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Home > TN Providers > Diagnostic Radiologists

Dr. John T. Johnston, MD

(No ratings)

Specializes in: Diagnostic Radiology

Loyola University Chicago, Stritch School of Medicine (1980)

1710 Gunbarrel Road
Chattanooga, TN 37421

(423) 553-1220

Dr. John T. Johnston, MD is a diagnostic radiologist in Chattanooga, TN specializing in diagnostic radiology. He graduated from Loyola University Chicago, Stritch School of Medicine in 1980 and has 46 years of experience. Dr. John T. Johnston, MD is affiliated with Radiology Alliance, PLAZA RADIOLOGY, LLC and MURFREESBORO RADIOLOGY AND NUCLEAR MEDICINE CONSULTANTS PLLC.

Office Locations

1710 Gunbarrel Road
Chattanooga, TN 37421

(423) 553-1220

(423) 553-1231

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210 25th Avenue N Suite 1204
Nashville, TN 37203

(615) 312-0600

(615) 320-3259

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Noteworthy Medicare Patient Procedures Performed by Dr. John T. Johnston, MD in 2023

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

Top 10%

By Affordability:

blood tests

creatinine blood test

creatinine test

kidney function tests

lab tests

In 2023, Dr. John T. Johnston, MD had a list price for blood tests, creatinine blood test, creatinine test, kidney function tests, and lab tests that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Tennessee. 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 Volume:

MRI

In 2012, Dr. John T. Johnston, MD performed more MRI (magnetic resonance imaging) procedures for Medicare patients than 75% of providers in related specialties within Tennessee.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2012 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	381
blood draw	99
brain imaging (neuroimaging)	285
breast procedures	300
cardiac procedures	28
catheterization	14
CT scan	529
diagnostic imaging	34
hip imaging	38
lab tests	93
MRI (magnetic resonance imaging)	207
musculoskeletal imaging	81
neck imaging	29
nuclear scan	28
pelvic imaging	263
preventive care	232
spinal procedures	123
stress testing	28
thoracic (chest) imaging	1261
ultrasound (sonogram)	223
vascular procedures	126
women's imaging	300
X-rays	1599

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2013 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	411
blood draw	77
brain imaging (neuroimaging)	197
breast procedures	240
cardiac procedures	28
CT scan	501
diagnostic imaging	27
hip imaging	27
lab tests	76
MRI (magnetic resonance imaging)	187
musculoskeletal imaging	68
neck imaging	11
nuclear scan	28
pelvic imaging	288
preventive care	193
spinal procedures	179
stress testing	28
thoracic (chest) imaging	1237
ultrasound (sonogram)	309
vascular procedures	176
women's imaging	240
X-rays	1537

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	851
Female	1460

**Ethnicity**
Non-Hispanic White	1979
Black	296
Hispanic	0
Asian	0
Other	16
Native American	0

**Age**
From 65 to 74	895
From 75 to 84	622
85 and over	233
Less than 65	561

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2013

Hypertension	75
High Cholesterol	57
Stroke	8
Ischemic Heart Disease	49
Depression	31
Chronic Kidney Disease	31
Asthma	12
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	33
Chronic Obstructive Pulmonary Disease	35
Diabetes	41
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2014 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	547
blood draw	18
brain imaging (neuroimaging)	281
breast procedures	239
cardiac procedures	25
CT scan	649
diagnostic imaging	36
hip imaging	53
lab tests	98
MRI (magnetic resonance imaging)	236
musculoskeletal imaging	124
neck imaging	12
nuclear scan	25
pelvic imaging	360
preventive care	176
spinal procedures	202
stress testing	25
thoracic (chest) imaging	1211
ultrasound (sonogram)	364
vascular procedures	173
women's imaging	239
X-rays	1546

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	890
Female	1623

**Ethnicity**
Non-Hispanic White	2169
Black	291
Hispanic	24
Asian	0
Other	18
Native American	0

**Age**
From 65 to 74	900
From 75 to 84	697
85 and over	275
Less than 65	641

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2014

Hypertension	75
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	45
Depression	34
Chronic Kidney Disease	33
Asthma	13
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	32
Chronic Obstructive Pulmonary Disease	34
Diabetes	41
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2015 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	534
aspiration	16
brain imaging (neuroimaging)	306
breast procedures	181
cardiac procedures	28
catheterization	23
CT scan	717
diagnostic imaging	11
gastrointestinal procedures	16
hip imaging	48
lab tests	84
MRI (magnetic resonance imaging)	158
musculoskeletal imaging	106
neck imaging	14
nuclear scan	28
pelvic imaging	338
pleural drainage	16
preventive care	138
spinal procedures	197
stress testing	28
thoracic (chest) imaging	1574
ultrasound (sonogram)	407
vascular procedures	203
women's imaging	181
X-rays	1849

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	2128
Female	3442

**Ethnicity**
Non-Hispanic White	4844
Black	616
Hispanic	46
Asian	0
Other	34
Native American	0

**Age**
From 65 to 74	2140
From 75 to 84	1398
85 and over	618
Less than 65	1414

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2015

Hypertension	75
High Cholesterol	58
Stroke	9
Ischemic Heart Disease	44
Depression	36
Chronic Kidney Disease	36
Asthma	24
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	32
Chronic Obstructive Pulmonary Disease	34
Diabetes	41
Dementia	16
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2016 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	498
aspiration	35
brain imaging (neuroimaging)	321
breast procedures	157
cardiac procedures	37
catheterization	15
CT scan	739
lab tests	82
MRI (magnetic resonance imaging)	267
musculoskeletal imaging	57
nuclear scan	37
pelvic imaging	317
pleural drainage	19
preventive care	157
spinal procedures	295
stress testing	37
thoracic (chest) imaging	1336
ultrasound (sonogram)	297
vascular procedures	158
women's imaging	157
X-rays	1531

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	1085
Female	1657

**Ethnicity**
Non-Hispanic White	2371
Black	318
Hispanic	17
Asian	13
Other	23
Native American	0

**Age**
From 65 to 74	1106
From 75 to 84	705
85 and over	320
Less than 65	611

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2016

Hypertension	75
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	47
Depression	34
Chronic Kidney Disease	43
Asthma	37
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	33
Chronic Obstructive Pulmonary Disease	34
Diabetes	41
Dementia	17
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2017 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	574
brain imaging (neuroimaging)	370
breast procedures	249
cardiac procedures	41
CT scan	820
diagnostic imaging	34
lab tests	159
MRI (magnetic resonance imaging)	308
musculoskeletal imaging	62
neck imaging	25
nuclear scan	41
pelvic imaging	343
preventive care	185
spinal procedures	285
stress testing	41
thoracic (chest) imaging	1279
ultrasound (sonogram)	463
vascular procedures	227
women's imaging	249
X-rays	1466

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	1100
Female	1897

**Ethnicity**
Non-Hispanic White	2592
Black	348
Hispanic	19
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	1227
From 75 to 84	796
85 and over	325
Less than 65	649

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2017

Hypertension	75
High Cholesterol	54
Stroke	8
Ischemic Heart Disease	42
Depression	34
Chronic Kidney Disease	44
Asthma	11
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	29
Chronic Obstructive Pulmonary Disease	33
Diabetes	39
Dementia	17
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2018 were CT scan, abdominal imaging, ultrasound (sonogram) and X-rays.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	553
brain imaging (neuroimaging)	219
breast procedures	340
cardiac procedures	24
CT scan	621
diagnostic imaging	42
gastrointestinal procedures	13
hip imaging	11
lab tests	158
MRI (magnetic resonance imaging)	280
musculoskeletal imaging	106
neck imaging	28
nuclear scan	24
pelvic imaging	278
preventive care	240
spinal procedures	217
stress testing	24
thoracic (chest) imaging	143
ultrasound (sonogram)	442
vascular procedures	92
women's imaging	340
X-rays	405

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	925
Female	1630

**Ethnicity**
Non-Hispanic White	2279
Black	214
Hispanic	18
Asian	0
Other	27
Native American	0

**Age**
From 65 to 74	1112
From 75 to 84	711
85 and over	250
Less than 65	482

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2018

Hypertension	75
High Cholesterol	58
Stroke	6
Ischemic Heart Disease	42
Depression	32
Chronic Kidney Disease	40
Asthma	11
Osteoperosis	8
Atrial Fibrilation	14
Heart Failure	26
Chronic Obstructive Pulmonary Disease	28
Diabetes	36
Dementia	13
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2019 were CT scan, abdominal imaging, ultrasound (sonogram) and X-rays.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	589
brain imaging (neuroimaging)	211
breast procedures	460
cardiac procedures	11
CT scan	616
diagnostic imaging	46
hip imaging	14
lab tests	164
MRI (magnetic resonance imaging)	294
musculoskeletal imaging	126
neck imaging	26
nuclear scan	11
pelvic imaging	265
preventive care	325
spinal procedures	264
stress testing	11
thoracic (chest) imaging	165
ultrasound (sonogram)	552
vascular procedures	96
women's imaging	460
X-rays	500

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	900
Female	1725

**Ethnicity**
Non-Hispanic White	2364
Black	186
Hispanic	32
Asian	0
Other	27
Native American	0

**Age**
From 65 to 74	1184
From 75 to 84	734
85 and over	226
Less than 65	481

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2019

Hypertension	75
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	39
Depression	32
Chronic Kidney Disease	40
Asthma	10
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	24
Diabetes	38
Dementia	13
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2020 were X-rays, women's imaging, breast procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	205
brain imaging (neuroimaging)	75
breast procedures	222
CT scan	178
diagnostic imaging	30
lab tests	76
MRI (magnetic resonance imaging)	98
musculoskeletal imaging	43
neck imaging	18
pelvic imaging	80
preventive care	152
spinal procedures	77
thoracic (chest) imaging	44
ultrasound (sonogram)	220
vascular procedures	37
women's imaging	222
X-rays	237

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	373
Female	771

**Ethnicity**
Non-Hispanic White	1040
Black	60
Hispanic	0
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	536
From 75 to 84	340
85 and over	88
Less than 65	180

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2020

Hypertension	75
High Cholesterol	60
Stroke	6
Ischemic Heart Disease	38
Depression	28
Chronic Kidney Disease	40
Asthma	12
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	22
Chronic Obstructive Pulmonary Disease	22
Diabetes	36
Dementia	12
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2021 were X-rays, women's imaging, breast procedures and abdominal imaging.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	283
brain imaging (neuroimaging)	100
breast procedures	304
CT scan	251
diagnostic imaging	48
lab tests	122
MRI (magnetic resonance imaging)	184
musculoskeletal imaging	68
neck imaging	18
pelvic imaging	135
preventive care	210
spinal procedures	147
thoracic (chest) imaging	61
ultrasound (sonogram)	280
vascular procedures	82
women's imaging	304
X-rays	349

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	501
Female	1121

**Ethnicity**
Non-Hispanic White	1483
Black	89
Hispanic	15
Asian	11
Other	24
Native American	0

**Age**
From 65 to 74	780
From 75 to 84	490
85 and over	129
Less than 65	223

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2021

Hypertension	75
High Cholesterol	62
Stroke	6
Ischemic Heart Disease	38
Depression	28
Chronic Kidney Disease	38
Asthma	10
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	21
Chronic Obstructive Pulmonary Disease	20
Diabetes	36
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN during 2022 were X-rays, women's imaging, breast procedures and CT scan.

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

abdominal imaging	195
brain imaging (neuroimaging)	145
breast procedures	420
CT scan	272
diagnostic imaging	60
lab tests	118
MRI (magnetic resonance imaging)	166
musculoskeletal imaging	118
neck imaging	13
pelvic imaging	125
preventive care	264
spinal procedures	139
thoracic (chest) imaging	65
ultrasound (sonogram)	234
vascular procedures	55
women's imaging	420
X-rays	478

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	562
Female	1224

**Ethnicity**
Non-Hispanic White	1635
Black	91
Hispanic	17
Asian	0
Other	31
Native American	0

**Age**
From 65 to 74	848
From 75 to 84	581
85 and over	186
Less than 65	171

Conditions of Medicare patients treated by Dr. John T. Johnston, MD in 2022

Hypertension	75
High Cholesterol	74
Stroke	11
Ischemic Heart Disease	32
Depression	27
Chronic Kidney Disease	27
Asthma	14
Osteoperosis	17
Atrial Fibrilation	20
Heart Failure	21
Chronic Obstructive Pulmonary Disease	24
Diabetes	35
Dementia	9
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John T. Johnston, MD for Medicare patients.

The highest averages for the top procedures that Dr. John T. Johnston, MD treated as a diagnostic radiologist in Chattanooga, TN were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

abdominal imaging	433
aspiration	25
blood draw	64
brain imaging (neuroimaging)	228
breast procedures	282
cardiac procedures	27
catheterization	17
CT scan	535
diagnostic imaging	36
gastrointestinal procedures	14
hip imaging	31
lab tests	111
MRI (magnetic resonance imaging)	216
musculoskeletal imaging	87
neck imaging	19
nuclear scan	27
pelvic imaging	253
pleural drainage	17
preventive care	206
spinal procedures	193
stress testing	27
thoracic (chest) imaging	761
ultrasound (sonogram)	344
vascular procedures	129
women's imaging	282
X-rays	1045

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John T. Johnston, MD.

**Gender**
Male	846
Female	1504

**Ethnicity**
Black / African American	228
Asian / Pacific Islander	2
Non-Hispanic White	2068
Hispanic	17
Native American / Alaskan Native	0
Other	22

**Age**
75 to 84	643
85 and over	240
Less than 65	492
65 to 74	975

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

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

Hypertension	68
High Cholesterol	54
Stroke	6
Ischemic Heart Disease	37
Depression	28
Chronic Kidney Disease	33
Asthma	14
Osteoporosis	9
Heart Failure	24
Chronic Obstructive Pulmonary Disease	26
Diabetes	34
Atrial Fibrillation	13
Cancer	11
Dementia	12

Education & Training

Dr. John T. Johnston, MD graduated from Loyola University Chicago, Stritch School of Medicine in 1980. He has a state license in Tennessee.

Medical School: Loyola University Chicago, Stritch School of Medicine (1980)

Licensed In: Tennessee

Affiliations & Hospitals

Dr. John T. Johnston, MD is associated with these hospitals and organizations:

Radiology Alliance

PLAZA RADIOLOGY, LLC

MURFREESBORO RADIOLOGY AND NUCLEAR MEDICINE CONSULTANTS PLLC

Ratings & Reviews

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General Payments

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

**Payments by Company**
Boehringer Ingelheim Pharmaceuticals, Inc.	$64 $64
Bard Peripheral Vascular, Inc.	$28 BPV-Ultraverse $28
AstraZeneca Pharmaceuticals LP	$19 IMFINZI $19
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$15 XIFAXAN $15

**Types of Payments**
Food and Beverage	$126

Biography

Dr. John Johnston specializes in diagnostic radiology and practices in Chattanooga, TN and Nashville, TN. Dr. Johnston is affiliated with Radiology Alliance. He attended medical school at Loyola University Chicago, Stritch School of Medicine.