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Home > CA Providers > Bariatric Surgeons

Dr. Marc M. Zare, MD

Accepting New Patients

(5 Ratings)

Specializes in: Bariatric Surgery and General Surgery

Kasturba Medical College

Professional interests include: minimally invasive surgery, robotic surgery, obesity, and more.

15965 Los Gatos Boulevard Suite 201
Los Gatos, CA 95032

(408) 402-6276

Dr. Marc M. Zare, MD is a bariatric surgeon in Los Gatos, CA specializing in bariatric surgery and general surgery. He graduated from Kasturba Medical College. Dr. Marc M. Zare, MD is affiliated with El Camino Health and Good Samaritan Hospital.

Office Locations

15965 Los Gatos Boulevard Suite 201
Los Gatos, CA 95032

(408) 402-6276

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Some issues Dr. Marc M. Zare, MD can help you with:

Gastric Bypass Surgery

Gastric bypass surgery is a procedure that promotes weight loss by reducing the stomach and altering how the digestive system absorbs and processes food. The procedure treats morbid obesity, where one's weight impairs day-to-day function or poses serious health risks. Gastric bypass surgery is used only after other weight loss treatments are unsuccessful.

Generally, gastric bypass surgery is performed on patients who have a BMI of 40 or greater, or a BMI of 35 or greater with a weight-related health condition such as type 2 diabetes. Bariatric surgeons frequently expect patients to first attempt natural weight loss for about six months to prove to the surgeon that the patient is capable of maintaining a post-surgery diet and exercise regimen.

For obese patients, gastric bypass surgery has many potential health and weight benefits. Gastric bypass surgery restricts the amount of food the stomach contains, as well as:

Reduces the calories the stomach absorbs
Alters gastrointestinal hormones, which help to heal obesity-induced metabolic syndrome
Suppresses appetite
Alleviates conditions caused or exacerbated by obesity, such as obstructive sleep apnea, heart disease, and type 2 diabetes
Contributes to mental health by improving self-esteem

During gastric bypass surgery, the stomach is stapled to reduce its size, and a small hole is created in the stomach and attached to the middle section of the small intestine. This direct connection between the stomach and the middle of the small intestine creates a channel for some food to bypass the normal route. By bypassing the upper small intestine and larger region of the stomach, food is not fully absorbed and patients do not retain the same amount of calories as before. This procedure is also sometimes referred to as "Roux-en-Y" gastric bypass surgery. Some bariatric surgeons may perform a "laparoscopic bypass" which uses a tiny camera (laparoscope) to guide the procedure.

Gastric bypass surgery is performed with general anesthesia and as preparation, a liquid diet is required for two weeks prior to undergoing the surgery. After the surgery, patients will spend about two days in the hospital and may miss work for two to three weeks. In the first month after the surgery, patients are only able to consume small portions of liquid or soft food. Even after reintroducing solid food, patients feel full quickly, sometimes after eating just two or three tablespoons. Some patients experience "dumping syndrome" (rapid processing of food into the small intestine), which is common during the recovery process. Gastric bypass surgery patients must also make permanent lifestyle changes. For example, gastric bypass patients are required to take vitamins for life after surgery and required to forever avoid certain foods, such as alcohol, sugar, and high fat food.

While the gastric bypass recovery process can be challenging, surgery results are usually swift: most gastric bypass surgery patients lose nearly half to two thirds of their starting weight within two years of surgery.

Laparoscopic Surgery

Laparoscopic surgery is a kind of minimally invasive surgery using a thin, narrow tube called a laparoscope. Usually performed on the abdomen or the pelvic region, the surgeon makes a few very small incisions instead of one large one.

During the procedure, the surgeon inserts the laparoscope, which contains a light and camera that allows the surgeon to see what is happening inside the body. Then tiny tools are placed through the small openings and used to perform the surgery.

The most common laparoscopic surgery is gallbladder removal, but laparoscopic surgery may also be used for the removal of a kidney or appendix, to treat certain cysts and tumors, for bariatric surgery, for some GERD treatments, or for hernia repairs, among others.

Because laparoscopic surgery only uses a few tiny incisions, the scars are minimal and recovery is easier than with open surgery.

Robotic Surgery

Robotic surgery is a type of minimally invasive surgery, using a tiny opening to get inside the body instead of making a large cut. It uses small tools attached to a thin robotic arm, which is controlled by the surgeon. Robotic surgery may be referred to by the specific kind of robot that is used. The most advanced robot currently in use is called the da Vinci, and surgery using it is sometimes called da Vinci surgery.

There are many benefits to robotic surgery, both for the patient and the surgeon. Robotic surgery allows for more precise movements and increased control during very delicate surgical procedures. This makes performing surgery accurately much easier for surgeons and reduces fatigue. The smaller 'hand' of the robot can enter the body via a much smaller opening, which reduces the risk of infection and scarring and leads to a faster recovery. The robotic hands also contain tiny moveable cameras among their tools, giving surgeons a much closer view of the procedure than would be possible with traditional surgery.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

doctor visit	49

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2013 were minimally invasive procedures, gastrointestinal procedures, abdominal surgery and hospital care.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	19
doctor visit	94
gastrointestinal procedures	30
hospital care	17
inpatient care	17
minimally invasive procedures	30

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	60
Female	59

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

**Age**
From 65 to 74	63
From 75 to 84	33
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2013

Hypertension	71
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	32
Depression	16
Chronic Kidney Disease	18
Asthma	0
Osteoperosis	0
Atrial Fibrilation	16
Heart Failure	17
Chronic Obstructive Pulmonary Disease	11
Diabetes	24
Dementia	0
Cancer	24

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2014 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	16
doctor visit	87
gastrointestinal procedures	16
minimally invasive procedures	16

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	58
Female	57

**Ethnicity**
Non-Hispanic White	93
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	73
From 75 to 84	28
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2014

Hypertension	65
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	31
Depression	17
Chronic Kidney Disease	18
Asthma	14
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	0
Diabetes	23
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2015 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	18
doctor visit	110
gastrointestinal procedures	18
minimally invasive procedures	18

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	122
Female	96

**Ethnicity**
Non-Hispanic White	168
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	124
From 75 to 84	50
85 and over	22
Less than 65	22

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2015

Hypertension	72
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	33
Depression	21
Chronic Kidney Disease	27
Asthma	11
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	17
Chronic Obstructive Pulmonary Disease	13
Diabetes	34
Dementia	0
Cancer	24

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2016 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	11
doctor visit	151
gastrointestinal procedures	22
hospital care	14
inpatient care	14
minimally invasive procedures	22

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	60
Female	75

**Ethnicity**
Non-Hispanic White	105
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	75
From 75 to 84	35
85 and over	11
Less than 65	14

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2016

Hypertension	70
High Cholesterol	66
Stroke	0
Ischemic Heart Disease	30
Depression	20
Chronic Kidney Disease	27
Asthma	21
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	11
Diabetes	36
Dementia	10
Cancer	21

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2017 were minimally invasive procedures, gastrointestinal procedures and abdominal surgery.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	19
doctor visit	178
gastrointestinal procedures	35
minimally invasive procedures	35

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	78
Female	86

**Ethnicity**
Non-Hispanic White	130
Black	0
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	99
From 75 to 84	38
85 and over	15
Less than 65	12

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2017

Hypertension	70
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	30
Depression	20
Chronic Kidney Disease	28
Asthma	15
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	17
Chronic Obstructive Pulmonary Disease	11
Diabetes	31
Dementia	0
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2018 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	23
doctor visit	186
gastrointestinal procedures	23
minimally invasive procedures	23

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	87
Female	87

**Ethnicity**
Non-Hispanic White	139
Black	0
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	96
From 75 to 84	40
85 and over	21
Less than 65	17

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2018

Hypertension	68
High Cholesterol	70
Stroke	6
Ischemic Heart Disease	28
Depression	18
Chronic Kidney Disease	22
Asthma	10
Osteoperosis	6
Atrial Fibrilation	14
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	31
Dementia	0
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2019 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	23
doctor visit	221
gastrointestinal procedures	23
minimally invasive procedures	23

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	89
Female	89

**Ethnicity**
Non-Hispanic White	144
Black	0
Hispanic	0
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	45
85 and over	14
Less than 65	15

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2019

Hypertension	69
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	31
Depression	17
Chronic Kidney Disease	21
Asthma	12
Osteoperosis	8
Atrial Fibrilation	8
Heart Failure	16
Chronic Obstructive Pulmonary Disease	10
Diabetes	29
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2020 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	24
doctor visit	169
gastrointestinal procedures	24
minimally invasive procedures	24

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	91
Female	69

**Ethnicity**
Non-Hispanic White	127
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	84
From 75 to 84	49
85 and over	16
Less than 65	11

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2020

Hypertension	66
High Cholesterol	66
Stroke	0
Ischemic Heart Disease	33
Depression	18
Chronic Kidney Disease	23
Asthma	10
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	25
Dementia	0
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2021 were minimally invasive procedures, gastrointestinal procedures and abdominal surgery.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	19
doctor visit	160
gastrointestinal procedures	30
minimally invasive procedures	30

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	85
Female	58

**Ethnicity**
Non-Hispanic White	108
Black	0
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	38
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2021

Hypertension	63
High Cholesterol	72
Stroke	0
Ischemic Heart Disease	32
Depression	19
Chronic Kidney Disease	17
Asthma	13
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	17
Chronic Obstructive Pulmonary Disease	9
Diabetes	24
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2022 were abdominal surgery, gastrointestinal procedures, minimally invasive procedures and open surgery.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	42
doctor visit	167
gastrointestinal procedures	42
minimally invasive procedures	25
open surgery	17

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	92
Female	74

**Ethnicity**
Non-Hispanic White	128
Black	0
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	58
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	38
Depression	17
Chronic Kidney Disease	18
Asthma	14
Osteoperosis	9
Atrial Fibrilation	22
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	29
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2023 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	32
doctor visit	202
gastrointestinal procedures	32
minimally invasive procedures	32

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	92
Female	77

**Ethnicity**
Non-Hispanic White	135
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	60
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2023

Hypertension	74
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	31
Depression	15
Chronic Kidney Disease	13
Asthma	15
Osteoperosis	13
Atrial Fibrilation	20
Heart Failure	12
Chronic Obstructive Pulmonary Disease	9
Diabetes	32
Dementia	0
Cancer	18

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA during 2024 were minimally invasive procedures, abdominal surgery and gastrointestinal procedures.

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

abdominal surgery	24
doctor visit	165
gastrointestinal procedures	24
minimally invasive procedures	24

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Male	82
Female	61

**Ethnicity**
Non-Hispanic White	106
Black	0
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	74
From 75 to 84	50
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Marc M. Zare, MD in 2024

Hypertension	69
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	29
Depression	16
Chronic Kidney Disease	13
Asthma	13
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	11
Chronic Obstructive Pulmonary Disease	8
Diabetes	24
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Marc M. Zare, MD for Medicare patients.

The highest averages for the top procedures that Dr. Marc M. Zare, MD treated as a bariatric surgeon in Los Gatos, CA were gastrointestinal procedures, minimally invasive procedures, abdominal surgery and open surgery.

abdominal surgery	22
doctor visit	149
gastrointestinal procedures	26
hospital care	15
inpatient care	15
minimally invasive procedures	25
open surgery	17

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Marc M. Zare, MD.

**Gender**
Female	68
Male	76

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	1
Non-Hispanic White	113
Native American / Alaskan Native	0
Hispanic	10
Other	0

**Age**
85 and over	7
75 to 84	40
Less than 65	7
65 to 74	80

Average of Total of Conditions of Medicare patients treated by Dr. Marc M. Zare, MD From 2012 - 2024

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

Hypertension	64
High Cholesterol	62
Stroke	2
Ischemic Heart Disease	29
Depression	16
Chronic Kidney Disease	18
Asthma	11
Osteoporosis	5
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	26
Atrial Fibrillation	11
Cancer	15
Dementia	1

Education & Training

Dr. Marc M. Zare, MD graduated from Kasturba Medical College. He completed residency at Georgetown University Hospital. He has a state license in Massachusetts.

Medical School: Kasturba Medical College

Residency: Georgetown University Hospital

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Marc M. Zare, MD is associated with these hospitals and organizations:

El Camino Health

Good Samaritan Hospital

Ratings & Reviews

Dr. Marc M. Zare, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. Marc M. Zare, MD from all over the web to help you find the right in Los Gatos, CA.

Overall Rating

(5 Ratings)

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General Payments

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

**Payments by Company**
Davol Inc.	$1,143 PHASIX $7	$1,136
Medtronic, Inc.	$254 Signia $254
Intuitive Surgical, Inc.	$205 Da Vinci Surgical System $205
Mallinckrodt Enterprises LLC	$121 OFIRMEV $121
Covidien Sales LLC	$118 Vessel Sealing $64	Endo Stapling $54
Other	$155 Endoscopy Endocutters $43	Mesh $31	Advanced Wound care $30	Energy Enseal $19	Exparel $12	Other $18

**Types of Payments**
Food and Beverage	$1,237
Travel and Lodging	$743
Education	$16

Biography

Dr. Marc Zare specializes in general surgery and bariatric surgery. His average patient rating is 4.0 stars (out of 5). His areas of expertise include the following: laparoscopic sleeve gastrectomy, duodenal switch, and roux-en-y gastric bypass. Dr. Zare attended Kasturba Medical College and then went on to complete his residency at Georgetown University Hospital and a hospital affiliated with the University of North Carolina (UNC). In addition to English, he speaks Persian. He is affiliated with Good Samaritan Hospital and El Camino Health. According to El Camino Health, Dr. Zare is currently accepting new patients at his office in LOS GATOS, CA.