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Dr. Michael J. Garren, MD, FACS

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Specializes in: Bariatric Surgery and General Surgery

University of Wisconsin School of Medicine and Public Health

Professional interests include: open inguinal hernia repair, upper gastrointestinal (GI) surgery, laparoscopic inguinal hernia repair, and more.

4602 Eastpark Boulevard
Madison, WI 53718

(608) 265-7090

Dr. Michael J. Garren, MD, FACS is a bariatric surgeon in Madison, WI specializing in bariatric surgery and general surgery. He graduated from University of Wisconsin School of Medicine and Public Health. Dr. Michael J. Garren, MD, FACS is affiliated with U.S. Department of Veterans Affairs and UW Health.

Office Locations

1 S Park Street
Madison, WI 53715

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2500 Overlook Terrace William S. Middleton Mvh (607)
Madison, WI 53705

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UW Health

4602 Eastpark Boulevard
Madison, WI 53718

(608) 265-7090

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Some issues Dr. Michael J. Garren, MD, FACS can help you with:

Weight Loss Surgery (Bariatric Surgery)

Bariatric or weight-loss surgery is a surgical procedure performed to help significantly obese patients lose weight when more traditional methods, such as dieting and exercise, have not helped. Depending on the type, these surgeries change the gastrointestinal tract to limit how much food can be eaten and also change how food is absorbed by the body. Of the various bariatric surgeries available, the most common is gastric bypass.

By far the most common of the gastric bypass surgeries is called Roux-en-Y. During this surgery, part of the stomach and small intestine are detached from the gastrointestinal tract, in order to make the tract smaller. The surgeon divides the stomach into two parts. The working stomach, at the end of the esophagus, is now tiny - only the size of a walnut. This makes patients feel full after eating a small amount of food. Then the small intestine is also divided, and after bypassing a section of the small intestine to reduce food absorption, the intestine is attached to the small stomach pouch. The patient now has a working stomach and intestine like before, only much smaller.

Because gastric bypass is used to treat extreme obesity, it can reduce the risk of some of the problems associated with obesity. Gastric bypass can help treat or reduce the risk for such conditions as heart disease, high blood pressure, sleep apnea, and type 2 diabetes. However, it is a major surgery and also carries risks itself. Any surgery can lead to infection, bleeding, or blood clots, and weight loss surgery in particular carries risks of leaks in the gastrointestinal system, malnutrition, bowel obstructions, and vomiting.

Typically patients are considered candidates for gastric bypass surgery if they have a BMI greater than 40, or sometimes if they have a BMI between 35 and 40 but are suffering from obesity-related illnesses such as diabetes. The outlook is generally good, with most patients losing between 50-75% of their excess weight in 1-2 years. However, patients must follow strict diet guidelines so that the stomach can heal, starting with no food at all, then followed by a liquid diet for some time. For many severely obese patients who have tried strict diets before without success, gastric bypass surgery is the tool that allows them to finally achieve their weight loss and health goals.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2012 were hospital care, inpatient care, lab tests and blood draw.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

blood draw	21
bypass surgery	11
doctor visit	134
gastrointestinal procedures	11
hospital care	46
inpatient care	46
lab tests	28
minimally invasive procedures	11
weight management	11

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2013 were hospital care, inpatient care, minimally invasive procedures and weight management.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

bypass surgery	11
doctor visit	125
gastrointestinal procedures	23
hospital care	51
inpatient care	51
minimally invasive procedures	23
weight management	23

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	69
Female	130

**Ethnicity**
Non-Hispanic White	177
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	29
85 and over	15
Less than 65	67

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2013

Hypertension	67
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	31
Depression	30
Chronic Kidney Disease	27
Asthma	18
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	41
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2014 were minimally invasive procedures, gastrointestinal procedures, lab tests and blood draw.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	17
blood draw	21
bypass surgery	16
doctor visit	163
gastrointestinal procedures	33
hospital care	13
inpatient care	13
lab tests	28
minimally invasive procedures	33
weight management	16

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	83
Female	123

**Ethnicity**
Non-Hispanic White	189
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	102
From 75 to 84	31
85 and over	13
Less than 65	60

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2014

Hypertension	69
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	28
Depression	36
Chronic Kidney Disease	23
Asthma	17
Osteoperosis	7
Atrial Fibrilation	8
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	41
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2015 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	22
doctor visit	143
gastrointestinal procedures	22
minimally invasive procedures	22

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	178
Female	216

**Ethnicity**
Non-Hispanic White	356
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	164
From 75 to 84	0
85 and over	0
Less than 65	150

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2015

Hypertension	61
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	23
Depression	40
Chronic Kidney Disease	21
Asthma	19
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	11
Chronic Obstructive Pulmonary Disease	15
Diabetes	35
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2016 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	21
doctor visit	160
gastrointestinal procedures	21
minimally invasive procedures	21

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	84
Female	93

**Ethnicity**
Non-Hispanic White	159
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	93
From 75 to 84	0
85 and over	0
Less than 65	47

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2016

Hypertension	62
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	30
Depression	31
Chronic Kidney Disease	29
Asthma	21
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	19
Chronic Obstructive Pulmonary Disease	12
Diabetes	28
Dementia	0
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2017 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	20
doctor visit	145
gastrointestinal procedures	20
minimally invasive procedures	20

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	71
Female	93

**Ethnicity**
Non-Hispanic White	148
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	0
85 and over	0
Less than 65	45

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2017

Hypertension	65
High Cholesterol	40
Stroke	0
Ischemic Heart Disease	24
Depression	28
Chronic Kidney Disease	31
Asthma	14
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2018 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	20
doctor visit	151
gastrointestinal procedures	20
minimally invasive procedures	20

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	75
Female	91

**Ethnicity**
Non-Hispanic White	146
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	80
From 75 to 84	43
85 and over	13
Less than 65	30

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2018

Hypertension	65
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	23
Depression	29
Chronic Kidney Disease	29
Asthma	13
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	30
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2019 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	18
doctor visit	154
gastrointestinal procedures	18
minimally invasive procedures	18

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	93
Female	77

**Ethnicity**
Non-Hispanic White	151
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	87
From 75 to 84	42
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2019

Hypertension	58
High Cholesterol	41
Stroke	0
Ischemic Heart Disease	34
Depression	24
Chronic Kidney Disease	28
Asthma	9
Osteoperosis	12
Atrial Fibrilation	11
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	26
Dementia	0
Cancer	6

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2020 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	16
doctor visit	84
gastrointestinal procedures	16
minimally invasive procedures	16

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	68
Female	66

**Ethnicity**
Non-Hispanic White	120
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	71
From 75 to 84	0
85 and over	0
Less than 65	30

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2020

Hypertension	54
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	31
Depression	31
Chronic Kidney Disease	26
Asthma	13
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	11
Chronic Obstructive Pulmonary Disease	8
Diabetes	23
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2021 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	11
doctor visit	83
gastrointestinal procedures	11
minimally invasive procedures	11

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	56
Female	63

**Age**
From 65 to 74	57
From 75 to 84	0
85 and over	0
Less than 65	36

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2021

Hypertension	67
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	29
Depression	34
Chronic Kidney Disease	32
Asthma	14
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	33
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI during 2022 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

abdominal surgery	11
doctor visit	66
gastrointestinal procedures	11
minimally invasive procedures	11

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	45
Female	52

**Age**
From 65 to 74	45
From 75 to 84	29
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2022

Hypertension	72
High Cholesterol	69
Stroke	0
Ischemic Heart Disease	23
Depression	31
Chronic Kidney Disease	21
Asthma	23
Osteoperosis	14
Atrial Fibrilation	25
Heart Failure	12
Chronic Obstructive Pulmonary Disease	18
Diabetes	33
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

doctor visit	82

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	41
Female	48

**Age**
From 65 to 74	41
From 75 to 84	0
85 and over	0
Less than 65	24

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2023

Hypertension	74
High Cholesterol	69
Stroke	0
Ischemic Heart Disease	25
Depression	29
Chronic Kidney Disease	16
Asthma	18
Osteoperosis	0
Atrial Fibrilation	21
Heart Failure	13
Chronic Obstructive Pulmonary Disease	0
Diabetes	27
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Michael J. Garren, MD, FACS for Medicare patients.

The highest averages for the top procedures that Dr. Michael J. Garren, MD, FACS treated as a bariatric surgeon in Madison, WI were hospital care, inpatient care, lab tests and blood draw.

abdominal surgery	17
blood draw	21
bypass surgery	12
doctor visit	124
gastrointestinal procedures	18
hospital care	36
inpatient care	36
lab tests	28
minimally invasive procedures	18
weight management	16

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Michael J. Garren, MD, FACS.

**Gender**
Male	71
Female	87

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	120
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	14
85 and over	3
Less than 65	40
65 to 74	76

Average of Total of Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Michael J. Garren, MD, FACS treated were hypertension, high cholesterol, depression and diabetes.

Hypertension	59
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	25
Depression	28
Chronic Kidney Disease	23
Asthma	14
Osteoporosis	6
Heart Failure	13
Chronic Obstructive Pulmonary Disease	9
Diabetes	28
Atrial Fibrillation	11
Cancer	6
Dementia	0

Education & Training

Dr. Michael J. Garren, MD, FACS graduated from University of Wisconsin School of Medicine and Public Health. He completed residency at University of Wisconsin Affiliated Hospitals. He is certified by the Surgery and has a state license in Wisconsin.

Medical School: University of Wisconsin School of Medicine and Public Health

Residency: University of Wisconsin Affiliated Hospitals

Board Certification: Surgery

Licensed In: Wisconsin

Affiliations & Hospitals

Dr. Michael J. Garren, MD, FACS is associated with these hospitals and organizations:

U.S. Department of Veterans Affairs

UW Health

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Michael J. Garren, MD, FACS. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Intuitive Surgical, Inc.	$15,760 Da Vinci Surgical System $10,260	DAVINCI XI $5,500
Baxter Healthcare	$211 BioSurgery - PERI-STRIPS $150	PerClot $61
Medtronic, Inc.	$94 Signia $94
Ethicon Inc.	$64 Synthetics $64
W. L. Gore & Associates, Inc.	$15 BIO A Tissue Reinforcement $15
Other	$11 CLEVIPREX $11

**Types of Payments**
Education	$9,600
Travel and Lodging	$3,777
Food and Beverage	$1,763
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$1,000
Gift	$16

Biography

Dr. Michael Garren practices general surgery and bariatric surgery. After attending the University of Wisconsin School of Medicine and Public Health for medical school, Dr. Garren completed his residency training at a hospital affiliated with the University of Wisconsin. His areas of expertise include sports hernia (athletic pubalgia), femoral hernia, and incisional hernia. His professional affiliations include UW Health and U.S. Department of Veterans Affairs.

Select Year:

Dr. Michael J. Garren, MD, FACS

Office Locations

Some issues Dr. Michael J. Garren, MD, FACS can help you with:

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. Michael J. Garren, MD, FACS in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Average Medicare Patient Data From 2012 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Michael J. Garren, MD, FACS From 2012 - 2023

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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