About Stephen Zaacks, MD
Stephen Zaacks, MD, a cardiologist at Endeavor Health, specializes in interventional cardiology and leads the cardiac catheterization lab at Northwest Community Hospital. He treats patients with acute heart conditions, including heart attacks and cardiogenic shock, and provides ongoing preventive care. Dr. Zaacks combines rapid procedural expertise with long-term management to reduce patients’ future cardiovascular risk through medication and lifestyle changes.
My endeavor
My endeavor is to continue to provide the excellent care that we have provided here at Northwest Community Hospital for over the last two decades I’ve been here.
Care philosophy
I enjoy meeting patients in an emergency setting, helping them quickly with a procedure, then continuing to follow them for years to reduce their risk of future events through medications and lifestyle changes.
Overview
- Gender Male
Endeavor Health Medical Group
1632 W. Central Rd.
Arlington Heights, IL 60005-2407
Arlington Heights, IL 60005-2407
Endeavor Health Medical Group
21481 N. Rand Rd., Cardiology
Kildeer, IL 60047-3061
Kildeer, IL 60047-3061
Medical School
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1992Northwestern Feinberg School of Medicine
Residencies
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1995Internal MedicineNorthwestern Feinberg School of Medicine
Fellowships
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1999Cardiovascular DiseaseRush-Presbyterian-St Luke's Medical Center
Board certifications
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1998Cardiovascular DiseaseAmerican Board of Internal Medicine
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2000Interventional CardiologyAmerican Board of Internal Medicine
Reviews (129)
March 22, 2026
My appointment needed to be rescheduled by the doctor but I got sufficiently early notice,
March 22, 2026
He doesn't rush you, is kind caring and excellent surgeon
March 20, 2026
Excellent
March 20, 2026
Dr Zachs and his nurse were welcoming friendly and informative. I love this group!
March 8, 2026
In have been under Dr Zaack's care for at least 13 years, starting in 2012 for coronary arterial stents, with a similar procedure a couple years ago. Always the consummate professional, kind, patient, thorough, knowledgeable and a truly detailed craftsman. Just the best. Very lucky to have him (and staff) on my team!
March 6, 2026
Dr Zaacks is the best. Listens and follows your treatment desires as best for you. Always timely.
March 6, 2026
Appreciate the attention and thoroughness Dr. Zaacks provides.
March 6, 2026
Dr Zaacks is excellent....has been my cardiologist for probably 20 years...nothing but good things to say about him.
March 5, 2026
Thank you for listening to my concerns and helping me to do the things that I need to do.
March 3, 2026
Dr Zzacks is extremely personable
February 27, 2026
Dr. S. Zaachs was very professional. He was very knowledgeable and helpful. He explained to me the results of my EKG and the Stress Test that he ordered so he can properly diagnosis my health issues! He has a very good bedside manner and since my husband is also his patient he asked how he was doing after a procedure he did to him about a few weeks ago since we saw him post procedure in his office!
February 27, 2026
Staff were all wonderful and helpful to me and my 90 year old father!
February 20, 2026
Dr Zaacks is a very kind, caring doctor. He answered questions and made me feel comfortable.
February 15, 2026
Dr. Zaacks is great, His professionalism, knowledge and concern for his patients put him at the top rung of medical professionals.
February 9, 2026
Excellent. Dr and Nurse very attentive.
February 8, 2026
Dr. Zaacks is always kind, informative and thorough.
February 6, 2026
He was very good and will recommend to others
February 5, 2026
Love Dr. Zaaks
February 3, 2026
Quality of care is always good
February 1, 2026
He is easy to reach by phone and portal and cares about his patients. He always follows up on test results promptly and I recommend him all the time.
January 30, 2026
I am very pleased with Dr. Zaacks. He explains everything thoroughly and listens to my concerns, etc.
January 27, 2026
Very personable
January 24, 2026
Dr. Zaacks is one of the best doctors that there is. He saved my life!
January 23, 2026
Dr. Zaacks and [...] were great!
January 20, 2026
EXCELLENT IN EVERY RESPECT
January 18, 2026
About one month prior to my original appointment I was informed I would need to change my appointment. We found a convenient new time and rescheduled the appt. I understand a cardiologist schedule can change and appreciate I was informed in advance and was able to easily find a convenient new appointment.
January 18, 2026
There were minimal wait times (good). Dr Zaacks doesn't waste time but is never rushed. I feel like I have time to discuss relevant matters and that I have his complete attention for my whole visit.
January 16, 2026
Very friendly and helpful
January 16, 2026
Dr. Zaacks is the best! Encouraging and a very nice man.
January 16, 2026
Great doctor. He takes time to listen and offers health advice. Highly recommended
January 14, 2026
Dr. Zaacks is a very intelligent doctor that takes time with his patients and listens to their concerns. He is kind and respectful. He has a very good understanding of a patient's health. We need more doctors like him .
January 5, 2026
Love Zaacks, busy guy. No issue with him, or the office. The being able to schedule something closer and closer to when I needed was GREAT with my chart.
December 21, 2025
Dr. Zaacks is a very thorough and caring physician. I trust my cardiac care to his recommendations.
December 21, 2025
Very positive experience. Answered all my questions. Informed me about my test results and health
December 10, 2025
Friendly, professional & on time
December 10, 2025
Steven M. Zaacks is an outstanding physician. He already saved my life many years ago and I have not had any issues since that time. I would recommend Dr. Zaacks to anyone and everyone.
December 9, 2025
I find him to be personable and informative regarding my current condition and the medical plan going forward. .
December 8, 2025
Excellent
December 8, 2025
Thank you !!!
December 7, 2025
Dr. Zaacks has been my doctor for 25 years. I trust and respect him.
December 7, 2025
Caring. Thorough. Skilled.
November 23, 2025
I love my cardiologist
November 16, 2025
Very knowledgeable
November 14, 2025
They were amazing.
November 14, 2025
Very courteous, caring and knowledgeable. The staff is professional and concerned about your health.
November 13, 2025
Doctor and nurses where nice
November 11, 2025
Dr. Zaacks is a very professional man who treats me kindly, and answers any questions.
November 10, 2025
Dr Zaacks and all the staff at there are excellent.
November 6, 2025
I can't say enough good things about Dr. Zaacks !
November 5, 2025
Top notch,
October 24, 2025
Great service.
October 24, 2025
Excellent serviceProvider did a wonderful job
October 20, 2025
Excellent care
October 19, 2025
He answered my questions and we had a good talk.I'm assuming that this was with Dr. Zaacks.
October 19, 2025
Dr. Zaacks was very attentive to my concerns
October 12, 2025
Dr. Zaacks Saved my life with a stent a couple of years ago and he continues to keep me going. I'm very appreciative.
October 12, 2025
I was very comfortable at my appointment
October 8, 2025
Excellent doctor. I trust his opinion.
October 6, 2025
Very caring personnel
October 6, 2025
Provider very knowledgeable, Could answer our concerns and the reason why we were there, & and how to live with the problem.
September 30, 2025
Great doctor. Have been with for years. However it's difficult to schedule my next 6 month appointment. Nothing available for 8 months.
September 24, 2025
Detailed and informative
September 21, 2025
Efficient & straight to the point.
September 21, 2025
Fantastic!!! Great with patience!!!
September 20, 2025
My experience was good.
September 17, 2025
Knowledgeable.. Explained everything going on succinctly
September 16, 2025
Dr Zaacks is the best!!
September 16, 2025
My cardiologist is always thoughtful and concerned about any issues I might have,
September 3, 2025
Dr. Zaacks is thorough, knowledgeable and professional. He is patient and takes time to answer any questions or concerns.
September 1, 2025
Very personable
September 1, 2025
Dr. Zaacks and his staff are outstanding.
August 31, 2025
Dr. Zaacks was efficient and polite. His nurse was very thorough, efficient & friendly. She made me feel comfortable & relaxed.
August 22, 2025
Kind and courteous
August 12, 2025
Listens to patient and then responds.
August 10, 2025
I'm 80 years old and Dr. Zaacks is one of the finest Physicians I've ever interacted with. He listens and asks questions based on my responses, and since I'm a Mathematician and not a physician, Dr. Zaacks has a great deal of interpreting to do when engaged in a conversation with me. Dr. Zaacks obviously cares for his patients.
August 10, 2025
Always cordial, thorough, listens to my concerns
August 10, 2025
The services were great and everyone was very attentive, took the time to explain and help us through this process which is a complicated one given we came from out of town.
August 8, 2025
Dr Z. Is the best !!
August 5, 2025
Everyone I worked with was very kind and helpful
August 3, 2025
From my first pre-op hospital meeting through all my follow-up office visits, I've always appreciated Dr. Zaack's combination of confidence-inspiring professionalism and warm, caring friendliness. I'm glad to say that one of my best friends is now under Dr. Zaack's care as well.
August 3, 2025
Very excellent.
July 28, 2025
Very pleasant and efficient service providers from the nurse and the physician.
July 28, 2025
Dr Zaacks is a great doctor. Compassionate and good listener.
July 21, 2025
Always excellent service and care.
July 21, 2025
Dr. Zaacks is excellent. Thorough, professional, reviews all the pertinent information, ask questions and listens. Truly concerned about me and my ability to continue his recommended regimen. I have recommended him to several people.
July 21, 2025
The provider was knowledgeable and helpful in deciding the best way to treat my issue. He suggested a new medication.
July 21, 2025
Dr Zaaks as all of my endeavor. Doctors are extremely supportive and I thank God they are all part of my support group.!!
July 14, 2025
I've been satisfied with your different locations and the Dr's and employees for year's.
July 14, 2025
Very kind Understanding people
July 7, 2025
Stephen and the entire staff, have always provided excellent care and are ahead of my needs in most situations.
June 29, 2025
Best cardiologist.
June 25, 2025
On time and answered all my questions.
May 30, 2025
I can't say enough how great he is .
May 19, 2025
Friendly
May 19, 2025
Very good
May 12, 2025
Dr. Zaacks is very good and nice.
May 9, 2025
Care was excellent.
May 8, 2025
Great as always
April 21, 2025
No complaints or issues.
April 20, 2025
Dr. Zaacks and staff are excellent.
April 7, 2025
Great cardiologist!
March 25, 2025
Excellent, very good
March 17, 2025
Thoughtful, answered all questions. Very happy with him.
March 17, 2025
Very pleased
March 17, 2025
Keep the great work
March 10, 2025
Thank you Dr Zaacks
March 1, 2025
My court care was excellent
February 26, 2025
I'm very happy with dr. Zaacks. He listens to me. He explains and answers my questions thoroughly. I'm very comfortable with him.
February 26, 2025
Dr. Zacks listens carefully and we have good discussions about what is happening and provides options for my plan of care.
February 22, 2025
Great, knowledgeable dr.
February 21, 2025
Very professional
February 17, 2025
Great! Tony the Tiger GREAT!
February 17, 2025
I think the whole team and doctor is very professional and friendly. They make the visits very comfortable and easy
February 17, 2025
Dr. Zaacks is informative and kind
February 12, 2025
Has been my cardiologist for 15 years; always practical with treatment advice and choices.
February 10, 2025
Dr Zaacks listens and is attentive and easy to talk to, and an excellent physician
February 9, 2025
Doctor very caring and explains things thoroughly.
February 9, 2025
Dr. Zaacks listened to my concerns and addressed them professionally and thoughtfully.
February 7, 2025
Does not RUSH with visit. Always pleasant & has a lot of patience
February 7, 2025
They're very caring
February 4, 2025
Always thorough and patient. Listens to me.
February 1, 2025
Very courteous very thorough
January 31, 2025
My primary Dr. Valdecantos and her staff are always very nice and willing to help me with any issues or questions I may have.
January 24, 2025
He keeps me ticking
January 20, 2025
Excellent care and concern always.
January 19, 2025
Not the nicest person, yet efficient in doing the job.
January 15, 2025
Excellent, and I always feel supported by all physicians and staff!!
January 13, 2025
Very good
January 12, 2025
Dr. Zaacks and his staff are excellent, Dr.Zaacks has been my cardiologist for at least 18 years, and I am forever grateful to him for keeping me healthy.
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