William C. Bayer, MD

William C. Bayer, MD

4.9 
1035 ratings  Read Reviews
Northwestern Medicine logoNorthwestern Medicine Regional Medical Group

Primary Specialty

Endocrinology

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Education

Medical Education:
MD, Loyola University Stritch School of Medicine - 1986
Residency:
Loyola University Medical Center - 1989
Fellowships:
Loyola University Medical Center - 1991

Board Certifications

  • American Board of Internal Medicine - Endocrinology, Diabetes & Metabolism (Certified)
  • American Board of Internal Medicine - Internal Medicine (Certified)

Practice Groups and Affiliations

Medical Group:
Northwestern Medicine Regional Medical Group
Alignment Category:
Northwestern Medicine Physician Network
On Medical Staff At:
Central DuPage Hospital

Ratings and Reviews

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Overall Rating

4.9
4.9 

1035 Ratings

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Reviews from Patients

81 Reviews

Reviews from Patients

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81 Reviews

August 28, 2023

5.0

He is so friendly and highly knowledgeable person

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August 25, 2023

5.0

Dr. Bayer is always encouraging - a coach, not a "scold." He is helpful and monitors my situation well.

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August 23, 2023

5.0

Great doc and very concerned.

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August 22, 2023

5.0

Dr Bayer was excellent - very intelligent and spent all the time we needed. I highly recommend him.

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August 22, 2023

5.0

Easiest doctor to work with

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August 22, 2023

5.0

Thorough, efficient, upbeat, positive and receptive to questions.

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August 22, 2023

5.0

Dr. Bayer is Professional, very knowledgeable, thoughtful and kind. He is an outstanding doctor. The very best.

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August 16, 2023

5.0

He explains well about my care and follow ups. Answers all my questions and explains thoroughly. Great doctor.

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August 14, 2023

5.0

Very kind doctor and knowledgeable

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August 12, 2023

5.0

He really listened

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August 09, 2023

5.0

Exceptional Guaita if medical care and understanding

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August 08, 2023

5.0

He knows his to deal with anxious patients and offers reassuring advice.

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August 07, 2023

5.0

Best Doctor I ever had.

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August 07, 2023

5.0

Dr. Bayer is very good at his job. He listens to and addresses my concerns.

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August 05, 2023

5.0

Very kind doctor. Felt like he really wants to help me and figure out what’s is going on with my health.

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August 04, 2023

5.0

Very thorough and checks in everything with me.

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August 01, 2023

5.0

The doctor has a good personality, answered questions and genuinely seemed to care.

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August 01, 2023

5.0

Takes time. Asks questions and addressed my film medical history with the visit

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July 26, 2023

5.0

I really like the doctor because he is on time and very thorough.

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July 25, 2023

5.0

Because for the same reason on last question.

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July 25, 2023

5.0

Dr. Bayer truly cares about his patients.

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July 24, 2023

5.0

Dr. Bayer very knowledgeable and professional, and always takes the time to listen

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July 24, 2023

5.0

Very knowledgeable

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July 23, 2023

5.0

He is the kind of physician I would want someone to recommend to me if I were looking.

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July 23, 2023

5.0

Easy to understand his medical instructions and reasoning

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July 20, 2023

4.0

Very thorough and listened to my questions giving me options for treatment.

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July 19, 2023

5.0

Very good doctor and answers all my questions.

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July 11, 2023

5.0

He is very aware and orders the correct tests.

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July 07, 2023

5.0

One of the best around!

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July 06, 2023

5.0

He is a doctor that cares about his patients and reaches out to them

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July 06, 2023

5.0

Always takes time to answer questions

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July 05, 2023

5.0

Doctor takes his time in explaining all my concerns

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July 05, 2023

5.0

He is a wonderful Dr. who really cares about his patients. He takes time to listen and discuss your issues and symptoms with you before discussing a plan of action. I see him for my thyroid.

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July 04, 2023

5.0

listened and recommended appropriate resolutions.

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July 04, 2023

5.0

Dr.Bayer has taken care of my diabetes for years and I am very comfortable with that care he has given me.

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July 03, 2023

5.0

HE IS A OUTSTANDING PERSON !

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June 29, 2023

5.0

Listens and then gives feedback.

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June 29, 2023

5.0

Please see my previous response.

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June 26, 2023

5.0

Dr. Bayer is amazing. I haven’t felt this good in years.

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June 23, 2023

5.0

I love my doctor

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June 21, 2023

5.0

Right to the point. Very honest!

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June 20, 2023

5.0

If I could give him 100 I would. Takes time to listen and explain. Best Dr you have on your staff! One in a million!

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June 17, 2023

5.0

He is always kind, listening, ultra professional and effective. Best of the best!

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June 14, 2023

5.0

Attentive. Detailed and kind

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June 09, 2023

5.0

He is a great Doctor.

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June 09, 2023

5.0

Smart, shows genuine concern, listens and explains care, meds. Etc.

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June 09, 2023

5.0

Very thorough. Great bedside manner. Excellent doctor!

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June 08, 2023

5.0

Listens and provides feedback to questions, test results and meds. Follows up.

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May 31, 2023

5.0

Quality care!

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May 30, 2023

5.0

Great doctor that listens to you and doesn't push unnecessary medications.

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May 27, 2023

5.0

Dr. Bayer is excellent in so many ways. Very detailed in his approach to working with patients and understanding their individual requirements to achieve the best health results.

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May 26, 2023

5.0

Knowledgeable and answered all of my questions

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May 24, 2023

5.0

He’s confident and knows his stuff.

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May 24, 2023

5.0

Professional and courteous

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May 23, 2023

5.0

He has been my endocrinologist for many years. He’s very intelligent, thorough and leaves no stone unturned.

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May 23, 2023

5.0

He's been a doctor of mine for many, many years and always cares to talk about the issues.

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May 22, 2023

5.0

He’s knowledgeable and friendly and keeps me informed.

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May 19, 2023

5.0

He listens and provides realistic suggestions.

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May 19, 2023

5.0

He explained my options clearly.

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May 17, 2023

5.0

Dr Bayer. Intelligent, knowledgeable, personable, easy to talk to.

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May 13, 2023

5.0

For the same reasons given above.

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May 12, 2023

5.0

He’s great.

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May 09, 2023

5.0

Adequate time for questions

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May 09, 2023

5.0

He is a good Dr., good at everything, he pays a lot of attention, very kind

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May 08, 2023

5.0

He is so thorough. He’s always caring about how you are. If something is wrong, Dr. Bayer WILL find it! He’s fabulous!

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April 28, 2023

5.0

Relates to patients well.

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April 26, 2023

5.0

Dr. Bayer stays well focused on the issue at hand but without losing the broad perspective of patient's overall health.

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April 25, 2023

5.0

Friendly. Listened. Open to any questions.

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April 25, 2023

5.0

Dr. Bayer is compassionate and caring. He always checks and covers all bases. He helped me make a decision whether or not to remove all of my thyroid.

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April 24, 2023

5.0

He takes the time to explain things.

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April 24, 2023

5.0

He listens and responds.

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April 21, 2023

5.0

Seems to care and knows his specialty

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April 19, 2023

5.0

Very professional and caring

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April 19, 2023

5.0

Very professional !

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April 19, 2023

5.0

Dr. Bayer is an excellent doctor. He is knowledgeable, answers all my questions, and is very thorough.

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April 19, 2023

5.0

Very knowledgeable and took time to listen and answer questions. Very nice encounter!

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April 17, 2023

5.0

He is one of the best MD’s ever and I have been in the nursing for 38 years….

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April 17, 2023

5.0

I can't imagine a better endocrinologist. Dr. Bayer is so knowledgeable yet communicates so well. Great listener and seems like a great overall person. He grasps the problem quickly and provides a trustworthy and frictionless solution .

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April 17, 2023

5.0

Dr Bayer did a thorough job checking my file, follow up done extremely well, & he is very personable.

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April 16, 2023

5.0

He is smart, wonderful listener and very wise

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April 15, 2023

5.0

He stays on top of all my health issues and answers my questions

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Disclosures

Industry Relationships

Consulting / Related Activities

Faculty member engaged in activities such as speaking, advising, consulting, or providing educational programs for the following companies or other entities

  • AbbVie, Inc.
  • IQVIA
  • Meetings and Events International
  • Novo Nordisk A/S

External Professional Relationships

Pharmaceutical, device, and biotechnology companies frequently collaborate with basic scientists and physicians within an academic medical center to help advance science and improve patient care. These relationships are important in achieving scientific breakthroughs and in establishing the effectiveness and safety of promising new therapies. In order to assure objectivity in clinical research and patient care, the Northwestern University Feinberg School of Medicine (Feinberg), Northwestern Memorial HealthCare, Children's Hospital of Chicago Medical Center, and the Shirley Ryan AbilityLab have adopted integrity policies that require research and clinical faculty (in full-time, part-time, and unpaid/voluntary categories) to report compensated and uncompensated external industry relationships. Patients are encouraged to discuss these disclosures with their physician as well as to inquire as to how these relationships are overseen by Feinberg. To learn more about our Disclosure and Professional Integrity Policy, and the conflict of interest policies of our joint affiliate survey partners, please go to our Office for Regulatory Affairs Policies page.

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