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Dr. Brian M. Oleary, MD

Accepting New Patients

(Dr. Brian O'Leary, MD)

(426 Ratings)

Specializes in: Internal Medicine (Adult Medicine)

Northwestern University, Feinberg School of Medicine (1985)

Professional interests include: hypertension (high blood pressure), diabetes, heart problems

4205 Westbrook Drive
Aurora, IL 60504

(630) 527-1818

Dr. Brian M. Oleary, MD is an internist in Aurora, IL specializing in internal medicine (adult medicine). He graduated from Northwestern University, Feinberg School of Medicine in 1985 and has 41 years of experience. Dr. Brian M. Oleary, MD is affiliated with Endeavor Health, Duly Health and Care and DUPAGE MEDICAL GROUP LTD.

Office Locations

4205 Westbrook Drive
Aurora, IL 60504

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Some issues Dr. Brian M. Oleary, MD can help you with:

Heart Problems

The heart is one of the most important organs in the body. This smooth muscle expands and contracts rhythmically an entire lifetime, pumping blood to the lungs and then to every other cell in the body. When heart problems occur, it becomes difficult for the body to get the nutrients and oxygen it needs via the blood. So while there are a variety of illnesses and disorders that affect the heart, most of them cause weakness, exhaustion and shortness of breath. The most common heart conditions include heart disease, angina, arrhythmia, and valve disorders.

Heart disease is the leading cause of death in the United States for both men and women. This includes coronary artery disease, heart attacks, congestive heart failure, and congenital heart disease. Some conditions, such as genetics, cannot be controlled. But there are many other things one can do to lower their risk for heart disease. Controlling high blood pressure and cholesterol levels, reducing or stopping smoking, exercising more and losing weight if needed, and eating a diet low in sodium can all protect the heart.

Angina is a squeezing type of chest pain that happens when the muscles around the heart don't get enough oxygen. It can be regular or infrequent. Usually, angina is caused by coronary heart disease. However, not all chest pain is angina. Chest pain can also be caused by a lung infection or panic attack, for example, so it is important to have any sudden pain checked.

Arrhythmia is the word for when the heart beats too fast, too slow, or irregularly with skipped beats. It can feel frightening, and depending on the type it can be dangerous, but in most cases arrhythmia is not serious and can be treated. It is very common, especially in older adults.

Heart valve problems can happen in any one of the the heart's four valves that keep blood flowing where it needs to go. Babies can be born with problems in their heart valves, or valves can be damaged by infections. The valves can stiffen and become less mobile, or they can stop closing properly and 'leak' when the heart beats. Valve problems can usually be repaired surgically.

Noteworthy Medicare Patient Procedures Performed by Dr. Brian M. Oleary, MD in 2023

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

Top 10%

By Affordability:

iron tests

vitamin B12 test

In 2023, Dr. Brian M. Oleary, MD had a list price for iron tests, and vitamin B12 test that was lower than the list prices billed to Medicare by 90% 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.

Top 25%

By Volume:

blood tests

preventive care

By Affordability:

albumin test

cholesterol screening

creatinine test

creatinine urine test

kidney function tests

lipid profile

microalbumin test

microalbumin urine test

vitamin D test

In 2012, among providers in related specialties within Illinois, Dr. Brian M. Oleary, MD performed more blood tests, and preventive care procedures for Medicare patients than 75% of them and he also had a list price for albumin test, cholesterol screening, creatinine test, creatinine urine test, kidney function tests, lipid profile, microalbumin test, microalbumin urine test, and vitamin D test that was lower than the list prices billed to Medicare by 75% 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.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2012 were rehabilitation, hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	31
diagnostic evaluation	25
doctor visit	1166
hospital care	415
inpatient care	415
lab tests	215
manual therapy	142
preventive care	160
rehabilitation	463
vaccines	146

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2013 were blood draw and lab tests.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	95
doctor visit	130
lab tests	26

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	53
Female	60

**Ethnicity**
Non-Hispanic White	97
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	54
From 75 to 84	36
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2013

Hypertension	73
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	36
Depression	18
Chronic Kidney Disease	24
Asthma	0
Osteoperosis	0
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	40
Dementia	0
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2014 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	258
diabetes management	64
doctor visit	387
lab tests	327
preventive care	114
vaccines	25

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	58
Female	77

**Ethnicity**
Non-Hispanic White	114
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	60
From 75 to 84	37
85 and over	20
Less than 65	18

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2014

Hypertension	75
High Cholesterol	69
Stroke	0
Ischemic Heart Disease	42
Depression	44
Chronic Kidney Disease	44
Asthma	16
Osteoperosis	10
Atrial Fibrilation	19
Heart Failure	34
Chronic Obstructive Pulmonary Disease	22
Diabetes	54
Dementia	20
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2015 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	579
diabetes management	150
doctor visit	834
lab tests	756
preventive care	245
vaccines	45

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	168
Female	256

**Ethnicity**
Non-Hispanic White	358
Black	26
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	162
From 75 to 84	132
85 and over	72
Less than 65	58

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2015

Hypertension	75
High Cholesterol	62
Stroke	8
Ischemic Heart Disease	41
Depression	41
Chronic Kidney Disease	43
Asthma	21
Osteoperosis	9
Atrial Fibrilation	25
Heart Failure	34
Chronic Obstructive Pulmonary Disease	19
Diabetes	52
Dementia	21
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2016 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	745
diabetes management	196
doctor visit	942
lab tests	1056
preventive care	331
vaccines	66

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	92
Female	126

**Ethnicity**
Non-Hispanic White	178
Black	15
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	69
85 and over	33
Less than 65	35

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2016

Hypertension	75
High Cholesterol	55
Stroke	9
Ischemic Heart Disease	42
Depression	36
Chronic Kidney Disease	49
Asthma	25
Osteoperosis	11
Atrial Fibrilation	24
Heart Failure	36
Chronic Obstructive Pulmonary Disease	22
Diabetes	58
Dementia	17
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2017 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	241
diabetes management	81
doctor visit	368
lab tests	467
preventive care	150
thyroid function tests	21
vaccines	33

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	49
Female	52

**Ethnicity**
Non-Hispanic White	77
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	33
From 75 to 84	32
85 and over	15
Less than 65	21

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2017

Hypertension	75
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	37
Depression	36
Chronic Kidney Disease	54
Asthma	13
Osteoperosis	11
Atrial Fibrilation	25
Heart Failure	39
Chronic Obstructive Pulmonary Disease	22
Diabetes	52
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2018 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	240
diabetes management	101
doctor visit	344
lab tests	447
preventive care	172
thyroid function tests	36
vaccines	25

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	55
Female	54

**Ethnicity**
Non-Hispanic White	83
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	41
From 75 to 84	33
85 and over	15
Less than 65	20

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2018

Hypertension	73
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	41
Depression	34
Chronic Kidney Disease	56
Asthma	0
Osteoperosis	10
Atrial Fibrilation	21
Heart Failure	37
Chronic Obstructive Pulmonary Disease	20
Diabetes	46
Dementia	20
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2019 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	226
diabetes management	96
doctor visit	351
lab tests	447
preventive care	151
thyroid function tests	27
vaccines	21

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	61
Female	70

**Ethnicity**
Non-Hispanic White	101
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	54
From 75 to 84	40
85 and over	19
Less than 65	18

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2019

Hypertension	73
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	44
Depression	39
Chronic Kidney Disease	56
Asthma	13
Osteoperosis	14
Atrial Fibrilation	20
Heart Failure	31
Chronic Obstructive Pulmonary Disease	21
Diabetes	47
Dementia	20
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2020 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	216
diabetes management	75
doctor visit	263
lab tests	497
preventive care	148
thyroid function tests	32
vaccines	24

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	53
Female	64

**Ethnicity**
Non-Hispanic White	91
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	48
From 75 to 84	32
85 and over	17
Less than 65	20

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2020

Hypertension	68
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	46
Depression	37
Chronic Kidney Disease	55
Asthma	0
Osteoperosis	11
Atrial Fibrilation	26
Heart Failure	33
Chronic Obstructive Pulmonary Disease	13
Diabetes	44
Dementia	19
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2021 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	258
diabetes management	67
doctor visit	278
lab tests	629
preventive care	156
thyroid function tests	34
vaccines	28

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	52
Female	65

**Ethnicity**
Non-Hispanic White	92
Black	0
Hispanic	0
Asian	12
Other	0
Native American	0

**Age**
From 65 to 74	47
From 75 to 84	33
85 and over	22
Less than 65	15

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2021

Hypertension	60
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	44
Depression	33
Chronic Kidney Disease	56
Asthma	10
Osteoperosis	12
Atrial Fibrilation	22
Heart Failure	31
Chronic Obstructive Pulmonary Disease	10
Diabetes	38
Dementia	22
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL during 2022 were lab tests, blood draw, preventive care and diabetes management.

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

blood draw	193
diabetes management	51
doctor visit	239
lab tests	454
preventive care	89
thyroid function tests	31

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	46
Female	61

**Ethnicity**
Non-Hispanic White	81
Black	0
Hispanic	0
Asian	11
Other	0
Native American	0

**Age**
From 65 to 74	47
From 75 to 84	30
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD in 2022

Hypertension	69
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	36
Depression	28
Chronic Kidney Disease	44
Asthma	19
Osteoperosis	21
Atrial Fibrilation	21
Heart Failure	25
Chronic Obstructive Pulmonary Disease	15
Diabetes	36
Dementia	12
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Brian M. Oleary, MD for Medicare patients.

The highest averages for the top procedures that Dr. Brian M. Oleary, MD treated as an internist in Aurora, IL were lab tests, rehabilitation, hospital care and inpatient care.

blood draw	280
diabetes management	97
diagnostic evaluation	25
doctor visit	482
hospital care	415
inpatient care	415
lab tests	483
manual therapy	142
preventive care	171
rehabilitation	463
thyroid function tests	30
vaccines	45

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Brian M. Oleary, MD.

**Gender**
Male	62
Female	80

**Ethnicity**
Black / African American	3
Asian / Pacific Islander	2
Non-Hispanic White	115
Hispanic	1
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	43
85 and over	19
Less than 65	18
65 to 74	57

Average of Total of Conditions of Medicare patients treated by Dr. Brian M. Oleary, MD From 2012 - 2022

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

Hypertension	65
High Cholesterol	55
Stroke	1
Ischemic Heart Disease	37
Depression	31
Chronic Kidney Disease	43
Asthma	10
Osteoporosis	9
Heart Failure	28
Chronic Obstructive Pulmonary Disease	15
Diabetes	42
Atrial Fibrillation	19
Cancer	9
Dementia	15

Education & Training

Dr. Brian M. Oleary, MD graduated from Northwestern University, Feinberg School of Medicine in 1985. He completed residency at Northwestern Memorial Hospital. He is certified by the Board Certification: Internal Medicine and has a state license in Illinois.

Medical School: Northwestern University, Feinberg School of Medicine (1985)

Residency: Northwestern Memorial Hospital

Board Certification: Board Certification: Internal Medicine

Licensed In: Illinois

Affiliations & Hospitals

Dr. Brian M. Oleary, MD is associated with these hospitals and organizations:

Endeavor Health

Duly Health and Care

DUPAGE MEDICAL GROUP LTD

Ratings & Reviews

Dr. Brian M. Oleary, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 426 ratings. We collect ratings and reviews of Dr. Brian M. Oleary, MD from all over the web to help you find the right in Aurora, IL.

Overall Rating

(426 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2025-05-18

Patient verified via Press Ganey

Dr Brian O'Leary is the best doctor. I won't go to anyone else. He is kind and caring. The doctors that he has referred me to are just as wonderful as he is. I have never been unhappy with my doctor visits, Dr O'Leary has been my doctor for about 25 - 30 years. He is very encouraging. I truly love him as my doctor.

Overall Rating: 5.0 2026-02-23

Patient verified via Press Ganey

I especially appreciate that when Dr. O'Leary prescribes treatment, he closely monitors my progress, considers my concerns, and we work out any needed adjustments together. He and his staff are the best.

Overall Rating: 5.0 2024-10-29

Patient verified via Press Ganey

Dr O'Leary is an excellent doctor. He really listens to my concerns and responds with helpful information. I trust him always. He takes great care of me and I am so grateful!

Overall Rating: 5.0 2025-05-19

Patient verified via Press Ganey

Dr. O'Leary is very experienced and passionate about his job and he actually enjoys seeing me. A superb doctor.

Overall Rating: 5.0 2025-11-19

Patient verified via Press Ganey

We love our Doctor we give them all 100%It is the Duly thing that drives us nuts you on Hold FOR EVER!!!!!!

Overall Rating: 5.0 2025-05-22

Patient verified via Press Ganey

I feel very lucky having Dr O'Leary as my internist. He always shows concern for my well being.

Overall Rating: 5.0 2025-08-21

Patient verified via Press Ganey

Dr. O'Leary is the best! He's a great problem, solver and willing to explore options.

Overall Rating: 5.0 2026-01-08

Patient verified via Press Ganey

Always enjoy talking to Dr O'Leary, who is very informed, helpful & compassionate

Overall Rating: 5.0 2024-11-04

Patient verified via Press Ganey

Love Dr. O'Leary, he is the best. I'm lucky to have him as my physician.

Overall Rating: 5.0 2024-10-25

Patient verified via Press Ganey

Dr. O'Leary is absolutely excellent. Awesome explanations of everything.

To see all 426 reviews for Dr. Brian M. Oleary, MD, view their full profile.

General Payments

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

**Payments by Company**
Novo Nordisk Inc	$318 Ozempic $113	RYBELSUS $88	Saxenda $34	Tresiba $33	Wegovy $15	Other $35
Medtronic Vascular, Inc.	$253 Aortic Stent Grafts $253
Boehringer Ingelheim Pharmaceuticals, Inc.	$240 JARDIANCE $145	STIOLTO RESPIMAT $63	SPIRIVA RESPIMAT $31
Pfizer Inc.	$170 ELIQUIS $88	NURTEC ODT $57	PREVNAR 13 $25
AstraZeneca Pharmaceuticals LP	$167 FARXIGA $120	BYDUREON $29	BRILINTA $18
Other	$799 ENTRESTO $114	JARDIANCE $84	Kerendia $61	NUCALA $58	PHASIX $49	Other $433

**Types of Payments**
Food and Beverage	$1,674
Education	$272

Biography

Dr. Brian O'Leary speaks French. His areas of expertise consist of diabetes, heart problems, and hypertension (high blood pressure). He is professionally affiliated with Edward Hospital, Advocate Good Samaritan Hospital, and Duly Health and Care. Dr. O'Leary attended Northwestern University, Feinberg School of Medicine and subsequently trained at Northwestern Memorial Hospital for residency. He has a 5.0 out of 5 star average patient rating. Awards and/or distinctions Dr. O'Leary has received include Castle Connolly; Top Doctor; and Chicago Magazine. According to Doctor.com, new patients are welcome to contact his office in Naperville, IL.