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Home > NC Providers > Allergists & Immunologists

Dr. Douglas Thomas Johnston, DO

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Specializes in: Allergy & Immunology

2600 E 7th Street Unit A
Charlotte, NC 28204

(704) 372-7900

Dr. Douglas Thomas Johnston, DO is an allergist and immunologist in Charlotte, NC specializing in allergy & immunology.

Office Locations

10310 Mallard Creek Road Suite 101a
Charlotte, NC 28262

(704) 341-9600

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200 Patewood Drive Suite A140
Greenville, SC 29615

(864) 454-5125

(864) 241-9201

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2600 E 7th Street Unit A
Charlotte, NC 28204

(704) 372-7900

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8045 Providence Road Suite 300
Charlotte, NC 28277

(704) 341-9996

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2012 were immunotherapy and injections.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

doctor visit	37
immunotherapy	74
injections	74

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2013 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	724
doctor visit	52
minimally invasive procedures	724
skin testing	724

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	11
Female	27

**Ethnicity**
Non-Hispanic White	25
Black	0
Hispanic	0
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	0

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2013

Hypertension	71
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	0
Depression	32
Chronic Kidney Disease	0
Asthma	32
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2014 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	651
doctor visit	71
minimally invasive procedures	651
skin testing	651

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	17
Female	28

**Ethnicity**
Non-Hispanic White	28
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	23
From 75 to 84	0
85 and over	0
Less than 65	11

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2014

Hypertension	53
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	0
Depression	24
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2015 were skin testing, allergy testing and minimally invasive procedures.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	1364
doctor visit	109
minimally invasive procedures	1286
skin testing	1364

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	48
Female	112

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

**Age**
From 65 to 74	86
From 75 to 84	0
85 and over	0
Less than 65	42

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2015

Hypertension	49
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	0
Depression	21
Chronic Kidney Disease	20
Asthma	34
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	29
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2016 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	1523
doctor visit	111
minimally invasive procedures	1523
skin testing	1523

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	27
Female	52

**Ethnicity**
Non-Hispanic White	57
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	37
From 75 to 84	0
85 and over	0
Less than 65	21

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2016

Hypertension	58
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	18
Depression	18
Chronic Kidney Disease	14
Asthma	38
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	18
Diabetes	18
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2017 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	1162
doctor visit	127
minimally invasive procedures	1162
skin testing	1162

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	26
Female	53

**Ethnicity**
Non-Hispanic White	54
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	39
From 75 to 84	0
85 and over	0
Less than 65	19

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2017

Hypertension	57
High Cholesterol	42
Stroke	0
Ischemic Heart Disease	16
Depression	23
Chronic Kidney Disease	16
Asthma	27
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	14
Diabetes	22
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2018 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	595
doctor visit	107
minimally invasive procedures	595
skin testing	595

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	21
Female	47

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

**Age**
From 65 to 74	40
From 75 to 84	12
85 and over	0
Less than 65	16

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2018

Hypertension	66
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	24
Depression	29
Chronic Kidney Disease	18
Asthma	43
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	26
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

doctor visit	96

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	18
Female	44

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

**Age**
From 65 to 74	34
From 75 to 84	17
85 and over	0
Less than 65	11

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2019

Hypertension	53
High Cholesterol	35
Stroke	0
Ischemic Heart Disease	0
Depression	19
Chronic Kidney Disease	0
Asthma	37
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	26
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2020 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	783
doctor visit	155
minimally invasive procedures	783
skin testing	783

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	40
Female	78

**Ethnicity**
Non-Hispanic White	87
Black	20
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	63
From 75 to 84	31
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2020

Hypertension	51
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	15
Depression	25
Chronic Kidney Disease	16
Asthma	32
Osteoperosis	9
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	21
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC during 2021 were skin testing, minimally invasive procedures and allergy testing.

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

allergy testing	1117
doctor visit	109
minimally invasive procedures	1117
skin testing	1117

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	30
Female	57

**Ethnicity**
Non-Hispanic White	69
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	47
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2021

Hypertension	57
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	22
Depression	26
Chronic Kidney Disease	18
Asthma	30
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	23
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

doctor visit	14

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Age**
From 65 to 74	17
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2022

Hypertension	62
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	41
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Douglas Thomas Johnston, DO for Medicare patients.

The highest averages for the top procedures that Dr. Douglas Thomas Johnston, DO treated as an allergist and immunologist in Charlotte, NC were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

allergy testing	989
doctor visit	89
immunotherapy	74
injections	74
minimally invasive procedures	980
skin testing	989

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Douglas Thomas Johnston, DO.

**Gender**
Male	21
Female	45

**Ethnicity**
Black / African American	1
Asian / Pacific Islander	0
Non-Hispanic White	47
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	7
85 and over	0
Less than 65	10
65 to 74	37

Average of Total of Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Douglas Thomas Johnston, DO treated were hypertension, high cholesterol, asthma and depression.

Hypertension	52
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	8
Depression	19
Chronic Kidney Disease	9
Asthma	28
Osteoporosis	2
Heart Failure	0
Chronic Obstructive Pulmonary Disease	2
Diabetes	15
Atrial Fibrillation	0
Dementia	0
Cancer	0

Education & Training

He has a state license in South Carolina.

Licensed In: South Carolina

Ratings & Reviews

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General Payments

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

**Payments by Company**
Shire North American Group Inc	$421,616 Cinryze $288,501	TAKHZYRO $64,303	FIRAZYR $29,133	CUVITRU $63	Kalbitor $55	Other $39,560
CSL Behring	$74,200 Haegarda $69,283	CSL 830 $4,678	Hizentra $89	Berinert $78	Berinert 500U $72
Takeda Pharmaceuticals U.S.A., Inc.	$70,582 Cinryze $41,501	TAKHZYRO $19,497	FIRAZYR $1,125	CUVITRU $47	HYQVIA $18	Other $8,394
Pharming Healthcare, Inc.	$66,720 Ruconest $66,720
BioCryst Pharmaceuticals, Inc.	$36,603 Orladeyo $7,948	$28,655
Other	$97,689 XOLAIR $19,997	Kalbitor $14,672	Orladeyo $12,424	PALFORZIA $11,888	FIRAZYR $7,342	Other $31,367

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$361,323
Consulting Fee	$154,576
Honoraria	$117,954
Travel and Lodging	$93,520
Food and Beverage	$25,941
Other	$14,096

Research Payments

Dr. Douglas Thomas Johnston, DO has received 434 research payments totaling $1,856,741.

Biography

Dr. Douglas Johnston's specialty is allergy & immunology. Areas of expertise for Dr. Johnston include asthma and allergies.

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Dr. Douglas Thomas Johnston, DO

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. Douglas Thomas Johnston, DO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Douglas Thomas Johnston, DO 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. Douglas Thomas Johnston, DO From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Research Payments

Biography

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