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Dr. Thomas E. Bak, MD

(Dr. Thomas Bak, MD)

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Specializes in: Transplant Surgery

Tulane University School of Medicine (1992)

Professional interests include: pancreatic surgery, liver surgery, liver transplant, and more.

12605 E 16th Avenue
Aurora, CO 80045

(720) 848-0833

Dr. Thomas E. Bak, MD is a transplant surgeon in Aurora, CO specializing in transplant surgery. He graduated from Tulane University School of Medicine in 1992 and has 34 years of experience. Dr. Thomas E. Bak, MD is affiliated with UCHealth, University of Colorado Medicine and UNIVERSITY PHYSICIANS INCORPORATED.

Office Locations

12605 E 16th Avenue
Aurora, CO 80045

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1635 Aurora Court 7th Floor
Aurora, CO 80045

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Some issues Dr. Thomas E. Bak, MD can help you with:

Gastrointestinal Problems (Digestive Disorders)

The gastrointestinal system, or GI tract, is the name given to a collection of organs that work together to digest food. These organs fit together in a long tube, running from the mouth to the anus, and include the esophagus, stomach, and intestines, among others. With so many parts working together, complicated by today's busy lifestyles and diets, digestive problems are common. As many as 1 in 3 Americans have a digestive or GI disorder. There are a huge variety of digestive problems, but the most common are IBS, constipation, GERD, hemorrhoids, and ulcers.

IBS, or irritable bowel syndrome, happens when the muscles surrounding the colon contract too easily or frequently. The result is abdominal pain, cramps, diarrhea or constipation, gas and bloating. IBS attacks can often be brought on by specific triggers, so a key part of treatment is learning which foods trigger IBS attacks and avoiding them. Treatment also includes exercise, avoiding stress, and medications if needed.

Constipation, or large, hard, or infrequent stools, happens to everyone at some point. It can be caused by a disruption in routine or food, or by eating a diet without many fresh fruits and vegetables. Although it is uncomfortable, constipation is common and usually not serious, but it can sometimes become chronic. Adding fiber to the diet, exercising, and taking medications may help.

GERD, or gastroesophageal reflux disease, is a severe form of chronic heartburn where stomach acid spills back up into the esophagus. Left untreated, the acid may even eat away at the esophagus and cause serious damage. Treatment includes changing the diet to avoid trigger foods, losing weight if needed, medications, or even surgery.

Hemorrhoids are blood vessels around the rectum that become irritated, swollen or torn while straining during a bowel movement. They are most often caused by constipation, but can also be caused by pregnancy, diarrhea, or simply a genetic predisposition towards hemorrhoids. Treatment involves first treating any constipation issues, then keeping the area clean and soothed until it has healed. If these measures are ineffective, surgery is sometimes used.

Peptic ulcers are sores or spots of inflammation in the lining of the stomach or close to the stomach in the small intestine. Usually this area is coated with a protective lining that shields the tissue from the strong stomach acid, but a break in the lining can let acid in, causing the sores. It used to be thought that stress caused ulcers, but now it is known that is not the case. Most often, they are caused by an infection by H. pylori bacteria, but ulcers can also be caused by alcohol abuse or overuse of aspirin, ibuprofen, naproxen, or other NSAIDS. The symptoms of an ulcer are pain, hunger, nausea, and fatigue.

Gastrointestinal problems, perhaps more than any other area, are markedly affected by lifestyle. Many disorders can be prevented or treated at least in part by eating a healthy diet high in fiber, exercising regularly, drinking enough water, and limiting alcohol intake. Still, the frequency of digestive disorders means that even the healthiest person can be affected by them. Anyone who notices blood in their stool, experiences abdominal pain, unexplained weight loss, or any significant change in bowel movements should see a doctor.

Noteworthy Medicare Patient Procedures Performed by Dr. Thomas E. Bak, MD in 2024

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

Top 5%

By Volume:

laparoscopic donor nephrectomy

In 2024, Dr. Thomas E. Bak, MD performed more laparoscopic donor nephrectomy procedures for Medicare patients than 95% of providers in related specialties within Colorado.

Top 10%

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2024, Dr. Thomas E. Bak, MD 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 90% of providers in related specialties within Colorado. 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. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2012 were urologic procedures, transplant procedures, abdominal surgery and minimally invasive procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	16
doctor visit	16
minimally invasive procedures	11
transplant procedures	16
urologic procedures	27

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2013 were transplant procedures, abdominal surgery and urologic procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	29
doctor visit	17
transplant procedures	29
urologic procedures	29

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	52
Female	19

**Ethnicity**
Non-Hispanic White	35
Black	0
Hispanic	19
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	53

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2013

Hypertension	75
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	39
Depression	30
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	23
Chronic Obstructive Pulmonary Disease	0
Diabetes	52
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2014 were urologic procedures, transplant procedures, abdominal surgery and minimally invasive procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	19
doctor visit	11
minimally invasive procedures	12
transplant procedures	19
urologic procedures	31

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	42
Female	25

**Ethnicity**
Non-Hispanic White	35
Black	0
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	43

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2014

Hypertension	75
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	31
Depression	21
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	19
Chronic Obstructive Pulmonary Disease	0
Diabetes	51
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2015 were urologic procedures, transplant procedures, abdominal surgery and minimally invasive procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	19
doctor visit	11
minimally invasive procedures	14
transplant procedures	19
urologic procedures	33

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	76
Female	64

**Ethnicity**
Non-Hispanic White	80
Black	0
Hispanic	38
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	94

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2015

Hypertension	75
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	30
Depression	30
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	24
Chronic Obstructive Pulmonary Disease	0
Diabetes	47
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2016 were hospital care and inpatient care.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

hospital care	36
inpatient care	36

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	31
Female	32

**Ethnicity**
Non-Hispanic White	49
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	37

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2016

Hypertension	75
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	37
Depression	30
Chronic Kidney Disease	75
Asthma	22
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	24
Chronic Obstructive Pulmonary Disease	0
Diabetes	37
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2017 were hospital care, inpatient care, urologic procedures and minimally invasive procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	11
doctor visit	35
hospital care	122
inpatient care	122
minimally invasive procedures	21
open surgery	11
stent placement (stenting)	11
transplant procedures	11
urologic procedures	43

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	54
Female	49

**Ethnicity**
Non-Hispanic White	64
Black	0
Hispanic	26
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	70

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2017

Hypertension	75
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	40
Depression	31
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	29
Chronic Obstructive Pulmonary Disease	0
Diabetes	43
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2018 were hospital care, inpatient care, urologic procedures and transplant procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	22
doctor visit	43
hospital care	138
inpatient care	138
minimally invasive procedures	15
open surgery	22
stent placement (stenting)	22
transplant procedures	22
urologic procedures	59

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	78
Female	52

**Ethnicity**
Non-Hispanic White	60
Black	0
Hispanic	47
Asian	0
Other	0
Native American	0

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

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2018

Hypertension	75
High Cholesterol	68
Stroke	0
Ischemic Heart Disease	39
Depression	25
Chronic Kidney Disease	75
Asthma	9
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	31
Chronic Obstructive Pulmonary Disease	16
Diabetes	48
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2019 were hospital care, inpatient care, urologic procedures and transplant procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	21
doctor visit	49
hospital care	119
inpatient care	119
minimally invasive procedures	14
open surgery	20
stent placement (stenting)	20
transplant procedures	21
urologic procedures	55

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	74
Female	42

**Ethnicity**
Non-Hispanic White	64
Black	0
Hispanic	31
Asian	0
Other	0
Native American	0

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

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2019

Hypertension	75
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	35
Depression	20
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	35
Chronic Obstructive Pulmonary Disease	0
Diabetes	55
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2020 were hospital care, inpatient care, urologic procedures and transplant procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	19
doctor visit	51
hospital care	79
inpatient care	79
minimally invasive procedures	16
open surgery	19
stent placement (stenting)	19
transplant procedures	19
urologic procedures	54

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	74
Female	57

**Ethnicity**
Non-Hispanic White	78
Black	0
Hispanic	27
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	94

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2020

Hypertension	75
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	38
Depression	24
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	8
Atrial Fibrilation	0
Heart Failure	22
Chronic Obstructive Pulmonary Disease	9
Diabetes	44
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2021 were hospital care, inpatient care, urologic procedures and transplant procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

abdominal surgery	18
doctor visit	35
hospital care	51
inpatient care	51
minimally invasive procedures	13
open surgery	18
stent placement (stenting)	18
transplant procedures	18
urologic procedures	49

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	62
Female	39

**Ethnicity**
Non-Hispanic White	57
Black	0
Hispanic	23
Asian	0
Other	0
Native American	0

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

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2021

Hypertension	75
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	53
Depression	29
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	27
Chronic Obstructive Pulmonary Disease	0
Diabetes	55
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2022 were hospital care and inpatient care.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

doctor visit	18
hospital care	29
inpatient care	29

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	37
Female	24

**Ethnicity**
Non-Hispanic White	28
Black	0
Hispanic	20
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	24
From 75 to 84	0
85 and over	0
Less than 65	37

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2022

Hypertension	75
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	21
Depression	41
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	25
Chronic Obstructive Pulmonary Disease	0
Diabetes	46
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	23
Female	12

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

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	20

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2023

Hypertension	75
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	49
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO during 2024 were hospital care, inpatient care, minimally invasive procedures and urologic procedures.

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

hospital care	24
inpatient care	24
minimally invasive procedures	11
urologic procedures	11

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	30
Female	15

**Ethnicity**
Non-Hispanic White	27
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	34

Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	42
Depression	33
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	31
Chronic Obstructive Pulmonary Disease	0
Diabetes	53
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Thomas E. Bak, MD for Medicare patients.

The highest averages for the top procedures that Dr. Thomas E. Bak, MD treated as a transplant surgeon in Aurora, CO were hospital care, inpatient care, urologic procedures and transplant procedures.

abdominal surgery	19
doctor visit	28
hospital care	74
inpatient care	74
minimally invasive procedures	14
open surgery	18
stent placement (stenting)	18
transplant procedures	19
urologic procedures	39

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Thomas E. Bak, MD.

**Gender**
Male	48
Female	33

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	46
Hispanic	19
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	0
85 and over	0
Less than 65	55
65 to 74	1

Average of Total of Conditions of Medicare patients treated by Dr. Thomas E. Bak, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Thomas E. Bak, MD treated were chronic kidney disease, hypertension, high cholesterol and diabetes.

Hypertension	69
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	31
Depression	24
Chronic Kidney Disease	69
Asthma	5
Osteoporosis	0
Heart Failure	22
Chronic Obstructive Pulmonary Disease	1
Diabetes	44
Atrial Fibrillation	0
Dementia	0
Cancer	0

Education & Training

Dr. Thomas E. Bak, MD graduated from Tulane University School of Medicine in 1992. He completed residency at University of Colorado Denver Affiliated Hospitals. He has a state license in Colorado.

Medical School: Tulane University School of Medicine (1992)

Residency: University of Colorado Denver Affiliated Hospitals (1998)

Licensed In: Colorado

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General Payments

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

**Payments by Company**
Intuitive Surgical, Inc.	$4,996 Da Vinci Surgical System $4,996
NeuWave Medical, Inc.	$767 CERTUS 140 MICROWAVE ABLATION SYSTEM $767
Ethicon US, LLC	$544 Echelon Flex $236	SURGICEL NU-KNIT $148	VISTASEAL $144	HARMONIC Product Family $15
Veloxis Pharmaceuticals, Inc.	$296 Envarsus $296
Novartis Pharmaceuticals Corporation	$89 $89

**Types of Payments**
Education	$3,000
Travel and Lodging	$2,404
Food and Beverage	$1,288

Biography

Dr. Thomas Bak specializes in transplant surgery. Dr. Bak has indicated that his clinical interests include gastrointestinal problems (digestive disorders), pancreas transplant, and biliary disorders (gallbladder and bile ducts). After completing medical school at Tulane University School of Medicine, he performed his residency at a hospital affiliated with the University of Colorado Denver. His professional affiliations include the University of Colorado Hospital and the University of Colorado Medicine.