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Mary Ahn, MD

4.9

956 ratings Read Reviews

Northwestern Medical Group

Primary Specialty

Breast Surgery

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Practice Focus Areas

This medical professional has a particular interest or expertise in:

Breast Cancer in Men
Breast Cancer in Pregnant Women
Breast Cancer in Young Women
High Risk Breast Disease and Risk Assessment
Image Guided Breast Biopsy
Mastectomy, Nipple Sparing
Partial Mastectomy
Sentinel Lymph Node Biopsy

Education

Medical Education:: MD, Loyola University Stritch School of Medicine - 1995
Residency:: Loyola University Medical Center - 2000
Fellowships:: Cleveland Clinic Foundation - 2001

Board Certifications

American Board of Surgery - Surgery (Certified)

Faculty Profile

Clinical Assistant Professor, Feinberg School of Medicine

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Practice Groups and Affiliations

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

Delnor Hospital

Ratings and Reviews

At Northwestern Medicine, our patient’s feedback is important to us. While different care providers have their own unique strengths, we strive to be as transparent as possible with our quality of care.

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Overall Rating

4.9

4.9

956 Ratings

Reviews from Patients

67 Reviews

Reviews from Patients

67 Reviews

February 20, 2026

5.0

I liked her success rate for margin free surgery. I added to her success tally.

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February 15, 2026

5.0

She explained my treatment plan thoroughly. I had a whole sheet with graphs and statistics. I walked out of her office with all my questions answered and I felt confident that I selected an experienced and expert oncologist. Such a new diagnosis for me not very much time to shop or second opinions. However, from the beginning of my appointment, she got into the process of how my cancer grew and how to attack it.

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February 13, 2026

5.0

Caring and professional

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February 12, 2026

5.0

Dr. Ahn is very knowledgeable and I wouldn't want anyone else working on me.

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February 12, 2026

5.0

Dr Ahn carefully considered past history and recent changes in making decisions. Dr Ahn is also communicating with my oncologist to use best judgment in my care.

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January 30, 2026

5.0

She bright, direct & gives clear answers.

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January 25, 2026

5.0

I trust her I have faith in her. I know she would take good care of me and she knows what she's doing.

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January 23, 2026

5.0

Dr Ahn explains everything to you.

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January 16, 2026

5.0

Dr. Ahn was very reassuring, emphasizing a positive outcome.

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January 12, 2026

5.0

Dr Ahn is so very professional yet makes you feel at ease.

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January 08, 2026

5.0

Very smart doctor and caring

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January 07, 2026

5.0

Explained precisely procedures

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January 04, 2026

5.0

Dr Ahn is very knowledgeable and caring. She always spends a lot of time with me.

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December 27, 2025

5.0

Fantastic surgeon and very knowledgeable and thorough doctor.

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December 24, 2025

5.0

Dr. Ahn was amazing. She preformed surgery on me and I couldn't be happier with the results.

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December 24, 2025

5.0

I love the fact that she's very attentive to my needs. She listens and doesn't talk over me, but talks to me. She made my journey very peaceful and knowledgeable. She shows that she cares and makes you feel that you matter.

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December 13, 2025

5.0

Knowledgeable, informative, understanding care. Experienced professional.

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December 12, 2025

5.0

Thorough, compassionate, patient beyond belief with my questions...far and away the best!

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December 09, 2025

5.0

Dr Ahn presented options with the truth around expected outcomes and risks and answered my questions in terminology I could understand. She didn't judge the personal decisions I made regarding my situation. The work Dr. Ahn performed achieved successful results.

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December 09, 2025

5.0

Extremely knowledgeable and gifted and understanding.

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December 02, 2025

5.0

Dr. Ahn took her time to explain in detail all of my options and never made me feel rushed. She answered any questions that we had on our level and made us feel very comfortable.

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November 24, 2025

5.0

She is an excellent doctor and person

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November 23, 2025

5.0

She's fantastic: caring, patient, knowledgeable

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November 21, 2025

5.0

She's the best.

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November 21, 2025

5.0

Dr. Ahn is a powerhouse of knowledge and has an excellent bedside manner. I felt so secure in her care. She is simply a wonderful surgeon and I'm thankful she was able to walk with me through my breast cancer.

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November 19, 2025

5.0

Same as above. She seems like she knows everything possible about breast cancer. She just lacks a bedside manner and any kind of empathy. She tells you like it is that's it. You cannot interrupt or she gives you these big eyes like she wants you to be quiet. I don't like that about her at all. She kind of scares you. She makes you not wanna talk. But I would rather have the expertise in healing my cancer than someone who could be talkative, nice and sweet and be a lousy surgeon.

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November 14, 2025

5.0

I felt like she had my best interest at heart when she pushed to get my surgery scheduled sooner rather than later. She has excellent credentials and reviews, and lived up to all my expectations!

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November 14, 2025

5.0

Good doctor. To the point.

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November 11, 2025

5.0

My surgery went well. An extremely caring physician/surgeon.

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November 07, 2025

5.0

She was very knowledgeable and respectful of my feelings

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November 01, 2025

5.0

Her demeanor made me feel very comfortable and confident in her ability to help me with my treatment.

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October 22, 2025

5.0

She is personable and answers all my questions.

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October 22, 2025

5.0

She was very direct and explained everything

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October 21, 2025

5.0

Very kind & Professional

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October 10, 2025

5.0

I really felt she would do her best to take great care of me. She had great knowledge of my situation and various procedural steps/options.

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October 09, 2025

5.0

Wonderful personality.

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October 09, 2025

5.0

She is very kind and efficient.

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September 19, 2025

5.0

She took the time to listen to my history, review the records, examine me, and meet me and my husband in a conference room to review the results and formulate a plan of care without us feeling rushed or overwhelmed. She allowed time for questions.

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September 19, 2025

5.0

She is the BEST! Dr. Ahn is knowledgable, professional, and good-humored. I am so fortunate to have had her perform my surgery.

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September 16, 2025

5.0

Informative and thorough assessment .

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August 31, 2025

5.0

She was very informative and presented complex information clearly. I appreciated her expertise and her ability to answer all my questions and defer to other specialists where appropriate.

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August 29, 2025

5.0

She took the time to explain the process and how she would do the work.

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August 19, 2025

5.0

Dr ahn took time with explanations

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August 07, 2025

5.0

She's direct but in a compassionate way

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August 01, 2025

5.0

Dr. Ahn was confident to treat me when I had breast cancer where I had no breast after completing chemo.

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August 01, 2025

5.0

Excellent doctor

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August 01, 2025

4.0

I can trust her.

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August 01, 2025

5.0

Smart, Caring, thorough, takes the time and relieved my anxiety

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July 15, 2025

5.0

Very patient and thorough. Takes her time to make sure you understand everything and reassure you will be fine.

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July 15, 2025

4.0

Dr. Ahn is very knowledgeable and explained results and procedure very well.

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July 02, 2025

5.0

Very knowledgeable and compassionate. Made me feel confident I'm getting the best care

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June 27, 2025

5.0

She is down-to-earth, helpful and put my fears at ease.

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June 24, 2025

5.0

She is amazing

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June 11, 2025

5.0

She is very good at what she does. I am grateful and fortunate.

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June 10, 2025

5.0

Dr Ahn is the best. She listens and explains everything so you totally understand.

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June 10, 2025

5.0

Knowledgeable, kind and caring

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June 06, 2025

5.0

Dr. Ahn's manner is direct but with care...explains all procedures, answering my questions and concerns.

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June 06, 2025

5.0

She thoroughly examined me, and clearly explained the next steps of monitoring my breast cancer prognosis for the remainder of this year, and the next 2 years. I felt very comfortable with her.

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May 29, 2025

5.0

Dr Ahn takes her time and explains things. Very caring

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May 27, 2025

5.0

Very thoughtful and thorough explanation of procedure. Also a very skilled surgeon.

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May 24, 2025

5.0

Caring and efficient doctor. Really knows her stuff and helps me make informed decisions.

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May 20, 2025

4.0

She seemed thorough & covered all the bases.

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May 14, 2025

5.0

Knowledgeable, thorough in explanations, willing to go over details more than one time and welcomed any questions from myself or family members.

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May 12, 2025

5.0

Explained everything thoroughly and was very kind.

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May 09, 2025

5.0

Dr. Ahn is very thorough, explained the findings and the next steps.

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May 07, 2025

5.0

She did an amazing job and I felt comfortable talking options and making decisions under her care.

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May 07, 2025

5.0

She is wonderful

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Disclosures

Mary Ahn, MD reported no external professional relationships for calendar year 2024.

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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More HealthBeat Articles