diabetes	33
Dementia	13
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2014 were nursing home care, hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	20
cardiac procedures	367
doctor visit	1338
ear procedures	14
hospital care	766
inpatient care	766
lab tests	448
nursing home care	813
preventive care	322
stress testing	142
ultrasound (sonogram)	225
vaccines	309

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	839
Female	912

**Ethnicity**
Non-Hispanic White	1722
Black	0
Hispanic	0
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	686
From 75 to 84	541
85 and over	260
Less than 65	264

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2014

Hypertension	74
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	44
Depression	21
Chronic Kidney Disease	20
Asthma	8
Osteoperosis	7
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	22
Diabetes	36
Dementia	13
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2015 were nursing home care, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	13
cardiac procedures	418
doctor visit	1469
hospital care	658
inpatient care	643
lab tests	435
nursing home care	864
outpatient care	15
preventive care	450
stress testing	128
ultrasound (sonogram)	290
vaccines	450

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	1954
Female	2006

**Ethnicity**
Non-Hispanic White	3882
Black	0
Hispanic	0
Asian	0
Other	40
Native American	0

**Age**
From 65 to 74	1600
From 75 to 84	1272
85 and over	548
Less than 65	540

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2015

Hypertension	75
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	44
Depression	22
Chronic Kidney Disease	24
Asthma	15
Osteoperosis	8
Atrial Fibrilation	14
Heart Failure	24
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2016 were nursing home care, cardiac procedures, lab tests and hospital care.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	15
cardiac procedures	460
doctor visit	1349
hospital care	413
inpatient care	387
lab tests	448
nursing home care	536
outpatient care	26
preventive care	295
stress testing	154
ultrasound (sonogram)	306
vaccines	277

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	948
Female	1015

**Ethnicity**
Non-Hispanic White	1927
Black	0
Hispanic	0
Asian	0
Other	25
Native American	0

**Age**
From 65 to 74	795
From 75 to 84	616
85 and over	286
Less than 65	266

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2016

Hypertension	75
High Cholesterol	57
Stroke	6
Ischemic Heart Disease	44
Depression	23
Chronic Kidney Disease	29
Asthma	23
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	23
Diabetes	37
Dementia	15
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2017 were lab tests, cardiac procedures, nursing home care and preventive care.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

cardiac procedures	404
doctor visit	1263
hospital care	74
inpatient care	74
lab tests	408
nursing home care	291
preventive care	288
stress testing	131
ultrasound (sonogram)	273
vaccines	277

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	926
Female	1020

**Ethnicity**
Non-Hispanic White	1912
Black	0
Hispanic	0
Asian	0
Other	21
Native American	0

**Age**
From 65 to 74	846
From 75 to 84	566
85 and over	300
Less than 65	234

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2017

Hypertension	75
High Cholesterol	54
Stroke	6
Ischemic Heart Disease	47
Depression	24
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	27
Chronic Obstructive Pulmonary Disease	24
Diabetes	35
Dementia	15
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2018 were lab tests, cardiac procedures, ultrasound (sonogram) and preventive care.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

cardiac procedures	380
doctor visit	1123
lab tests	383
nursing home care	146
preventive care	199
stress testing	118
ultrasound (sonogram)	262
vaccines	187

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	894
Female	915

**Ethnicity**
Non-Hispanic White	1769
Black	0
Hispanic	0
Asian	0
Other	26
Native American	0

**Age**
From 65 to 74	725
From 75 to 84	597
85 and over	266
Less than 65	221

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2018

Hypertension	75
High Cholesterol	63
Stroke	6
Ischemic Heart Disease	49
Depression	26
Chronic Kidney Disease	35
Asthma	6
Osteoperosis	9
Atrial Fibrilation	17
Heart Failure	28
Chronic Obstructive Pulmonary Disease	26
Diabetes	37
Dementia	17
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2019 were cardiac procedures, lab tests, ultrasound (sonogram) and preventive care.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	13
cardiac procedures	392
doctor visit	969
lab tests	315
preventive care	181
stress testing	106
ultrasound (sonogram)	286
vaccines	148

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	954
Female	904

**Ethnicity**
Non-Hispanic White	1820
Black	0
Hispanic	0
Asian	0
Other	25
Native American	0

**Age**
From 65 to 74	756
From 75 to 84	598
85 and over	265
Less than 65	239

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2019

Hypertension	75
High Cholesterol	63
Stroke	5
Ischemic Heart Disease	47
Depression	27
Chronic Kidney Disease	37
Asthma	6
Osteoperosis	7
Atrial Fibrilation	15
Heart Failure	27
Chronic Obstructive Pulmonary Disease	26
Diabetes	35
Dementia	15
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2020 were cardiac procedures, preventive care, vaccines and ultrasound (sonogram).

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	146
cardiac procedures	254
doctor visit	895
lab tests	150
preventive care	208
stress testing	72
thoracic (chest) imaging	12
ultrasound (sonogram)	182
vaccines	208
X-rays	12

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	822
Female	828

**Ethnicity**
Non-Hispanic White	1612
Black	0
Hispanic	0
Asian	0
Other	27
Native American	0

**Age**
From 65 to 74	717
From 75 to 84	522
85 and over	232
Less than 65	179

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2020

Hypertension	75
High Cholesterol	61
Stroke	5
Ischemic Heart Disease	47
Depression	28
Chronic Kidney Disease	34
Asthma	6
Osteoperosis	6
Atrial Fibrilation	16
Heart Failure	27
Chronic Obstructive Pulmonary Disease	22
Diabetes	36
Dementia	14
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2021 were cardiac procedures, ultrasound (sonogram), blood draw and lab tests.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	227
cardiac procedures	366
doctor visit	1058
lab tests	104
preventive care	43
stress testing	82
ultrasound (sonogram)	284
vaccines	29

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	905
Female	916

**Ethnicity**
Non-Hispanic White	1781
Black	0
Hispanic	0
Asian	0
Other	29
Native American	0

**Age**
From 65 to 74	737
From 75 to 84	644
85 and over	241
Less than 65	199

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2021

Hypertension	75
High Cholesterol	65
Stroke	6
Ischemic Heart Disease	45
Depression	27
Chronic Kidney Disease	36
Asthma	7
Osteoperosis	7
Atrial Fibrilation	17
Heart Failure	28
Chronic Obstructive Pulmonary Disease	22
Diabetes	36
Dementia	13
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2022 were cardiac procedures, blood draw, ultrasound (sonogram) and stress testing.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	316
cardiac procedures	317
doctor visit	816
lab tests	61
preventive care	56
stress testing	77
ultrasound (sonogram)	240
vaccines	38

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	743
Female	808

**Ethnicity**
Non-Hispanic White	1516
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	626
From 75 to 84	565
85 and over	221
Less than 65	139

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	36
Depression	25
Chronic Kidney Disease	26
Asthma	9
Osteoperosis	11
Atrial Fibrilation	26
Heart Failure	24
Chronic Obstructive Pulmonary Disease	26
Diabetes	37
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD during 2023 were cardiac procedures, ultrasound (sonogram), stress testing and blood draw.

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

blood draw	22
cardiac procedures	259
doctor visit	70
nuclear scan	14
stress testing	56
ultrasound (sonogram)	203

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Male	512
Female	547

**Ethnicity**
Non-Hispanic White	1029
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	415
From 75 to 84	385
85 and over	160
Less than 65	99

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	41
Depression	29
Chronic Kidney Disease	29
Asthma	10
Osteoperosis	12
Atrial Fibrilation	29
Heart Failure	27
Chronic Obstructive Pulmonary Disease	29
Diabetes	38
Dementia	12
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Thomas Gregory Johnson, MD for Medicare patients.

The highest averages for the top procedures that Dr. Thomas Gregory Johnson, MD treated as a family medicine practitioner in Oakland, MD were hospital care, inpatient care, nursing home care and cardiac procedures.

blood draw	96
cardiac procedures	357
doctor visit	1134
ear procedures	19
hospital care	601
inpatient care	594
lab tests	296
nuclear scan	14
nursing home care	557
outpatient care	20
preventive care	225
stress testing	107
thoracic (chest) imaging	12
ultrasound (sonogram)	250
vaccines	214
X-rays	12

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Thomas Gregory Johnson, MD.

**Gender**
Female	904
Male	863

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	1732
Native American / Alaskan Native	0
Hispanic	0
Other	17

**Age**
85 and over	256
75 to 84	572
Less than 65	218
65 to 74	720

Average of Total of Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD From 2012 - 2023

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

Hypertension	68
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	40
Depression	22
Chronic Kidney Disease	26
Asthma	8
Osteoporosis	7
Heart Failure	23
Chronic Obstructive Pulmonary Disease	21
Diabetes	32
Atrial Fibrillation	15
Dementia	12
Cancer	11

Education & Training

He has a state license in Maryland.

Licensed In: Maryland

Ratings & Reviews

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General Payments

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

**Payments by Company**
Medtronic Vascular, Inc.	$1,593 Cardiac Diagnostics and Monitoring $1,561	Patient Management - Data Connectivity Solutions $17	Cardiac Resynchronization Therapy - CRT $15
Novo Nordisk Inc	$863 Victoza $412	Tresiba $217	NovoLog $129	Levemir $59	$45
Janssen Pharmaceuticals, Inc	$479 XARELTO $164	INVOKANA $147	INVOKAMET $106	INVEGA $33	$30
AstraZeneca Pharmaceuticals LP	$399 SYMBICORT $103	MOVANTIK $94	FARXIGA $73	BYDUREON PEN $70	BRILINTA $58
Merck Sharp & Dohme Corporation	$361 JANUMET XR $162	JANUVIA $56	DULERA $56	NON-PRODUCT $42	BELSOMRA $16	Other $29
Other	$2,188 ELIQUIS $364	TOUJEO $128	LINZESS $105	TEFLARO $92	BASAGLAR $91	Other $1,408

**Types of Payments**
Food and Beverage	$4,404
Travel and Lodging	$1,283
Education	$196

Biography

Dr. Thomas Johnson sees patients in Oakland, MD. His medical specialty is family medicine. He attended medical school at the University of Pittsburgh School of Medicine.

Select Year:

Dr. Thomas Gregory Johnson, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Thomas Gregory Johnson, MD in 2023

By Volume:

By Affordability:

By Volume:

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. Thomas Gregory Johnson, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Average Medicare Patient Data From 2012 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Thomas Gregory Johnson, MD From 2012 - 2023

Education & Training

Ratings & Reviews

General Payments

Biography

Other Providers in Oakland, MD