Home > IL Providers > Endocrinologists

Dr. William C. Bayer, MD, MD-Gynecologic Oncology

Accepting New Patients

(William C. Bayer, MD)

(107 Ratings)

Specializes in: Endocrinology Diabetes & Metabolism, General Practice and Internal Medicine (Adult Medicine)

Loyola University Stritch School of Medicine (1986)

233 S Gary Avenue
Bloomingdale, IL 60108

(630) 208-6775

Dr. William C. Bayer, MD, MD-Gynecologic Oncology is an endocrinologist in Bloomingdale, IL specializing in endocrinology diabetes & metabolism, general practice and internal medicine (adult medicine). He graduated from Loyola University Stritch School of Medicine in 1986 and has 39 years of experience. Dr. William C. Bayer, MD, MD-Gynecologic Oncology is affiliated with Northwestern Medicine, Northwestern Medicine Regional Medical Group and CENTRAL DUPAGE PHYSICIAN GROUP.

Office Locations

Address:

233 S Gary Avenue
Bloomingdale, IL 60108

doctor visit	807
hospital care	161
inpatient care	161
lab tests	20
neck imaging	118
preventive care	43
ultrasound (sonogram)	118
vaccines	23

**Gender**
Male	190
Female	404

**Ethnicity**
Non-Hispanic White	535
Black	0
Hispanic	24
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	272
From 75 to 84	192
85 and over	78
Less than 65	52

Hypertension	72
High Cholesterol	67
Stroke	4
Ischemic Heart Disease	29
Depression	17
Chronic Kidney Disease	21
Asthma	8
Osteoperosis	15
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	12
Diabetes	48
Dementia	9
Cancer	11

diabetes management	20
doctor visit	738
hospital care	104
inpatient care	104
lab tests	19
neck imaging	39
preventive care	29
ultrasound (sonogram)	39
vaccines	10

**Gender**
Male	173
Female	369

**Ethnicity**
Non-Hispanic White	480
Black	13
Hispanic	24
Asian	11
Other	14
Native American	0

**Age**
From 65 to 74	261
From 75 to 84	164
85 and over	69
Less than 65	48

Hypertension	72
High Cholesterol	69
Stroke	5
Ischemic Heart Disease	28
Depression	19
Chronic Kidney Disease	19
Asthma	7
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	48
Dementia	9
Cancer	10

diabetes management	135
doctor visit	728
hospital care	128
inpatient care	128
lab tests	134
preventive care	131

**Gender**
Male	330
Female	690

**Ethnicity**
Non-Hispanic White	894
Black	22
Hispanic	36
Asian	38
Other	30
Native American	0

**Age**
From 65 to 74	506
From 75 to 84	302
85 and over	88
Less than 65	124

diabetes management	163
doctor visit	755
hospital care	136
inpatient care	136
lab tests	162
preventive care	172
vaccines	10

**Gender**
Male	175
Female	378

**Ethnicity**
Non-Hispanic White	496
Black	13
Hispanic	20
Asian	13
Other	11
Native American	0

**Age**
From 65 to 74	287
From 75 to 84	158
85 and over	51
Less than 65	57

Hypertension	70
High Cholesterol	67
Stroke	4
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	48
Asthma	13
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	50
Dementia	7
Cancer	11

diabetes management	176
doctor visit	777
hospital care	121
inpatient care	121
lab tests	175
preventive care	172

**Gender**
Male	190
Female	374

**Ethnicity**
Non-Hispanic White	504
Black	11
Hispanic	19
Asian	18
Other	12
Native American	0

**Age**
From 65 to 74	289
From 75 to 84	165
85 and over	53
Less than 65	57

Hypertension	72
High Cholesterol	66
Stroke	5
Ischemic Heart Disease	29
Depression	25
Chronic Kidney Disease	46
Asthma	9
Osteoperosis	14
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	14
Diabetes	50
Dementia	7
Cancer	13

diabetes management	161
doctor visit	760
hospital care	100
inpatient care	100
lab tests	160
preventive care	157

**Gender**
Male	201
Female	387

**Ethnicity**
Non-Hispanic White	514
Black	0
Hispanic	26
Asian	21
Other	0
Native American	0

**Age**
From 65 to 74	299
From 75 to 84	174
85 and over	54
Less than 65	61

diabetes management	181
doctor visit	829
hospital care	49
inpatient care	49
lab tests	180
preventive care	177

**Gender**
Male	188
Female	391

**Ethnicity**
Non-Hispanic White	515
Black	12
Hispanic	19
Asian	18
Other	15
Native American	0

**Age**
From 65 to 74	283
From 75 to 84	193
85 and over	59
Less than 65	44

Hypertension	72
High Cholesterol	75
Stroke	3
Ischemic Heart Disease	27
Depression	24
Chronic Kidney Disease	44
Asthma	8
Osteoperosis	20
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	44
Dementia	7
Cancer	12

diabetes management	113
doctor visit	643
hospital care	56
inpatient care	56
lab tests	112
preventive care	109

**Gender**
Male	208
Female	384

**Ethnicity**
Non-Hispanic White	519
Black	13
Hispanic	24
Asian	20
Other	16
Native American	0

**Age**
From 65 to 74	287
From 75 to 84	196
85 and over	61
Less than 65	48

Hypertension	72
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	27
Depression	23
Chronic Kidney Disease	48
Asthma	7
Osteoperosis	21
Atrial Fibrilation	10
Heart Failure	17
Chronic Obstructive Pulmonary Disease	9
Diabetes	47
Dementia	9
Cancer	14

blood draw	39
diabetes management	160
doctor visit	710
hospital care	73
inpatient care	73
lab tests	159
preventive care	156

**Gender**
Male	196
Female	372

**Ethnicity**
Non-Hispanic White	510
Black	11
Hispanic	17
Asian	18
Other	12
Native American	0

**Age**
From 65 to 74	259
From 75 to 84	202
85 and over	58
Less than 65	49

blood draw	172
diabetes management	167
doctor visit	782
hospital care	61
inpatient care	61
lab tests	166
preventive care	163

**Gender**
Male	225
Female	405

**Ethnicity**
Non-Hispanic White	542
Black	14
Hispanic	31
Asian	17
Other	26
Native American	0

**Age**
From 65 to 74	307
From 75 to 84	225
85 and over	57
Less than 65	41

Hypertension	73
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	25
Depression	22
Chronic Kidney Disease	32
Asthma	9
Osteoperosis	27
Atrial Fibrilation	16
Heart Failure	17
Chronic Obstructive Pulmonary Disease	11
Diabetes	48
Dementia	7
Cancer	17

Average Medicare Procedure Volume From 2013 - 2022

Volume of procedures performed by Dr. William C. Bayer, MD, MD-Gynecologic Oncology for Medicare patients.

The highest averages for the top procedures that Dr. William C. Bayer, MD, MD-Gynecologic Oncology treated as an endocrinologist in Bloomingdale, IL were diabetes management, preventive care, lab tests and blood draw.

blood draw	105
diabetes management	141
doctor visit	754
hospital care	98
inpatient care	98
lab tests	129
neck imaging	78
preventive care	134
ultrasound (sonogram)	78
vaccines	16

Average Medicare Patient Data From 2013 - 2022

Information about Medicare patients treated by Dr. William C. Bayer, MD, MD-Gynecologic Oncology.

**Gender**
Female	415
Male	207

**Ethnicity**
Black / African American	10
Asian / Pacific Islander	19
Non-Hispanic White	550
Native American / Alaskan Native	0
Hispanic	24
Other	13

**Age**
75 to 84	197
85 and over	62
Less than 65	58
65 to 74	305

Average of Total of Conditions of Medicare patients treated by Dr. William C. Bayer, MD, MD-Gynecologic Oncology From 2013 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. William C. Bayer, MD, MD-Gynecologic Oncology treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	71
High Cholesterol	70
Stroke	4
Ischemic Heart Disease	26
Depression	21
Chronic Kidney Disease	38
Asthma	9
Osteoporosis	17
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	48
Atrial Fibrillation	12
Dementia	7
Cancer	12

Education & Training

Dr. William C. Bayer, MD, MD-Gynecologic Oncology graduated from Loyola University Stritch School of Medicine in 1986. He completed residency at Loyola University Medical Center. He is certified by the American Board of Internal Medicine - Internal Medicine (Certified) and has a state license in Illinois.

Medical School: Loyola University Stritch School of Medicine (1986)

Residency: Loyola University Medical Center (1989)

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

Licensed In: Illinois

Affiliations & Hospitals

Dr. William C. Bayer, MD, MD-Gynecologic Oncology is associated with these hospitals and organizations:

Northwestern Medicine

Northwestern Medicine Regional Medical Group

CENTRAL DUPAGE PHYSICIAN GROUP

Ratings & Reviews

Dr. William C. Bayer, MD, MD-Gynecologic Oncology has an exceptional overall rating with an average of 4.88 out of 5 stars based on 107 ratings. We collect ratings and reviews of Dr. William C. Bayer, MD, MD-Gynecologic Oncology from all over the web to help you find the right in Bloomingdale, IL.

4.88

Overall Rating

(107 Ratings)

Leave a Review

General Payments

These charts describe general payments received by Dr. William C. Bayer, MD, MD-Gynecologic Oncology. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Novo Nordisk Inc	$117,138 Victoza $41,577	RYBELSUS $23,806	Tresiba $17,141	Ozempic $16,883	Xultophy 100/3.6 $7,939	Other $9,791
AbbVie, Inc.	$55,178 Synthroid $31,723	Androgel $16,543	Lupron $1,356	Creon $10	$5,546
Boehringer Ingelheim Pharmaceuticals, Inc.	$50,136 JARDIANCE $31,305	GLYXAMBI $11,410	TRADJENTA $4,961	JENTADUETO $179	COMBIVENT RESPIMAT $73	Other $2,208
SANOFI-AVENTIS U.S. LLC	$34,978 TOUJEO $25,490	LANTUS $4,906	APIDRA $1,855	SOLIQUA $270	AFREZZA $84	Other $2,374
Lilly USA, LLC	$23,176 JARDIANCE $18,072	GLYXAMBI $2,313	TRADJENTA $1,929	MOUNJARO $380	TRULICITY $211	Other $271
Other	$34,843 INVOKANA $14,256	BYDUREON $7,579	FARXIGA $3,296	Synthroid $3,004	ATELVIA $1,009	Other $5,699

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$263,361
Food and Beverage	$26,953
Travel and Lodging	$13,015
Consulting Fee	$11,852
Education	$268

Ownership and Interest Payments

This table describes ownership payments received by Dr. William C. Bayer, MD, MD-Gynecologic Oncology.

Company	Year	Amount	Source of Ownership	Terms of Ownership
CCPA Purchasing Partners, L.P.	2016	$15.78	Physician Covered Recipient	Limited Partnership Interest
CCPA Purchasing Partners, L.P.	2014	$15.78	Physician Covered Recipient	Limited Partnership Interest
CCPA Purchasing Partners, L.P.	2015	$15.78	Physician Covered Recipient	Limited Partnership Interest

Showing 1 to 3 of 3 entries

Biography

Dr. William Bayer is a specialist in general practice and endocrinology. He is rated highly by his patients. Dr. Bayer's professional affiliations include Northwestern Medicine Central DuPage Hospital and Northwestern Medicine Regional Medical Group. His practice in Bloomingdale, IL is open to new patients as reported by Yext. Dr. Bayer attended Loyola University Chicago, Stritch School of Medicine and subsequently trained at a hospital affiliated with Loyola University for residency.