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Dr. Ervin Denham, MD

(29 Ratings)

Specializes in: General Surgery

University of Louisville School of Medicine (1993)

Professional interests include: minimally invasive surgery, inguinal hernia repair, minimally invasive procedures, and more.

7900 Rollins Road Suite B1300
Gurnee, IL 60031

(847) 570-1700

Dr. Ervin Denham, MD is a general surgeon in Evanston, IL specializing in general surgery. He graduated from University of Louisville School of Medicine in 1993 and has 33 years of experience. Dr. Ervin Denham, MD is affiliated with Endeavor Health.

Office Locations

1000 Central Street Suite 717
Evanston, IL 60201

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Endeavor Health

1200 S. York Street Suite 1240
Elmhurst, IL 60126

(331) 221-6140

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225 N. Milwaukee Avenue Lower Level
Vernon Hills, IL 60061

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2650 Ridge Avenue
Evanston, IL 60201

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Endeavor Health

7900 Rollins Road Suite B1300
Gurnee, IL 60031

(847) 570-1700

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Some issues Dr. Ervin Denham, 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.

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.

Noteworthy Medicare Patient Procedures Performed by Dr. Ervin Denham, MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 5%

By Volume:

laparoscopic inguinal hernia repair

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2023, among providers in related specialties within Illinois, Dr. Ervin Denham, MD performed more laparoscopic inguinal hernia repair procedures for Medicare patients than 95% of them and he also had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) that was lower than the list prices billed to Medicare by 95% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 10%

By Volume:

hernia surgery

In 2023, Dr. Ervin Denham, MD performed more hernia surgery procedures for Medicare patients than 90% of providers in related specialties within Illinois.

Top 25%

By Affordability:

laparoscopic surgery

In 2012, Dr. Ervin Denham, MD had a list price for laparoscopic surgery that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Illinois. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

doctor visit	216
hospital care	140
inpatient care	140

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2013 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	14
doctor visit	247
gastrointestinal procedures	14
hospital care	110
inpatient care	110
minimally invasive procedures	14

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	161
Female	176

**Ethnicity**
Non-Hispanic White	287
Black	22
Hispanic	15
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	157
From 75 to 84	79
85 and over	42
Less than 65	59

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2013

Hypertension	74
High Cholesterol	60
Stroke	4
Ischemic Heart Disease	34
Depression	31
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	10
Diabetes	36
Dementia	10
Cancer	14

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2014 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	21
doctor visit	202
gastrointestinal procedures	21
hospital care	159
inpatient care	159
minimally invasive procedures	21

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	173
Female	178

**Ethnicity**
Non-Hispanic White	295
Black	25
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	158
From 75 to 84	96
85 and over	51
Less than 65	46

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2014

Hypertension	70
High Cholesterol	59
Stroke	6
Ischemic Heart Disease	31
Depression	30
Chronic Kidney Disease	29
Asthma	9
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	13
Diabetes	33
Dementia	11
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2015 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	22
doctor visit	182
gastrointestinal procedures	22
hospital care	148
inpatient care	148
minimally invasive procedures	22

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	306
Female	340

**Ethnicity**
Non-Hispanic White	532
Black	50
Hispanic	0
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	270
From 75 to 84	162
85 and over	116
Less than 65	98

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2015

Hypertension	66
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	32
Depression	26
Chronic Kidney Disease	28
Asthma	15
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	11
Diabetes	32
Dementia	11
Cancer	18

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2016 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	22
doctor visit	177
gastrointestinal procedures	22
hospital care	95
inpatient care	95
minimally invasive procedures	22

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	164
Female	163

**Ethnicity**
Non-Hispanic White	273
Black	20
Hispanic	20
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	139
From 75 to 84	93
85 and over	49
Less than 65	46

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2016

Hypertension	64
High Cholesterol	57
Stroke	6
Ischemic Heart Disease	33
Depression	30
Chronic Kidney Disease	30
Asthma	18
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	23
Chronic Obstructive Pulmonary Disease	14
Diabetes	30
Dementia	9
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2017 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	21
doctor visit	167
gastrointestinal procedures	21
hospital care	65
inpatient care	65
minimally invasive procedures	21

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	151
Female	136

**Ethnicity**
Non-Hispanic White	236
Black	19
Hispanic	0
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	138
From 75 to 84	81
85 and over	31
Less than 65	37

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2017

Hypertension	64
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	30
Depression	28
Chronic Kidney Disease	29
Asthma	7
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	24
Dementia	8
Cancer	18

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2018 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	19
doctor visit	164
gastrointestinal procedures	19
hospital care	96
inpatient care	96
minimally invasive procedures	19

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	162
Female	153

**Ethnicity**
Non-Hispanic White	264
Black	21
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	134
From 75 to 84	87
85 and over	53
Less than 65	41

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2018

Hypertension	69
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	35
Depression	33
Chronic Kidney Disease	31
Asthma	10
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	20
Chronic Obstructive Pulmonary Disease	13
Diabetes	32
Dementia	12
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2019 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	33
doctor visit	157
gastrointestinal procedures	33
hospital care	52
inpatient care	52
minimally invasive procedures	33

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	145
Female	113

**Ethnicity**
Non-Hispanic White	205
Black	17
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	125
From 75 to 84	78
85 and over	22
Less than 65	33

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2019

Hypertension	60
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	26
Depression	29
Chronic Kidney Disease	29
Asthma	7
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	8
Diabetes	29
Dementia	11
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2020 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	14
doctor visit	106
gastrointestinal procedures	14
hospital care	95
inpatient care	95
minimally invasive procedures	14

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	132
Female	134

**Ethnicity**
Non-Hispanic White	219
Black	14
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	125
From 75 to 84	74
85 and over	38
Less than 65	29

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2020

Hypertension	67
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	38
Depression	27
Chronic Kidney Disease	38
Asthma	6
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	22
Chronic Obstructive Pulmonary Disease	12
Diabetes	28
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2021 were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	30
doctor visit	204
gastrointestinal procedures	30
hospital care	69
inpatient care	69
minimally invasive procedures	30

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	149
Female	139

**Ethnicity**
Non-Hispanic White	241
Black	14
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	80
85 and over	44
Less than 65	22

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2021

Hypertension	61
High Cholesterol	62
Stroke	5
Ischemic Heart Disease	34
Depression	26
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	17
Chronic Obstructive Pulmonary Disease	8
Diabetes	24
Dementia	13
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL during 2022 were minimally invasive procedures, abdominal surgery, gastrointestinal procedures and hospital care.

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

abdominal surgery	25
doctor visit	169
gastrointestinal procedures	25
hospital care	19
inpatient care	19
minimally invasive procedures	25

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	125
Female	104

**Ethnicity**
Non-Hispanic White	189
Black	13
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	120
From 75 to 84	71
85 and over	14
Less than 65	24

Conditions of Medicare patients treated by Dr. Ervin Denham, MD in 2022

Hypertension	65
High Cholesterol	68
Stroke	8
Ischemic Heart Disease	22
Depression	22
Chronic Kidney Disease	19
Asthma	13
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	28
Dementia	0
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Ervin Denham, MD for Medicare patients.

The highest averages for the top procedures that Dr. Ervin Denham, MD treated as a general surgeon in Evanston, IL were hospital care, inpatient care, minimally invasive procedures and abdominal surgery.

abdominal surgery	22
doctor visit	181
gastrointestinal procedures	22
hospital care	95
inpatient care	95
minimally invasive procedures	22

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Ervin Denham, MD.

**Gender**
Male	151
Female	148

**Ethnicity**
Black / African American	19
Asian / Pacific Islander	0
Non-Hispanic White	249
Native American / Alaskan Native	0
Hispanic	11
Other	3

**Age**
75 to 84	81
85 and over	41
Less than 65	39
65 to 74	137

Average of Total of Conditions of Medicare patients treated by Dr. Ervin Denham, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Ervin Denham, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	60
High Cholesterol	52
Stroke	4
Ischemic Heart Disease	28
Depression	25
Chronic Kidney Disease	26
Asthma	9
Osteoporosis	8
Heart Failure	17
Chronic Obstructive Pulmonary Disease	9
Diabetes	26
Atrial Fibrillation	13
Dementia	8
Cancer	13

Education & Training

Dr. Ervin Denham, MD graduated from University of Louisville School of Medicine in 1993. He completed residency at University of South Florida (USF) Affiliated Hospitals. He is certified by the American Board of Surgery and has a state license in Illinois.

Medical School: University of Louisville School of Medicine (1993)

Residency: University of South Florida (USF) Affiliated Hospitals (2000)

Board Certification: American Board of Surgery (2001)

Licensed In: Illinois

Affiliations & Hospitals

Dr. Ervin Denham, MD is associated with these hospitals and organizations:

Endeavor Health

Ratings & Reviews

Dr. Ervin Denham, MD has an exceptional overall rating with an average of 4.83 out of 5 stars based on 29 ratings. We collect ratings and reviews of Dr. Ervin Denham, MD from all over the web to help you find the right in Evanston, IL.

4.83

Overall Rating

(29 Ratings)

Leave a Review

General Payments

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

**Payments by Company**
Intuitive Surgical, Inc.	$12,495 Da Vinci Surgical System $12,495
TELA Bio, Inc.	$174 OviTex Reinforced Bioscaffold With Permanent Polymer (OviTex) $174
Apollo Endosurgery US Inc	$115 OverStitch Endoscopic Suturing System $115
W. L. Gore & Associates, Inc.	$47 GORE ENFORM Preperitoneal Biomaterial $19	SEAMGUARD Bioabsorbable Staple Line Reinforcement $15	SEAMGUARD Bioabsorbable Staple $12
Covidien Sales LLC	$43 ReliaTack $43
Other	$100 SURGICAL $34	SERI $25	Energy Harmonic $23	Sonicision $18

**Types of Payments**
Education	$10,000
Travel and Lodging	$1,956
Food and Beverage	$1,017

Biography

Dr. Ervin Denham's area of specialization is general surgery. On average, patients gave Dr. Denham a rating of 5.0 stars (out of 5). His areas of expertise include the following: lipoma, laparoscopic sleeve gastrectomy, and gallbladder problems. He attended the University of Louisville School of Medicine and subsequently trained at a hospital affiliated with the University of South Florida (USF) for residency. He is affiliated with Endeavor Health.