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Dr. John Mathis Barnett, MD

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Specializes in: Radiation Oncology

700 Olympic Plaza Circle Suite 700
Tyler, TX 75701

(903) 262-3900

Dr. John Mathis Barnett, MD is a radiation oncologist in Tyler, TX specializing in radiation oncology.

Office Locations

700 Olympic Plaza Circle Suite 700
Tyler, TX 75701

(903) 262-3900

(903) 262-3993

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2012 were radiation therapy, blood draw, CT scan and abdominal imaging.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

abdominal imaging	386
blood draw	961
CT scan	397
doctor visit	1159
lab tests	310
pelvic imaging	373
radiation therapy	2680
thoracic (chest) imaging	11

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2013 were radiation therapy, blood draw and lab tests.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

blood draw	893
doctor visit	1298
lab tests	115
radiation therapy	3424

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Ethnicity**
Non-Hispanic White	389
Black	45
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	215
From 75 to 84	188
85 and over	29
Less than 65	16

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2013

Hypertension	69
High Cholesterol	61
Stroke	4
Ischemic Heart Disease	42
Depression	10
Chronic Kidney Disease	15
Asthma	2
Osteoperosis	2
Atrial Fibrilation	9
Heart Failure	13
Chronic Obstructive Pulmonary Disease	17
Diabetes	32
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2014 were radiation therapy, blood draw and lab tests.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

blood draw	910
doctor visit	1291
lab tests	84
radiation therapy	2952

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Ethnicity**
Non-Hispanic White	386
Black	41
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	206
From 75 to 84	203
85 and over	27
Less than 65	11

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2014

Hypertension	73
High Cholesterol	63
Stroke	4
Ischemic Heart Disease	41
Depression	9
Chronic Kidney Disease	16
Asthma	4
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	14
Chronic Obstructive Pulmonary Disease	16
Diabetes	32
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2015 were blood draw and lab tests.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

blood draw	1009
doctor visit	1441
lab tests	114

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Ethnicity**
Non-Hispanic White	824
Black	82
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	416
From 75 to 84	440
85 and over	66
Less than 65	30

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2015

Hypertension	70
High Cholesterol	63
Stroke	5
Ischemic Heart Disease	41
Depression	8
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	14
Chronic Obstructive Pulmonary Disease	14
Diabetes	30
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2016 were blood draw and lab tests.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

blood draw	832
doctor visit	1192
lab tests	145

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Ethnicity**
Non-Hispanic White	408
Black	36
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	198
From 75 to 84	218
85 and over	32
Less than 65	15

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2016

Hypertension	71
High Cholesterol	63
Stroke	5
Ischemic Heart Disease	43
Depression	11
Chronic Kidney Disease	20
Asthma	15
Osteoperosis	0
Atrial Fibrilation	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	14
Diabetes	31
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2017 were blood draw and lab tests.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

blood draw	703
doctor visit	1125
lab tests	91

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Ethnicity**
Non-Hispanic White	400
Black	47
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	187
From 75 to 84	228
85 and over	28
Less than 65	24

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2017

Hypertension	73
High Cholesterol	52
Stroke	4
Ischemic Heart Disease	42
Depression	9
Chronic Kidney Disease	25
Asthma	3
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	13
Chronic Obstructive Pulmonary Disease	15
Diabetes	31
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2018 were blood draw and lab tests.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

blood draw	684
doctor visit	1120
lab tests	97

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Ethnicity**
Non-Hispanic White	379
Black	49
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	196
From 75 to 84	213
85 and over	26
Less than 65	19

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2018

Hypertension	75
High Cholesterol	63
Stroke	5
Ischemic Heart Disease	43
Depression	10
Chronic Kidney Disease	26
Asthma	0
Osteoperosis	3
Atrial Fibrilation	12
Heart Failure	15
Chronic Obstructive Pulmonary Disease	17
Diabetes	32
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2019 were blood draw, lab tests, CT scan and pelvic imaging.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

abdominal imaging	28
blood draw	692
CT scan	28
doctor visit	1120
lab tests	100
pelvic imaging	28

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Gender**
Male	451
Female	11

**Ethnicity**
Non-Hispanic White	395
Black	40
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	199
From 75 to 84	210
85 and over	41
Less than 65	12

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2019

Hypertension	74
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	45
Depression	12
Chronic Kidney Disease	30
Asthma	3
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	31
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX during 2020 were blood draw, CT scan, abdominal imaging and pelvic imaging.

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

abdominal imaging	236
blood draw	247
CT scan	236
doctor visit	172
lab tests	111
pelvic imaging	225

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Gender**
Male	294
Female	72

**Ethnicity**
Non-Hispanic White	320
Black	24
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	155
From 75 to 84	153
85 and over	40
Less than 65	18

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2020

Hypertension	75
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	49
Depression	16
Chronic Kidney Disease	44
Asthma	5
Osteoperosis	6
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	34
Dementia	11
Cancer	48

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2020

Volume of procedures performed by Dr. John Mathis Barnett, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Mathis Barnett, MD treated as a radiation oncologist in Tyler, TX were radiation therapy, blood draw, CT scan and abdominal imaging.

abdominal imaging	216
blood draw	770
CT scan	220
doctor visit	1102
lab tests	129
pelvic imaging	208
radiation therapy	3018
thoracic (chest) imaging	11

Average Medicare Patient Data From 2012 - 2020

Information about Medicare patients treated by Dr. John Mathis Barnett, MD.

**Gender**
Female	9
Male	82

**Ethnicity**
Black / African American	40
Asian / Pacific Islander	0
Non-Hispanic White	389
Native American / Alaskan Native	0
Hispanic	3
Other	0

**Age**
75 to 84	205
85 and over	32
Less than 65	16
65 to 74	196

Average of Total of Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD From 2012 - 2020

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

Hypertension	64
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	38
Depression	9
Chronic Kidney Disease	21
Asthma	4
Osteoporosis	1
Heart Failure	12
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Atrial Fibrillation	9
Dementia	6
Cancer	63

Education & Training

He has a state license in Texas.

Licensed In: Texas

Ratings & Reviews

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General Payments

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

**Payments by Company**
Pharmacyclics LLC, An AbbVie Company	$92 IMBRUVICA $70	EPKINLY $22
NeoTract Inc.	$87 Urolift - UL400 $87
AbbVie Inc.	$63 IMBRUVICA $39	Epkinly $23
Astellas Pharma US Inc	$31 XTANDI $31
Janssen Biotech, Inc.	$30 Erleada $17	ZYTIGA $13
Other	$194 Xofigo $29	Lumiere $27	Lupron $23	Urology & Gynecology Products $17	BOTOX $16	Other $81

**Types of Payments**
Food and Beverage	$496

Biography

Dr. John Barnett works as a radiation oncology specialist in Tyler, TX. Dr. Barnett obtained a license to practice in Texas.

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Dr. John Mathis Barnett, MD

Office Locations

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 Mathis Barnett, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD in 2020

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2020

Average Medicare Patient Data From 2012 - 2020

Average of Total of Conditions of Medicare patients treated by Dr. John Mathis Barnett, MD From 2012 - 2020

Education & Training

Ratings & Reviews

General Payments

Biography

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