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Dr. John D. Ayers, MD

Accepting New Patients

(John D. Ayers, MD)

(100 Ratings)

Specializes in: General Practice, Medical Oncology and Hematology (Blood Disorders)

University of Illinois at Chicago College of Medicine (1995)

Professional interests include: breast cancer, melanoma

4405 Weaver Parkway
Warrenville, IL 60555

(630) 352-5450

Dr. John D. Ayers, MD is a general practitioner in Warrenville, IL specializing in general practice, medical oncology and hematology (blood disorders). He graduated from University of Illinois at Chicago College of Medicine in 1995 and has 31 years of experience. Dr. John D. Ayers, MD is affiliated with Northwestern Medicine and Northwestern Medical Group.

Office Locations

4405 Weaver Parkway
Warrenville, IL 60555

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Noteworthy Medicare Patient Procedures Performed by Dr. John D. Ayers, MD in 2023

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

Top 25%

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2012, Dr. John D. Ayers, 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 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. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2012 were hospital care, inpatient care and hormone therapy.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	1079
hormone therapy	90
hospital care	331
inpatient care	331

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2013 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	920
hospital care	136
inpatient care	136

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	142
Female	313

**Ethnicity**
Non-Hispanic White	407
Black	0
Hispanic	17
Asian	12
Other	0
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	162
85 and over	56
Less than 65	33

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2013

Hypertension	64
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	23
Depression	19
Chronic Kidney Disease	22
Asthma	7
Osteoperosis	14
Atrial Fibrilation	13
Heart Failure	18
Chronic Obstructive Pulmonary Disease	13
Diabetes	26
Dementia	6
Cancer	60

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2014 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	789
hospital care	273
inpatient care	273

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	139
Female	313

**Ethnicity**
Non-Hispanic White	405
Black	0
Hispanic	18
Asian	14
Other	0
Native American	0

**Age**
From 65 to 74	196
From 75 to 84	165
85 and over	57
Less than 65	34

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2014

Hypertension	69
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	27
Depression	23
Chronic Kidney Disease	27
Asthma	7
Osteoperosis	15
Atrial Fibrilation	15
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	29
Dementia	7
Cancer	57

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2015 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	756
hospital care	245
inpatient care	245

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	216
Female	628

**Ethnicity**
Non-Hispanic White	762
Black	0
Hispanic	36
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	378
From 75 to 84	304
85 and over	96
Less than 65	66

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2015

Hypertension	66
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	27
Depression	24
Chronic Kidney Disease	24
Asthma	10
Osteoperosis	18
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	11
Diabetes	26
Dementia	7
Cancer	59

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2016 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	710
hospital care	207
inpatient care	207

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	95
Female	322

**Ethnicity**
Non-Hispanic White	374
Black	0
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	191
From 75 to 84	147
85 and over	47
Less than 65	32

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2016

Hypertension	66
High Cholesterol	58
Stroke	7
Ischemic Heart Disease	25
Depression	22
Chronic Kidney Disease	27
Asthma	16
Osteoperosis	18
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	7
Cancer	59

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2017 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	754
hospital care	233
inpatient care	233

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	83
Female	345

**Ethnicity**
Non-Hispanic White	380
Black	12
Hispanic	22
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	187
From 75 to 84	153
85 and over	58
Less than 65	30

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2017

Hypertension	66
High Cholesterol	45
Stroke	6
Ischemic Heart Disease	23
Depression	24
Chronic Kidney Disease	29
Asthma	7
Osteoperosis	17
Atrial Fibrilation	16
Heart Failure	19
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Dementia	10
Cancer	61

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	686
hospital care	171
inpatient care	171

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	89
Female	366

**Ethnicity**
Non-Hispanic White	411
Black	0
Hispanic	17
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	183
From 75 to 84	169
85 and over	75
Less than 65	28

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2018

Hypertension	67
High Cholesterol	58
Stroke	5
Ischemic Heart Disease	22
Depression	19
Chronic Kidney Disease	27
Asthma	8
Osteoperosis	17
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	10
Diabetes	26
Dementia	9
Cancer	62

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2019 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	747
hospital care	204
inpatient care	204

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	97
Female	374

**Ethnicity**
Non-Hispanic White	420
Black	0
Hispanic	21
Asian	15
Other	0
Native American	0

**Age**
From 65 to 74	206
From 75 to 84	177
85 and over	60
Less than 65	28

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2019

Hypertension	64
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	25
Depression	27
Chronic Kidney Disease	27
Asthma	7
Osteoperosis	16
Atrial Fibrilation	13
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	25
Dementia	8
Cancer	64

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2020 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	663
hospital care	147
inpatient care	147
preventive care	11
vaccines	11

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	86
Female	378

**Ethnicity**
Non-Hispanic White	410
Black	0
Hispanic	22
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	203
From 75 to 84	178
85 and over	55
Less than 65	28

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2020

Hypertension	64
High Cholesterol	58
Stroke	6
Ischemic Heart Disease	22
Depression	25
Chronic Kidney Disease	27
Asthma	5
Osteoperosis	15
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	11
Diabetes	28
Dementia	9
Cancer	60

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2021 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	691
hospital care	177
inpatient care	177

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	102
Female	348

**Ethnicity**
Non-Hispanic White	407
Black	0
Hispanic	15
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	192
From 75 to 84	177
85 and over	62
Less than 65	19

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2021

Hypertension	64
High Cholesterol	64
Stroke	6
Ischemic Heart Disease	23
Depression	24
Chronic Kidney Disease	28
Asthma	6
Osteoperosis	16
Atrial Fibrilation	14
Heart Failure	22
Chronic Obstructive Pulmonary Disease	12
Diabetes	24
Dementia	8
Cancer	60

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL during 2022 were hospital care and inpatient care.

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

doctor visit	743
hospital care	194
inpatient care	194

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	114
Female	344

**Ethnicity**
Non-Hispanic White	402
Black	11
Hispanic	19
Asian	15
Other	11
Native American	0

**Age**
From 65 to 74	212
From 75 to 84	164
85 and over	61
Less than 65	21

Conditions of Medicare patients treated by Dr. John D. Ayers, MD in 2022

Hypertension	71
High Cholesterol	72
Stroke	9
Ischemic Heart Disease	21
Depression	22
Chronic Kidney Disease	19
Asthma	8
Osteoperosis	24
Atrial Fibrilation	16
Heart Failure	17
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	5
Cancer	63

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John D. Ayers, MD for Medicare patients.

The highest averages for the top procedures that Dr. John D. Ayers, MD treated as a general practitioner in Warrenville, IL were hospital care, inpatient care, hormone therapy and preventive care.

doctor visit	776
hormone therapy	90
hospital care	210
inpatient care	210
preventive care	11
vaccines	11

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John D. Ayers, MD.

**Gender**
Male	105
Female	339

**Ethnicity**
Black / African American	2
Asian / Pacific Islander	11
Non-Hispanic White	398
Native American / Alaskan Native	0
Hispanic	18
Other	1

**Age**
75 to 84	163
85 and over	57
Less than 65	29
65 to 74	195

Average of Total of Conditions of Medicare patients treated by Dr. John D. Ayers, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. John D. Ayers, MD treated were hypertension, cancer, high cholesterol and diabetes.

Hypertension	60
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	21
Depression	20
Chronic Kidney Disease	23
Asthma	7
Osteoporosis	15
Heart Failure	16
Chronic Obstructive Pulmonary Disease	11
Diabetes	24
Atrial Fibrillation	12
Dementia	6
Cancer	55

Education & Training

Dr. John D. Ayers, MD graduated from University of Illinois at Chicago College of Medicine in 1995. He completed residency at Boston University Medical Center. He is certified by the American Board of Internal Medicine - Hematology (Certified) and has a state license in Illinois.

Medical School: University of Illinois at Chicago College of Medicine (1995)

Residency: Boston University Medical Center (1997)

Board Certification: American Board of Internal Medicine - Hematology (Certified)

Licensed In: Illinois

Affiliations & Hospitals

Dr. John D. Ayers, MD is associated with these hospitals and organizations:

Northwestern Medicine

Northwestern Medical Group

Ratings & Reviews

Dr. John D. Ayers, MD has an exceptional overall rating with an average of 4.98 out of 5 stars based on 100 ratings. We collect ratings and reviews of Dr. John D. Ayers, MD from all over the web to help you find the right in Warrenville, IL.

4.98

Overall Rating

(100 Ratings)

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General Payments

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

**Payments by Company**
SANOFI-AVENTIS U.S. LLC	$168 ELITEK $168
Astellas Pharma US Inc	$137 XTANDI $58	$79
GE Healthcare	$135 $135
Genentech USA, Inc.	$77 Avastin $34	Gazyva $25	Kadcyla $19
EMD Serono, Inc.	$68 Gonal-f $68
Other	$362 Vectibix $34	ZYKADIA $30	SUTENT $28	FASLODEX $28	SYLATRON $25	Other $218

**Types of Payments**
Food and Beverage	$839
Education	$108

Research Payments

Dr. John D. Ayers, MD has received 22 research payments totaling $107,247.

Biography

Dr. John Ayers sees patients in Warrenville, IL. His medical specialties are general practice, medical oncology, and hematology (blood disorders). Dr. Ayers is rated highly by his patients. His clinical interests include breast cancer and melanoma. He is professionally affiliated with Northwestern Medicine Central DuPage Hospital and Northwestern Medical Group (NMG). According to Yext, he is currently accepting new patients at his office in Warrenville, IL. Dr. Ayers studied medicine at the University of Illinois College of Medicine at Chicago. He completed his residency training at Boston Medical Center.