Dr. William Bayer, MD

Endocrinology, Diabetes & Metabolism*•Male•Age 64

Endocrinology, Diabetes & Metabolism*

Dr. William Bayer, MD is a diabetes & metabolism endocrinologist in Bloomingdale, IL and has over 35 years of experience in the medical field. Dr. Bayer has extensive experience in Diabetes & Glucose Monitoring, Metabolic Disorders, and Thyroid Disorders. He graduated from Loyola University Chicago Stritch School of Medicine in 1986. He is affiliated with medical facilities Edward Hospital-Main Campus and Northwestern Medicine Central Dupage Hospital. He is accepting new patients and telehealth appointments.

Dr. William Bayer, MD

Practice

233 S Gary Ave Bloomingdale, IL 60108
Telehealth availableTelehealth services available
(630) 208-6775
Telehealth availableTelehealth services available
|

Accepting new patients

(630) 208-6775

Hospital Highlight

Dr. Bayer is affiliated with Northwestern Medicine Central Dupage Hospital Winfield, a highly rated hospital.

At a Glance

  • Areas of Expertise
    Dr. Bayer specializes in the areas of Diabetes, Metabolism & Endocrinology & Internal Medicine. • See board certifications
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    Patient Safety Excellence Award™ • See hospitals
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. • See hospitals
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Dr. Bayer's Reviews

Likelihood to recommend Dr. Bayer

3.6
34 ratings, 17 with a written review
5 star
62%
62%
4 star
0%
0%
3 star
3%
3%
2 star
3%
3%
1 star
32%
32%

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Thorough, discusses all options with you
Dr. Bayer will discuss all options with you and you will be the one to decide. He is open to looking at all aspects of your symptoms and ordering the appropriate tests. He is friendly and knowledgeable.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Oct 01, 2023
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Great Doc
Really explained everything clearly about my thyroid and what steps need to be taken next and always asked if I had any questions.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
What could be improved
No results
Helpful
May 06, 2022
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Horrible bedside manner. Was rude, rushed, constantly cut me off when I tried discussing health concerns. He seemed irritated whenever I asked questions. Focused his attention on his computer to finish the note, versus having eye-contact and a conversation. Instead of explaining the treatment plan directly to me (medications, labs, etc) he read off his thoughts as he was typing it into the note. As someone else said, he sounded very robotic. Did not discuss exercise or nutrition, despite me trying to address that. I plan to change doctors and even clinic if necessary.
What went well
  • Appointment scheduling
  • Staff friendliness
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Appointment was rushed
3 others found this helpful
Helpful
Mike – Dec 30, 2020
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Absolutely the best. 20 plus year patient. Dr Bauer and Staff are highly responsive and very comprehensive health care.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Renee – Dec 15, 2020
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Dr Bayer is professional and thorough. He asks the right questions and orders all pertinent tests to protect your health. He is always pleasant which is a great complement to being a good doctor.
What went well
No results
What could be improved
No results
Helpful
Jan 13, 2020
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Dr. Bayer is an excellent and outstanding Endocrinologist. I have been seeing him for over 20 years. He's very thorough and explains things to you. He takes his time and listens to you. He's very friendly and he has a great sense of humor. He's the best Endocrinologist around and I would recommend him to anyone!!! ?
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Lisa Robertson in IL – Apr 02, 2019
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Dr. Bayer has always listened to my symptoms, not just bloodwork results. When the tests he ran came back normal, but my symtpoms said otherwise, he ran more tests until he figured out what was wrong. When my prognosis wasn't great, he personally called me to go over the results and then followed up with a second phone call a week later to see if I had any new questions since our first conversation.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 others found this helpful
Helpful
Bloomingdale – Jan 23, 2018
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Dr. Bayer is a Diabetic Endocrinologist that I have complete trust in has really turned my A1C Goal/Goals to the Positive. He is very knowledgeable in his field and he always spends appropriate time w/patient/patients. I will be 62 in December and have been battling Diabetes since 1999/2000. He has also been a big influence on how I feel about my condition-always Positive. He has my Thanks! Bryan Compton
What went well
  • Office environment
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 others found this helpful
Helpful
Bryan Compton in St. Charles IL. – Apr 04, 2017
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Do not take the bad reviews seriously! Dr. Bayeris amazing & caring! So, if you need a really good doctor that cares about your health & does not set a timer when you walk in, he is your answer to getting your health back on track! I came to him when there was no one else. He cared & I am now on my way to not only answers but resolutions. He has a good heart & is a briliant doctor! If you are serious about working on your health & learning how to be healthier but need a coach; he is for you!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 others found this helpful
Helpful
marge in ELK GROVE VILLAGE – Mar 29, 2017
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Dr Bayer is a no-nonsense doctor that is very knowledgable and thoruough. I have gone to him for many years before a car accident and am now able to see him again. I could not find his phone number so I looked it up. As I read the reveiws that were positive, I could relate. As I read the negative reviews I wondered what could have gone wrong. I made my appointment a little concerned. Well, I can only say that Dr. Bayer is still the caring wonderful doctor that I remember.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 others found this helpful
Helpful
Hoffman Estates, IL – Mar 29, 2017
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He needs to retire. He's clearly mad at everything, he was 30 minutes late to an 8:00 am meeting and told me out of the gate he already didn't know what to do. He took no time to listen and understand. he's terrible, go somewhere else
What went well
  • Appointment scheduling
What could be improved
  • Office environment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
  • Long wait times
2 others found this helpful
Helpful
Vb in Aurora, IL – Feb 25, 2017
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One of the worst doctors I have ever seen. Rude, disrespectful, and just plain mean. He doesn't care about patients and this was shown by his horrible bedside manner. He needs training on how to be nice to people.
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Appointment was rushed
  • Didn't trust the provider's decisions
4 others found this helpful
Helpful
Wheaton, IL – Feb 17, 2017
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Dr. Bayer is so nice. He listens and is excited when he sees me progressing in my health. Worked consistently to get my thyroid medication to the appropriate level.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
5 others found this helpful
Helpful
Chicago, IL – Oct 18, 2016
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Rude bedside manner, rushes through, and was annoyed when I had to mention multiple health issues. He really seems to hate his job. Probably competent with thyroid issues but just too rude and unhappy!
What went well
No results
What could be improved
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
7 others found this helpful
Helpful
IL – Jun 30, 2016
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Dr Bayer acted like a robot. Dr Bayer made eye contact 5 seconds during the entire appointment. He spent all his time filling out forms on his computer instead of listening to any concerns I had. His bedside manner is horrible, he is extremely unwilling to entertain other professional opinions. He was very concerned about if insurance will cover instead of the care of the patient, save yourself the frustration find a different doctor who cares about your health & issues.
What went well
  • Wait times
What could be improved
  • Office environment
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Appointment was rushed
  • Didn't trust the provider's decisions
8 others found this helpful
Helpful
Aurora, IL – Mar 05, 2016
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Everything I heard about Dr. Bayer from other Doctors and the general public is true. He will take the extra mile on getting to the root of your issues. I felt comfortable with his personality and concern for my health and well being.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
6 others found this helpful
Helpful
Linda in Aurora, IL – Feb 18, 2016
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Wouldn't recommend.
What went well
No results
What could be improved
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Didn't trust the provider's decisions
  • Long wait times
9 others found this helpful
Helpful
Jan 13, 2016
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Know Before You Go

About Me

care philosophy

``Better people means better experiences. Our care team is committed to delivering results that change lives.`` 

  • Endocrinology, Diabetes & Metabolism

  • Internal Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Loyola University Medical Center

    Fellowship Hospital

  • Loyola Medical Center

    Residency Hospital, 1989

  • Loyola University Chicago Stritch School Of Medicine

    Medical School, 1986
American Board of Medical Specialties®
American Board of Internal Medicine®
- 
Diabetes, Metabolism & Endocrinology
- 
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

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Locations

Practice

Northwestern Medicine Regional Medical Group233 S Gary Ave Bloomingdale, IL 60108
1

Affiliated Hospitals

  • Northwestern Medicine Central Dupage Hospital

    25 N Winfield Rd
    Winfield, IL 60190
    Recipient of 8
    hospital awards

    Patient Safety Excellence Award™ (2025)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    Outstanding Patient Experience Award™ (2024, 2022)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    87%
    Patients said they were given information about recovering at home

    3% higher than the national average

    80%
    Patients would recommend the hospital to friends and family

    15% higher than the national average

    View all patient feedback

  • Edward Hospital-Main Campus

    801 S Washington St
    Naperville, IL 60540
    Recipient of 9
    hospital awards

    Patient Safety Excellence Award™ (2025)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    Outstanding Patient Experience Award™ (2023, 2022)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    84%
    Patients said they were given information about recovering at home
    78%
    Patients said that doctors always listened to them and explained things well

    2% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality