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Dr. John Waldron McCahan, MD

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Specializes in: Adult Rheumatology

931 Highland Boulevard Suite 3260
Bozeman, MT 59715

(406) 414-5198

Dr. John Waldron McCahan, MD is a rheumatologist in Bozeman, MT specializing in adult rheumatology.

Office Locations

931 Highland Boulevard Suite 3260
Bozeman, MT 59715

(406) 414-5198

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2012 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	54
doctor visit	656
injections	54

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2013 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	105
doctor visit	606
injections	105

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	93
Female	151

**Age**
From 65 to 74	118
From 75 to 84	67
85 and over	15
Less than 65	44

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2013

Hypertension	41
High Cholesterol	23
Stroke	0
Ischemic Heart Disease	16
Depression	21
Chronic Kidney Disease	14
Asthma	6
Osteoperosis	15
Atrial Fibrilation	7
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	13
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2014 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	58
doctor visit	453
injections	58

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	84
Female	150

**Age**
From 65 to 74	106
From 75 to 84	77
85 and over	13
Less than 65	38

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2014

Hypertension	45
High Cholesterol	23
Stroke	0
Ischemic Heart Disease	17
Depression	21
Chronic Kidney Disease	15
Asthma	10
Osteoperosis	24
Atrial Fibrilation	10
Heart Failure	14
Chronic Obstructive Pulmonary Disease	12
Diabetes	13
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2015 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	59
doctor visit	639
injections	59

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	218
Female	396

**Ethnicity**
Non-Hispanic White	590
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	310
From 75 to 84	160
85 and over	42
Less than 65	102

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2015

Hypertension	36
High Cholesterol	18
Stroke	6
Ischemic Heart Disease	18
Depression	24
Chronic Kidney Disease	12
Asthma	9
Osteoperosis	19
Atrial Fibrilation	5
Heart Failure	11
Chronic Obstructive Pulmonary Disease	11
Diabetes	13
Dementia	4
Cancer	8

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2016 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	61
doctor visit	616
injections	61

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	124
Female	203

**Ethnicity**
Non-Hispanic White	314
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	159
From 75 to 84	101
85 and over	25
Less than 65	42

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2016

Hypertension	39
High Cholesterol	23
Stroke	0
Ischemic Heart Disease	16
Depression	22
Chronic Kidney Disease	14
Asthma	17
Osteoperosis	19
Atrial Fibrilation	6
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	14
Dementia	3
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2017 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	45
doctor visit	584
injections	45

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	129
Female	204

**Ethnicity**
Non-Hispanic White	322
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	157
From 75 to 84	105
85 and over	23
Less than 65	48

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2017

Hypertension	49
High Cholesterol	20
Stroke	0
Ischemic Heart Disease	20
Depression	26
Chronic Kidney Disease	21
Asthma	9
Osteoperosis	17
Atrial Fibrilation	7
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	15
Dementia	6
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2018 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	42
doctor visit	649
injections	42

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	148
Female	245

**Ethnicity**
Non-Hispanic White	377
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	201
From 75 to 84	111
85 and over	27
Less than 65	54

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2018

Hypertension	45
High Cholesterol	25
Stroke	0
Ischemic Heart Disease	21
Depression	21
Chronic Kidney Disease	17
Asthma	8
Osteoperosis	13
Atrial Fibrilation	8
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	13
Dementia	5
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2019 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	48
doctor visit	698
injections	48

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	148
Female	263

**Ethnicity**
Non-Hispanic White	392
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	224
From 75 to 84	111
85 and over	24
Less than 65	52

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2019

Hypertension	43
High Cholesterol	26
Stroke	0
Ischemic Heart Disease	20
Depression	23
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	16
Atrial Fibrilation	6
Heart Failure	9
Chronic Obstructive Pulmonary Disease	9
Diabetes	13
Dementia	4
Cancer	7

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2020 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	42
doctor visit	630
injections	42

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	148
Female	258

**Ethnicity**
Non-Hispanic White	390
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	227
From 75 to 84	107
85 and over	26
Less than 65	46

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2020

Hypertension	41
High Cholesterol	25
Stroke	3
Ischemic Heart Disease	20
Depression	23
Chronic Kidney Disease	17
Asthma	5
Osteoperosis	16
Atrial Fibrilation	6
Heart Failure	9
Chronic Obstructive Pulmonary Disease	8
Diabetes	16
Dementia	4
Cancer	7

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2021 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	48
doctor visit	696
injections	48

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	163
Female	259

**Ethnicity**
Non-Hispanic White	404
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	227
From 75 to 84	120
85 and over	29
Less than 65	46

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2021

Hypertension	47
High Cholesterol	27
Stroke	4
Ischemic Heart Disease	20
Depression	23
Chronic Kidney Disease	20
Asthma	5
Osteoperosis	18
Atrial Fibrilation	5
Heart Failure	8
Chronic Obstructive Pulmonary Disease	7
Diabetes	16
Dementia	5
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT during 2022 were aspiration and injections.

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

aspiration	50
doctor visit	622
injections	50

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Male	148
Female	233

**Ethnicity**
Non-Hispanic White	359
Black	0
Hispanic	0
Asian	0
Other	11
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	118
85 and over	25
Less than 65	34

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2022

Hypertension	57
High Cholesterol	43
Stroke	4
Ischemic Heart Disease	15
Depression	22
Chronic Kidney Disease	12
Asthma	9
Osteoperosis	27
Atrial Fibrilation	12
Heart Failure	8
Chronic Obstructive Pulmonary Disease	11
Diabetes	14
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John Waldron McCahan, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Waldron McCahan, MD treated as a rheumatologist in Bozeman, MT were aspiration and injections.

aspiration	55
doctor visit	622
injections	55

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Waldron McCahan, MD.

**Gender**
Female	214
Male	127

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	286
Hispanic	0
Native American / Alaskan Native	0
Other	1

**Age**
85 and over	22
75 to 84	97
Less than 65	46
65 to 74	175

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

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

Hypertension	40
High Cholesterol	23
Stroke	1
Ischemic Heart Disease	16
Depression	20
Chronic Kidney Disease	14
Asthma	7
Osteoporosis	16
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	12
Atrial Fibrillation	6
Dementia	2
Cancer	7

Education & Training

He has a state license in Montana.

Licensed In: Montana

Ratings & Reviews

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General Payments

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

**Payments by Company**
AbbVie Inc.	$218 Rinvoq $185	Skyrizi $17	Humira $16
AbbVie, Inc.	$144 Humira $144
Horizon Pharma plc	$137 KRYSTEXXA $137
Lilly USA, LLC	$75 FORTEO $75
Questcor Pharmaceuticals	$47 ACTHAR $47
Other	$117 AUBAGIO $40	Enbrel $21	PLEGRIDY $15	Actemra $15	Cimzia $13	Other $13

**Types of Payments**
Food and Beverage	$654
Education	$83

Biography

Dr. John McCahan's area of specialization is adult rheumatology. He studied medicine at Temple University School of Medicine.

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Dr. John Waldron McCahan, 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 Waldron McCahan, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Waldron McCahan, MD 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. John Waldron McCahan, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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