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Dr. John Dawson Mason, MD

(No ratings)

Specializes in: Emergency Medicine

1500 S Mill Avenue
Tempe, AZ 85281

(480) 784-5533

Dr. John Dawson Mason, MD is an emergency medicine doctor in Tempe, AZ specializing in emergency medicine. Dr. John Dawson Mason, MD is affiliated with U.S. Department of Veterans Affairs and STEWARD EMERGENCY PHYSICIANS OF ARIZONA INC.

Office Locations

1500 S Mill Avenue
Tempe, AZ 85281

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650 East Indian School Road Phoenix Va Health Care System (644)
Phoenix, AZ 85012

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2012 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	211

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2013 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	241

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	123
Female	121

**Ethnicity**
Non-Hispanic White	184
Black	13
Hispanic	32
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	72
From 75 to 84	49
85 and over	42
Less than 65	81

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2013

Hypertension	72
High Cholesterol	60
Stroke	13
Ischemic Heart Disease	42
Depression	30
Chronic Kidney Disease	36
Asthma	15
Osteoperosis	7
Atrial Fibrilation	15
Heart Failure	28
Chronic Obstructive Pulmonary Disease	22
Diabetes	36
Dementia	14
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2014 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	292

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	138
Female	178

**Ethnicity**
Non-Hispanic White	195
Black	41
Hispanic	61
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	85
From 75 to 84	68
85 and over	55
Less than 65	108

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2014

Hypertension	75
High Cholesterol	66
Stroke	15
Ischemic Heart Disease	53
Depression	37
Chronic Kidney Disease	45
Asthma	18
Osteoperosis	6
Atrial Fibrilation	16
Heart Failure	36
Chronic Obstructive Pulmonary Disease	29
Diabetes	47
Dementia	23
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2015 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	301

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	324
Female	326

**Ethnicity**
Non-Hispanic White	376
Black	84
Hispanic	158
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	156
85 and over	100
Less than 65	190

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2015

Hypertension	75
High Cholesterol	59
Stroke	17
Ischemic Heart Disease	54
Depression	33
Chronic Kidney Disease	46
Asthma	25
Osteoperosis	8
Atrial Fibrilation	19
Heart Failure	38
Chronic Obstructive Pulmonary Disease	29
Diabetes	48
Dementia	26
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2016 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	281

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	119
Female	180

**Ethnicity**
Non-Hispanic White	114
Black	19
Hispanic	155
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	84
From 75 to 84	79
85 and over	51
Less than 65	85

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2016

Hypertension	75
High Cholesterol	67
Stroke	16
Ischemic Heart Disease	53
Depression	37
Chronic Kidney Disease	55
Asthma	30
Osteoperosis	14
Atrial Fibrilation	11
Heart Failure	34
Chronic Obstructive Pulmonary Disease	23
Diabetes	56
Dementia	34
Cancer	9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2017 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	193

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	89
Female	129

**Ethnicity**
Non-Hispanic White	93
Black	0
Hispanic	96
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	71
From 75 to 84	35
85 and over	37
Less than 65	75

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2017

Hypertension	75
High Cholesterol	63
Stroke	12
Ischemic Heart Disease	50
Depression	46
Chronic Kidney Disease	61
Asthma	17
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	39
Chronic Obstructive Pulmonary Disease	30
Diabetes	55
Dementia	29
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2018 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	62

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	40
Female	32

**Ethnicity**
Non-Hispanic White	50
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	24
From 75 to 84	0
85 and over	0
Less than 65	27

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2018

Hypertension	75
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	44
Depression	43
Chronic Kidney Disease	49
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	25
Chronic Obstructive Pulmonary Disease	32
Diabetes	38
Dementia	17
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2019 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	133

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	73
Female	78

**Ethnicity**
Non-Hispanic White	93
Black	0
Hispanic	12
Asian	0
Other	0
Native American	31

**Age**
From 65 to 74	59
From 75 to 84	38
85 and over	14
Less than 65	40

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2019

Hypertension	75
High Cholesterol	63
Stroke	9
Ischemic Heart Disease	38
Depression	34
Chronic Kidney Disease	46
Asthma	13
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	25
Chronic Obstructive Pulmonary Disease	20
Diabetes	38
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2020 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	201

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	96
Female	110

**Ethnicity**
Non-Hispanic White	158
Black	0
Hispanic	0
Asian	0
Other	0
Native American	25

**Age**
From 65 to 74	100
From 75 to 84	56
85 and over	27
Less than 65	23

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2020

Hypertension	67
High Cholesterol	61
Stroke	10
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	46
Asthma	9
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	15
Diabetes	34
Dementia	18
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2021 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	205

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	88
Female	120

**Ethnicity**
Non-Hispanic White	191
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	93
From 75 to 84	72
85 and over	28
Less than 65	15

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2021

Hypertension	74
High Cholesterol	71
Stroke	6
Ischemic Heart Disease	41
Depression	32
Chronic Kidney Disease	49
Asthma	11
Osteoperosis	13
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	16
Diabetes	37
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ during 2022 were emergency care.

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

emergency care	119

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	51
Female	74

**Ethnicity**
Non-Hispanic White	103
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	49
From 75 to 84	44
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Dawson Mason, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	34
Depression	29
Chronic Kidney Disease	36
Asthma	14
Osteoperosis	20
Atrial Fibrilation	28
Heart Failure	19
Chronic Obstructive Pulmonary Disease	22
Diabetes	26
Dementia	14
Cancer	21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John Dawson Mason, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Dawson Mason, MD treated as an emergency medicine doctor in Tempe, AZ were emergency care.

emergency care	203

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Dawson Mason, MD.

**Gender**
Male	103
Female	122

**Ethnicity**
Black / African American	14
Asian / Pacific Islander	0
Non-Hispanic White	141
Native American / Alaskan Native	5
Hispanic	47
Other	0

**Age**
75 to 84	54
85 and over	32
Less than 65	58
65 to 74	76

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

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

Hypertension	67
High Cholesterol	57
Stroke	10
Ischemic Heart Disease	40
Depression	31
Chronic Kidney Disease	42
Asthma	13
Osteoporosis	9
Heart Failure	25
Chronic Obstructive Pulmonary Disease	21
Diabetes	37
Atrial Fibrillation	12
Dementia	18
Cancer	9

Education & Training

He has a state license in Arizona.

Licensed In: Arizona

Affiliations & Hospitals

Dr. John Dawson Mason, MD is associated with these hospitals and organizations:

U.S. Department of Veterans Affairs

STEWARD EMERGENCY PHYSICIANS OF ARIZONA INC

Ratings & Reviews

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General Payments

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