About Katarzyna Zarnecki, DO
Katarzyna G. Zarnecki, DO, a specialist in endocrinology, diabetes & metabolism at Endeavor Health, treats a range of hormonal and metabolic disorders including thyroid disease, pituitary tumors and diabetes. She speaks English and Polish and offers advanced therapies such as insulin pump management and thyroid biopsies.
Overview
- Languages Polish
- Gender Female
Conditions treated (23)
- Hyperlipidemia
- Diabetes
- Hypertension
- Hyperparathyroidism
- Obesity
- Adrenal disorders
- Pituitary adenoma (micro or macro- adenoma)
- Parathyroid disease
- Thyroid disease
- Calcium disorders
- Endocrine issues in pregnancy
- Pituitary disease
- Bone loss (osteopenia)
- Thyroid nodules
- Diabetes type 1
- Diabetes type 2
- Testosterone disorders
- Graves disease
- Adrenal insufficiency
- Cushing disease
- Cushing syndrome
- Diabetes insipitus
- Polycystic ovarian syndrome
Procedures performed (3)
- Thyroid biopsy
- Insulin pump
- Continuous glucose monitoring
Endeavor Health Medical Group
2151 Waukegan Rd., Suite 140
Bannockburn, IL 60015-1868
Bannockburn, IL 60015-1868
Endeavor Health Medical Group
9977 Woods Dr., Suite 300
Skokie, IL 60077-1057
Skokie, IL 60077-1057
Medical School
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2007Midwestern University Chicago College of Osteopathic Medicine
Fellowships
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2014Endocrinology/Metabolic DMedical College of Wisconsin
Board certifications
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2014Endocrinology, Diabetes & MetabolismAmerican Board of Internal Medicine
Reviews (115)
January 8, 2026
She is very thorough and kind.
December 17, 2025
Dr. Zarnecki is amazing. She is caring, knowledgeable and takes the time to explain things to me
December 14, 2025
She is very kind and listens to my concerns and questions
December 10, 2025
Fabulous, knowledgeable, Thorough and kind endocrinologist Is so unfortunate that it takes a year to get in to see her as well as any other endocrinologist on your staff work on recruiting more endocrinologist
December 9, 2025
Have not complaints
December 6, 2025
She was very professional and prompt for the appointment.
December 4, 2025
I feel extremely confident that I am getting the best care with Dr. Zarnecki. She is always extremely knowledgeable and informative with any updates/alterations to prescriptions and treatment plans.
December 3, 2025
Dr Zarnecki is wonderful. She asks pertinent questions and answers my questions in a way that I can understand. I appreciate her care very much.
November 27, 2025
Dr. Zarnecki is phenomenal. Takes as much time as you need and answers questions in detail. Very kind and knowledgeable.
November 21, 2025
OUTSTANDING PHYSICIAN WHO IS THE #1 REASON I CONTINUE TO WORK WITH ENDEAVOR HEALTH.
November 19, 2025
Dr. Zarnecki has amazing conversational bedside manner and is extremely knowledgeable in her field. Feel very confident that I have a reliable advocate in her.
November 15, 2025
Dr, Zarnecki was very thorough She reviewed all of my tests and explained to me what might be going on, and she answered all of my questions. She even drew a picture to illustrate what was happening in my body.
November 12, 2025
Dr Zarnecki is terrific. She is smart and kind, both traits which are rarely found in physicians today.
November 11, 2025
Very informative answered all my concerns,
November 9, 2025
Outstanding Endocrinologist! A truly caring medical professional!
November 7, 2025
Dr. Zarnecki listens to your concerns.
November 6, 2025
Dr. ZARNECKI is very meticulous in her endocrinology practice. She has provided me with excellent care!
October 31, 2025
Dr. Z. Is excellent. She's professional, kind and compassionate.
October 30, 2025
Dr. Zarnecki is absolutely the best in the endocrinologist area .. I LOVE HER am so happy to be back with her
October 27, 2025
Care is always fantastic. The physician is alwys upbeat,positive,receptive to my concerns,and provides alternatives to my care. Dr. Z is Wonderful!
October 23, 2025
My care provider never rushes through my appointments. They're attentive and thorough throughout the visit. They provide several recommendations to discuss before deciding on the plan together.
October 19, 2025
Super nice and caring.
October 18, 2025
Dr. Zarnecki is the best! She takes time to listen to your needs, and to address your whole health situation. She isn't like other doctors who just dismiss your system. I'm so glad I found her!
October 12, 2025
Dr. Zarnecki is fantastic. She is warm competent and professional, which is not a combination you come across too often. And she really seemed to care about my health.
October 12, 2025
Excellent medical care. I have received treatment for chronic condition that has kept me stable for many years.
October 9, 2025
Love Dr. Zarnecki. Never has one foot out the door.
October 9, 2025
I received excellent care.
October 7, 2025
She is very professional and caring.
October 3, 2025
Dr Zarnecki is the best .She is a very good doctor .
September 27, 2025
Dr Zarnecki is a great doctor, she listens and provides options
September 22, 2025
I am very satisfied with Dr. Zarnecki she is very good. I have recommended her to some friends
September 19, 2025
Dr. Zarnecki is excellent. She is thoughtful and analytical about the factors that affect my care. Great doctor!
September 16, 2025
This was my first time meeting with Dr. Zarnecki. She was very thorough, attentive, and combed through years of surgery history and test results in order to formulate a go-forward plan for me. I enjoyed meeting her and will definitely return. I have been cared for in this practice for twelve years but had to switch providers due to a departure.
September 16, 2025
Excellent
September 12, 2025
Dr Z is the best ! She always makes me feel better about myself when I leave.
September 11, 2025
Dr Zarnecki did a great job of helping me with my issues. We went over my options and follow up.
September 10, 2025
Trusted health care advisor and practitioner.
September 1, 2025
The doctor and care team were excellent at this appointment. You could tell they cared about making sure I had all the information and explained everything thoroughly. One of the best experiences I've had so far at Endeavor.
August 31, 2025
My provider is friendly to talk to she takes time to explain.
August 28, 2025
I appreciate how Dr. Zarnecki gives options and includes me in my care.
August 25, 2025
Never feel rushed, always answers questions thoroughly.
August 23, 2025
Very caring.
August 23, 2025
Dr. Zarnecki is a superb physician. Her medical expertise is outstanding! She is kind, compassionate and gives you as much time during your visit as you need. I leave Dr. Zarneckis office, knowing that I have received the best possible care. I have and always will refer her to my friends and family.
August 20, 2025
It's wonderful to have a physician who doesn't just practice medicine, but truly takes care of the patients needs. Our appointments are always beneficial.
August 10, 2025
Dr. Zarnecki Is very kind and compassionate. She is patient and spends as much time as necessary to discuss my health issues and answer questions. She is proactive in communicating and consulting other doctors on my health team. I am blessed to have her as my doctor for endocrinology.
August 10, 2025
Dr. Zarnecki is shining example of what we want our doctors to be: caring, patient, informative and understanding . My husband has both type 1 diabetes and Alzheimer's ; Dr. Z circumvents the obstacles to find a satisfactory solutionTo his issues.She is a God send.! !!
August 2, 2025
Dr Zarnecki truly showed patience and perseverance
July 28, 2025
Dr. Zarnecki always answers all my questions and discusses my blood work results. I am very happy with her care of me regarding my thyroid/parathyroids.
July 24, 2025
Outstanding and caring person
July 24, 2025
Thoughtful, caring and very understanding.
July 17, 2025
Has true concern for patient care
June 22, 2025
Dr. Zarnecki is an outstanding doctor who exceeds all expectations! The combination of her compassion and expertise make us feel lucky to receive her care.
June 21, 2025
Doctor is so hands on and replies to all messages and provides help all of the time.
June 20, 2025
Great
June 12, 2025
Very professional and efficient team. Friendly and knowledgeable. Caring.
June 11, 2025
Dr. Z is terrific
June 10, 2025
Excellent in explaining the thyroid issue and answered all my questions
June 9, 2025
Excellent! One of the best care providers that I've ever worked with.
June 8, 2025
Excellent. Dr. Reviewed imu chart before meeting me. Explained everything clearly. Very pleased.
May 31, 2025
Dr. Zarnecki has been my doctor for two years now and she has been exceptional. I'm always looking forward to see her, she Is very quick with responses for any of my concerns and test results. That Is very Important to me.
May 30, 2025
Attentive, kind, caring
May 30, 2025
She was really-really nice and easy to talk to
May 23, 2025
Dr. Zarnecki is awesome. She is very informative, listens to my questions and concerns, and works with me to come up with a care plan. However, because she is so good, appointments are becoming more difficult to schedule at a good time.
May 20, 2025
Dr. Zarnecki was late and apologized to me. I know this does happen, but it shows consideration for my time, and the apology tells me she cares! She is very knowledgeable, explains things in easily understood language. She takes time to listen and deal with all issues I bring up. She's GREAT !
May 19, 2025
Dr. Zarnecki is an outstanding Endocrinologist with great listening skills; terrific insights; asks a series of probing questions relative to the symptoms I was experiencing; and engages me in a conversation regarding recommended next steps. Highly recommend.
May 14, 2025
Dr. Zarnecki is easy to talk to and very thorough!
May 6, 2025
Dr Zarnecki does a great job on all counts.
May 3, 2025
Dr. Zarnecki was very nice to visit and she was very thorough at explaining my diagnosis. She answered all my questions thoughtfully and kindly.
April 27, 2025
I have been w/ this endocrinologist for several years. She is extremely knowledgeable & we are a good match. I trust her judgement.
April 26, 2025
DR. ZARNECKI IS AMAZING! SHE IS VERY METICULOUS IN HER ENDOCRINOLOGY PRACTICE.
April 25, 2025
She is wonderful and caring doctor!
April 23, 2025
Dr.Zarnecki is one of my top doctors I see. She reviews the patients medications, is very knowledgeable, kind and thorough. I have spoken my praise of Dr.Zarnecki to friends and co workers.
April 22, 2025
Concerned and caring friendly
April 21, 2025
I love that Dr Zarnecki doss care with me, asking my thoughts and taking them into consideration when giving care.
April 15, 2025
Outstanding Provider
April 14, 2025
Dr Z is the best and I couldn't ask for better care.
April 10, 2025
I've been seeing Dr. Zarnecki for several years now and have always admired her professionalism, and her genuine care for my well being. She is very knowledgeable and is able to translate medical terms in lay person's terms.
April 9, 2025
Dr Zarnecki is worth the wait!
April 8, 2025
Love Dr Zarnecki
April 3, 2025
An Excellent doctor. She is very attentive to my needs and has great approach for my concern.
April 2, 2025
Very caring and great listener
April 1, 2025
Love Dr Zarnecki
April 1, 2025
Excellent Doctor
March 20, 2025
Extremely helpful and patient with numerous questions. Dr Zarnecki did not make me feel rushed as many others doctors have in the past
March 19, 2025
Dr.Zarnecki is the best Endo.
March 19, 2025
Excellent
March 17, 2025
Listen to my concerns was very thorough answered all of my questions
March 17, 2025
Really respect Dr. Zarnecki. She has worked to find the correct dosage of my Methimosol, so that my thyroid is functioning smoothly!
March 9, 2025
Dr Zarnecki is awesome. She is the best of the best. A real gem in the Endeavor jewel box.
February 28, 2025
Has done excellent job diagnosing her needs for maintenance of her diabetes
February 27, 2025
Excellent
February 27, 2025
Dr. Zarnecki is outstanding- kind, patient and knowledgeable. Very impressed with her always.
February 26, 2025
Very caring very nice helpful
February 22, 2025
Very helpful
February 21, 2025
Dr. Zarnecki is amazing! She is genuine, transparent and has a very caring and sincere bedside manner. Quality service is very rare these days. When someone is willing to make the extra effort and take the necessary time to thoroughly assess and address an issue it is important to point them out. Dr. Zarnecki is an example of the medical staff you should do everything to support and hold out as a positive example.
February 21, 2025
Dr. Z is a good doctor and I have no issues with her.
February 20, 2025
Very thorough and caring. She takes time to listen and answer all my questions.
February 19, 2025
Always good
February 14, 2025
Thorough; pleasant
February 13, 2025
Comprehensive care in every way!
February 11, 2025
I understand the doctor gets delayed during previous appointments at times but this was the second visit with her where I was sitting in the exam room for over 30 minutes after the nurse took my information and blood pressure. Someone should have informed me of a delay after 10 to 15 minutes.
January 26, 2025
Always willing to answer questions.
January 26, 2025
Very thorough.
January 24, 2025
Dr ZARNECKI never rushes the visit, spends time explaining even drawing to explain and is kind.
January 24, 2025
Dr Zarnecki is very kind and understanding and obviously has a great deal of experience.
January 24, 2025
Dr Zarneki is an excellent doctor, she does a good job of explaining about what is going on with your health and medication's.
January 23, 2025
I've already highly recommended Dr Zarnecki.
January 20, 2025
Covered my concerns and explained them well.
January 18, 2025
Dr. Zarnecki always works with me to see what I want to do with my care. And goes through all the options. I really appreciate that.
January 18, 2025
Very knowledgeable and a good listener. She always has good ideas. She is easy for me to talk with.
January 17, 2025
Dr Zarnecki was very attentive to my needs. I was well informed about my condition and options available.
January 17, 2025
Very caring and took time to answer my concerns.
January 17, 2025
Great doctor and team
January 13, 2025
My trusted doctor
January 11, 2025
Dr. Zarnecki is excellent!
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