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Dr. John A. Brennan, MD

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Specializes in: Pathology

350 N Grandview Avenue
Dubuque, IA 52001

(563) 589-2431

Dr. John A. Brennan, MD is a pathologist in Dubuque, IA specializing in pathology.

Office Locations

350 N Grandview Avenue
Dubuque, IA 52001

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John A. Brennan, MD treated as a pathologist in Dubuque, IA during 2012 were lab tests, cytology and consultation.

Volume of procedures performed by Dr. John A. Brennan, MD for Medicare patients.

consultation	64
cytology	122
lab tests	195

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John A. Brennan, MD treated as a pathologist in Dubuque, IA during 2013 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. John A. Brennan, MD for Medicare patients.

consultation	59
cytology	58
lab tests	184

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Brennan, MD.

**Gender**
Male	429
Female	392

**Ethnicity**
Non-Hispanic White	808
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	327
From 75 to 84	297
85 and over	105
Less than 65	92

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2013

Hypertension	59
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	22
Depression	15
Chronic Kidney Disease	19
Asthma	5
Osteoperosis	4
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	30
Dementia	8
Cancer	14

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John A. Brennan, MD treated as a pathologist in Dubuque, IA during 2014 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. John A. Brennan, MD for Medicare patients.

consultation	133
cytology	107
lab tests	275

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Brennan, MD.

**Gender**
Male	467
Female	508

**Ethnicity**
Non-Hispanic White	958
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	446
From 75 to 84	312
85 and over	125
Less than 65	92

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2014

Hypertension	60
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	21
Depression	15
Chronic Kidney Disease	17
Asthma	5
Osteoperosis	5
Atrial Fibrilation	10
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	28
Dementia	5
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John A. Brennan, MD treated as a pathologist in Dubuque, IA during 2015 were consultation, lab tests and cytology.

Volume of procedures performed by Dr. John A. Brennan, MD for Medicare patients.

consultation	153
cytology	82
lab tests	106

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Brennan, MD.

**Gender**
Male	1002
Female	938

**Ethnicity**
Non-Hispanic White	1890
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	816
From 75 to 84	692
85 and over	256
Less than 65	176

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2015

Hypertension	66
High Cholesterol	64
Stroke	5
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	22
Asthma	9
Osteoperosis	6
Atrial Fibrilation	13
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	29
Dementia	6
Cancer	15

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John A. Brennan, MD treated as a pathologist in Dubuque, IA during 2016 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. John A. Brennan, MD for Medicare patients.

consultation	83
cytology	66
lab tests	86

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Brennan, MD.

**Gender**
Male	304
Female	334

**Ethnicity**
Non-Hispanic White	615
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	294
From 75 to 84	190
85 and over	80
Less than 65	74

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2016

Hypertension	58
High Cholesterol	57
Stroke	3
Ischemic Heart Disease	21
Depression	22
Chronic Kidney Disease	24
Asthma	15
Osteoperosis	6
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	13
Diabetes	22
Dementia	8
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2016

Volume of procedures performed by Dr. John A. Brennan, MD for Medicare patients.

The highest averages for the top procedures that Dr. John A. Brennan, MD treated as a pathologist in Dubuque, IA were lab tests, consultation and cytology.

consultation	98
cytology	87
lab tests	169

Average Medicare Patient Data From 2012 - 2016

Information about Medicare patients treated by Dr. John A. Brennan, MD.

**Gender**
Male	440
Female	434

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	854
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	298
85 and over	113
Less than 65	86
65 to 74	376

Average of Total of Conditions of Medicare patients treated by Dr. John A. Brennan, MD From 2012 - 2016

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

Hypertension	48
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	17
Depression	14
Chronic Kidney Disease	16
Asthma	6
Osteoporosis	4
Heart Failure	9
Chronic Obstructive Pulmonary Disease	9
Diabetes	21
Atrial Fibrillation	8
Dementia	5
Cancer	12

Education & Training

He has a state license in Iowa.

Licensed In: Iowa

Ratings & Reviews

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Biography

Dr. John Brennan, who practices in Dubuque, IA, is a medical specialist in pathology. Dr. Brennan has obtained a license to practice in Iowa.

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Dr. John A. Brennan, 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 A. Brennan, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John A. Brennan, MD in 2016

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2016

Average Medicare Patient Data From 2012 - 2016

Average of Total of Conditions of Medicare patients treated by Dr. John A. Brennan, MD From 2012 - 2016

Education & Training

Ratings & Reviews

Biography

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