Steven C Harnack

Steven C Harnack, M.D.

2285 Sequoia Drive

Aurora, Illinois 60506

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Steven C Harnack, M.D.

Internal Medicine

2285 Sequoia Drive

Aurora, Illinois 60506


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About Me



  • Residency: Mercy Hospital & Medical Center
  • Medical School: University of Illinois College of Medicine

Hospital Affiliations

  • Advocate Dreyer

Ratings and Comments

Steven C Harnack, M.D.

4.8 out of 5

421 Patient Ratings

Gives easy to understand instructions

4.8 out of 5

354 Patient Ratings

Explains in a way you understand

4.8 out of 5

414 Patient Ratings

Listens carefully to you

4.8 out of 5

416 Patient Ratings

Knows your important medical history

4.6 out of 5

417 Patient Ratings

Shows respect for what you say

4.9 out of 5

419 Patient Ratings

Spends enough time with you

4.7 out of 5

418 Patient Ratings


Better than expected.

Reviewed on July 21, 2019 7:00 PM

A very helpful visit with this provider.

Reviewed on July 12, 2019 7:00 PM

We've always had good experience with Dr. Harnack. He has my primary since Dr. David Lucks left Dreyer.

Reviewed on July 9, 2019 7:00 PM

he was in the room about 5 minutes. did one thing to examine my hips. didn't bring up last visit which had a significant health issue.

Reviewed on June 16, 2019 7:00 PM

Good experience.

Reviewed on June 12, 2019 7:00 PM

I always feel Dr Harnack has helped me with my health issues every visit or gives me advice to try new procedures.

Reviewed on May 3, 2019 7:00 PM

Dr. Harnack is a new provider for me, since my previous provider is no longer available. He was very thorough, a good listener, and understanding.

Reviewed on April 28, 2019 7:00 PM

gained good information on things I might want to do.

Reviewed on April 28, 2019 7:00 PM

Like Dr Harnack.

Reviewed on April 22, 2019 7:00 PM

I really like Dr. Harnack.

Reviewed on April 17, 2019 7:00 PM

Dr. was visibly upset that I brought up my opinion for trying an alternative homeopathic/natural new prescription and drop the old one.

Reviewed on April 14, 2019 7:00 PM

Dr. Harnack is great!

Reviewed on April 14, 2019 7:00 PM

He met my needs.

Reviewed on March 30, 2019 7:00 PM

Dr. Harnak is a kind and understanding doctor. I believe he has a good understanding of me as a patient and offers alternative solutions other than medications. He has the experience of wearing different hats as a doctor. He is a good listener and a pretty funny too.

Reviewed on March 22, 2019 7:00 PM

Dr. Harnack is always helpful

Reviewed on March 17, 2019 7:00 PM

took time to answer my questions and did some checking of skin problems etc. it's always been a good relationship.

Reviewed on March 17, 2019 7:00 PM

Very good.

Reviewed on February 24, 2019 6:00 PM

I recently moved to the area and am looking for a new GP. I felt quite at ease with the doctor and thought he listened to me. He offered great information and we had pleasant conversation related to medical issues. I now have a new GP and it is Dr. Harnack.

Reviewed on February 17, 2019 6:00 PM

Dr . Harnack is an excellent doctor. He answers all my questions and answers e-mails quickly. I would recommend him to ly friends and family. He treats me respectfully and answers any questions I might have.

Reviewed on February 17, 2019 6:00 PM

As usual, I had a list of questions for discussion. He listened to my questions and discussed each one. Wonderful experience!

Reviewed on February 11, 2019 6:00 PM

The doc was great as well as all I came in contact with.

Reviewed on February 11, 2019 6:00 PM

Front counter where you check in was very slow last visit the provider is doing a good job with my

Reviewed on February 4, 2019 6:00 PM

She is always confident with Dr. Harnack.

Reviewed on January 29, 2019 6:00 PM

appt was for significant dizziness. was told it was likely vertigo, but given no info as to why or what to do about it. I'm coming in again this week with my primary doctor, who I can rarely get an appt with, as it hasn't improved. This appt was a waste of my time.

Reviewed on January 29, 2019 6:00 PM


Reviewed on January 29, 2019 6:00 PM

Doctor helped me with decisions about my future health.

Reviewed on January 29, 2019 6:00 PM

very good

Reviewed on January 28, 2019 6:00 PM

I have been with my provider for many years. feel very confident about his care and quite comfortable in his presence. he seems very caring and always listens to me.

Reviewed on January 27, 2019 6:00 PM

very good

Reviewed on January 27, 2019 6:00 PM

Cares about my health and well-being more than I do. which is good.

Reviewed on January 27, 2019 6:00 PM

Tech was very friendly and put me at ease checking me in and getting vitals. Dr came in also very nice. We talked and I was very satisfied. Set up my next appointment.

Reviewed on January 27, 2019 6:00 PM

Been seeing Dr.Harnack for years, very glad he's my doctor, I even recommended him to two friends now he's thier doc too!

Reviewed on January 25, 2019 6:00 PM

Dr. Harnack is always very personable, knowledgeable and attentive to any questions/concerns I have and very helpful w/referring me to other doctors, therapists for specific issues that come up.

Reviewed on January 24, 2019 6:00 PM

This was my "transition visit" after my 37 year relationship with Internist and friend X had ended with his retirement 6 months earlier. I was very pleased with Dr Harnack, although a bit disappointed when the two referrals had not gone through in 5 weeks, allegedly due to Advocate computer transitioning.

Reviewed on January 13, 2019 6:00 PM

Very good.

Reviewed on November 29, 2018 6:00 PM

The best ever.

Reviewed on November 15, 2018 6:00 PM

Have seen him for years, and we communicate well. If we didn't, I'd move on.

Reviewed on November 15, 2018 6:00 PM

Excellent Doctor.

Reviewed on November 10, 2018 6:00 PM

My Primary care physician retired in June. This was my first visit to officially establish Dr Harnack as my new primary care Physician. I am very happy with him, his level of competence and care and how I was treated.

Reviewed on November 8, 2018 6:00 PM

Exceptional - my highest evaluation!

Reviewed on October 16, 2018 7:00 PM

great experience

Reviewed on October 6, 2018 7:00 PM

This was my first visit. We talked for about 15 min. He only checked my heart and lungs. He did not discuss my blood test which was taken a week before the appointment.

Reviewed on September 18, 2018 7:00 PM

always concerned, never in a hurry. down to earth advice. Great guy

Reviewed on September 16, 2018 7:00 PM

Dr. Harnack, keep up the great work. I am grateful to have you as my health care provider.

Reviewed on September 15, 2018 7:00 PM

I feel that the provider doesn't do as much as they use to do years ago.

Reviewed on September 15, 2018 7:00 PM

It was a pleasure to meet Dr. Harnack. He was very polite, soft-spoken, and did a great job during my wellness check. He renewed prescriptions, ordered all the future procedures that I will need, and listened to my "getting old complaints."

Reviewed on September 10, 2018 7:00 PM

very pleased with the short wait time.

Reviewed on September 10, 2018 7:00 PM

He was very nice and helpful - Friendly and explained everything in understandable terms.

Reviewed on August 22, 2018 7:00 PM

Dr. Harnack is patient, kind and he notices things about you that other doctors do not. He has an easy-going demeanor, yet states what is important for good health. I felt he listened and understood me and my health care.

Reviewed on August 20, 2018 7:00 PM

He is a very caring person and competent but completely over-worked and over-scheduled.

Reviewed on August 13, 2018 7:00 PM

Dr. Harnack, excellent dr., caring, listening to all questions! Been with him for years!

Reviewed on July 16, 2018 7:00 PM

Since becoming Advocate, you do not allow the Dr. enough time for each appt. They are rushed through the appt. time. It's just not the same as it was when they were just Dreyer Medical.

Reviewed on July 2, 2018 7:00 PM

Dr. Harnack has been my doctor for many years and I am very satisfied with his care.

Reviewed on June 19, 2018 7:00 PM

Dr. Harnack is always easy to talk with.

Reviewed on May 28, 2018 7:00 PM

I always receive excellent care from Dr. Harnack and his office staff! I am very happy that Dr. Harnack is on the health team here!

Reviewed on May 21, 2018 7:00 PM

I appreciate Dr. Harnack.

Reviewed on May 8, 2018 7:00 PM

It was a very nice visit.

Reviewed on May 5, 2018 7:00 PM

Dr. Harnack has my complete and total confidence, he is a consummate professional, THOROUGH, HONEST and compassionate.

Reviewed on May 1, 2018 7:00 PM

Nurse/assistants have always been very good/personable and attentive to questions and observations.

Reviewed on April 30, 2018 7:00 PM

Dr. Harnack has been our provider for many years. We are very happy with him.

Reviewed on April 23, 2018 7:00 PM

Dr. Harnack is always courteous and easy to talk to, and he listens to my concerns and answers them clearly. I feel that I have a very good doctor.

Reviewed on April 20, 2018 7:00 PM

Dr. Harnack is great. He does good work and cares for both my wife and me.

Reviewed on April 18, 2018 7:00 PM

great doctor

Reviewed on April 14, 2018 7:00 PM

it was good...routine.

Reviewed on April 7, 2018 7:00 PM

Dr.Harnick was very nice & helpful

Reviewed on April 2, 2018 7:00 PM

Dr. Harnack is the best doctor. He's very kind and understanding. He also saved my life as he got me to quit smoking in a very kind way and told me that he would be there for me.That was 19 years ago. Dr. Harnack always explains everything to you so you can understand how important blood pressure and other things are for you.

Reviewed on March 26, 2018 7:00 PM

Dr Harnack has been my provider for 18/19 years. I trust what he has to say and feel he has my best interest at heart. He is patient and never seems to rush me and LISTENS to what I have to say.

Reviewed on March 26, 2018 7:00 PM

Dr Harnack is the best.

Reviewed on March 9, 2018 6:00 PM

I always trust Dr. Harnack. He has been my PCP for over 20 years...

Reviewed on March 4, 2018 6:00 PM

i've been going to this provider for many years. very comfortable with him.

Reviewed on February 26, 2018 6:00 PM

Dr. Harnack helped me greatly regarding the concerns I had about health issue. He always gives me time to talk over any health concerns! I'm never hurried.

Reviewed on February 19, 2018 6:00 PM

Very friendly & excellent facilities. Thanks for the checkup!

Reviewed on February 18, 2018 6:00 PM

Concerned, kind, considerate, patient, non-rushed, non-judgmental.

Reviewed on January 30, 2018 6:00 PM


Reviewed on January 29, 2018 6:00 PM

Said he was on time but waited 30 mins. to see him.

Reviewed on January 25, 2018 6:00 PM

I got answers I was seeking out and I'm satisfied.

Reviewed on January 15, 2018 6:00 PM

Dr. Harnack was on time, he's friendly, competent, always listens carefully, and makes me feel comfortable having him for my internist.

Reviewed on January 6, 2018 6:00 PM

The nurse is also excellent.

Reviewed on December 28, 2017 6:00 PM

I like Dr. Harnack very much. I was having problems with my heart. He got me appt for heart doctor right away. Probably saved my life.

Reviewed on December 28, 2017 6:00 PM

Dr. Harnack is #1 on my Dryer health team. He is not only a great doctor but offers me great insight on life also!

Reviewed on December 28, 2017 6:00 PM

Excellent - been with Dr. Harnack for years.

Reviewed on December 28, 2017 6:00 PM

Dr. Harnack is friendly and has provided excellent care and advice on health matters over the past 25 years. He has common sense!!

Reviewed on December 27, 2017 6:00 PM

Keep up the excellent work

Reviewed on December 2, 2017 6:00 PM

Dr. Harnack is the best!

Reviewed on November 21, 2017 6:00 PM

Dr Harnack spent ample time talking with me about my general health, listened to my concerns, provided me clear feedback and I did not feel once that he was judgmental or inconvenienced. He was very attentive and a fabulous primary.

Reviewed on November 20, 2017 6:00 PM

I feel good about meeting this Doctor for the first time.

Reviewed on November 13, 2017 6:00 PM

Went very well.

Reviewed on November 12, 2017 6:00 PM

Doctor is superlative and would lie down and let him do anything needed with full trust in his knowledge and care for absolute sue.

Reviewed on November 1, 2017 7:00 PM

Dr. Harnack is a great doctor. so pleasant yet very concerned about your health.

Reviewed on October 23, 2017 7:00 PM

Wonderful caring dr.

Reviewed on October 4, 2017 7:00 PM

Dr. Harnack is now and has always been a VERY good Doctor! We would not want to change.

Reviewed on September 19, 2017 7:00 PM


Reviewed on August 27, 2017 7:00 PM

determined a need for immediate follow up procedure with cardiology, which was handled promptly.

Reviewed on August 17, 2017 7:00 PM

It's always a pleasure to see Mr. Harnack asking on I am and if everything is OK. I always ask him how he is.

Reviewed on August 15, 2017 7:00 PM

he helped me with my meds. He set up references for a new procedure. we have gone to Dr Harnack for many years and are very confident in his care for us athank you Dr Harnack. We appreciate your interest in our health.

Reviewed on August 14, 2017 7:00 PM

I am not young but I am always treat as an equal and not talked down to. I know I am 77 but I also know that I live a active and full life. Dr Harnack also treats me as an intelligent individual who happens to be 77.

Reviewed on August 14, 2017 7:00 PM

all good

Reviewed on August 14, 2017 7:00 PM

Dr. Harnack has been my PCP for 20+ years. He listens and is an excellent physician..

Reviewed on August 7, 2017 7:00 PM

I was in a great deal of pain. Urgent Care would only offer minimal help. Dr. Harnak saw me quickly. Much appreciated.

Reviewed on July 17, 2017 7:00 PM

Very good.

Reviewed on June 18, 2017 7:00 PM

health eNews with Steven C Harnack, M.D.

Medical Areas of Expertise

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  • AAH Preferred – Team Member Plan
  • AAH Select – Team Member Plan
  • Aetna Basic
  • Aetna Classic
  • Aetna HMO
  • Aetna Managed Choice (MC) POS
  • Aetna NAP - PPO
  • Aetna Open Access POS
  • Aetna Open Choice POS
  • Aetna Open Choice PPO
  • Aetna Select Choice EPO
  • Aetna Signature Administrators PPO
  • Aetna US Healthcare Medicare Advantage HMO
  • Beech Street / PPO Next Wrap Plus
  • Beech Street Network PPO
  • Blue Advantage HMO
  • Blue Choice PPO
  • Blue Cross HMO Illinois
  • Blue Cross Medicare Advantage HMO
  • Blue Cross Medicare Advantage HMO - POS
  • Blue Cross PPO
  • Blue Cross PPO - Advocate Associate Medical Plan
  • Blue Precision Bronze HMO
  • Blue Precision Gold HMO
  • Blue Precision HMO
  • Blue Precision Platinum HMO
  • Blue Precision Silver HMO
  • BlueCare Direct
  • Cigna - Great West Health EPO
  • Cigna - Great West Plus
  • Cigna Open Access Plus POS
  • CIGNA Open Access POS
  • Cigna POS
  • Cofinity PPO
  • Coventry / Personal Care POS
  • Coventry Advantra Medicare HMO
  • Coventry HMO
  • Coventry One Select PPO
  • Coventry PPO
  • First Health (Coventry) Rental PPO
  • First Health Network EPO
  • First Health Network PPO
  • Great West Healthcare - Cigna HMO
  • Great West Healthcare - Cigna Open Access Plus HMO
  • Health Alliance ICP
  • Health Alliance MMAI
  • Healthlink PPO
  • HFN Platinum EPO
  • Humana Choice Care Network PPO
  • Humana DuPage Medical Group HMO
  • Humana DuPage Medical Group HMO - HMO Select
  • Humana EPO - Advocate Associate Medical Plan
  • Humana Gold Plus HMO
  • Humana HMO - Advocate Associate Medical Plan
  • Humana HMO Select
  • Humana Illinois Platinum HMO
  • Humana Integrated Care Program of Illinois
  • Humana Medicare Choice PFFS
  • Humana Medicare Choice PPO
  • Humana National HMO
  • Humana National POS - Open Access
  • Humana National PPO
  • Humana PPO - Advocate Associate Medical Plan
  • Meritain Health PPO
  • MultiPlan PPO
  • PHCS Savility PPO
  • Three Rivers Provider Network PPO
  • UFCW Local 1546 Health and Welfare Fund (UMC)
  • United Healthcare AARP
  • United Healthcare Basics PPO
  • United Healthcare Caterpillar
  • United Healthcare Charter
  • United Healthcare Choice HMO
  • United Healthcare Choice Plus POS
  • United Healthcare Core PPO
  • United Healthcare EPO
  • United Healthcare HMO
  • United Healthcare Indemnity
  • United Healthcare Navigate HMO
  • United Healthcare Navigate POS
  • United Healthcare Nexus
  • United Healthcare POS
  • United Healthcare PPO
  • United Healthcare Select EPO
  • United Healthcare Select HMO
  • United Healthcare Select Plus POS


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Information listed under the "clinical interests" columns was supplied by the physicians. It is provided to you for informational purposes only, and neither Advocate Health Care nor the Advocate facility has independently verified the information. If you wish to confirm the information contained herein, or if you have any other questions about a particular physician, please contact the physician’s office.

Unless otherwise stated, physicians are independent practitioners who are not employees or agents of Advocate Health Care or the Advocate facility where the care is being provided. Neither Advocate Health Care nor the Advocate facility shall be liable for the medical care provided or decisions made by these independent physicians.

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