Jah-Won Koo, MD | Northwestern Medicine

Education

Medical Education:: MD, University of Cincinnati College of Medicine - 1995
Residency:: McGaw Medical Center of Northwestern University - 1998

Board Certifications

American Board of Internal Medicine - Internal Medicine (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:: Northwestern Memorial Hospital

Ratings and Reviews

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Overall Rating

5.0

5.0

1307 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

February 27, 2026

5.0

He is a wonderful dr and he cares I followed home from rish hospital

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February 26, 2026

5.0

Professional, knowledgeable, detailed oriented and very patient. I would highly recommend him as a doctor.

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February 25, 2026

5.0

I feel like the care I receive from Dr. Koo is great. He listens to my concerns addresses them.

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February 23, 2026

5.0

The physician care and interest in health care is without question service that speaks volume that reflects NW reputation standards for Health Care services rendered.

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February 16, 2026

5.0

Top notch

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February 09, 2026

5.0

Been my PCP for 20 years. He is the best.

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February 04, 2026

5.0

Friendly intelligence

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February 03, 2026

5.0

If any patient has complex problems, Dr. Koo will be the best physician to take care of the condition.

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February 02, 2026

5.0

Makes you very comfortable.

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January 24, 2026

5.0

Thorough, excellent listener, knowledgeable.

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January 23, 2026

5.0

I recommend Dr Koo because he's the best at what he does. Excellent primary care physician.

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January 22, 2026

5.0

Great Doctor

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January 20, 2026

5.0

He is an extremely knowledgeable internist.

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January 20, 2026

5.0

He has listening skills and is very caring.

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January 18, 2026

5.0

Dr Koo is a very caring doctor and shows concerns regarding your medical issures.

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January 17, 2026

5.0

Great doctor and would recommend him to anyone that asks.

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January 16, 2026

5.0

A great, caring, and knowledgeable physician.

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January 15, 2026

5.0

Great doctor!

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January 13, 2026

5.0

Dr. Koo is truly concerned about my well being. He is an excellent listener to my concerns and is thorough in his approach.

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January 08, 2026

5.0

Kind and caring, also smart

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January 02, 2026

5.0

Good communicator. Friendly and easy to talk to.

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December 29, 2025

5.0

Too me he is an expert in medicine

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December 28, 2025

5.0

Caring very thoughtful and thorough.

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December 24, 2025

5.0

He's very thorough, carefully explain everything a wonderful doctor

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December 18, 2025

5.0

He is kind, professional and I trust him

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December 15, 2025

5.0

Highly knowledgeable in medical

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December 15, 2025

5.0

Trustworthy, explains his advice.

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December 15, 2025

5.0

Superb care, outstanding communication skills.

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December 10, 2025

5.0

People will appreciate his knowledge and experience.

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December 05, 2025

5.0

Knowledgeable, friendly, and kind.

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December 04, 2025

5.0

Great clinician. Collaborative. He has earned my long term trust.

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December 04, 2025

5.0

Very thorough and very caring

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November 26, 2025

5.0

Dr Koo is very detailed in his examination of his patients. He will also recommend follow-up with other Doctors if he think it's necessary, The conversations are very engaged with information to improve your long term health. His follow-up on procedures for your health related issues is 100% on target,

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November 24, 2025

5.0

Patient care, inclusion of patient in medical care and concern. A listener of the interest of his patients. The level of professionalism (impeccable) is a great asset to NW Medical/ University.

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November 24, 2025

5.0

He is detailed oriented and always keeps the patient concerns as a primary focus on reaching the best medical outcome.

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November 22, 2025

5.0

He listen to you he actually cares great doctor.

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November 17, 2025

5.0

I will confident with his knowledge and advice.

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November 17, 2025

5.0

Thorough, smart, considerate care

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November 08, 2025

5.0

Dr. Koo is the best doctor I've met in the U.S. He is exceptionally knowledgeable in his field and has an outstanding bedside manner. He genuinely cares about his patients and always goes above and beyond to support his patients.

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November 04, 2025

5.0

He is a great person and doctor

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November 02, 2025

5.0

Dr. Koo is great _ always highly personable, thorough and patient. He always listens attentively and answers questions completely. His explanations are always well thought out, detailed, and easy to understand. His advice is always spot on. I am lucky to be in his care.

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November 02, 2025

5.0

Dr.Koo is a very compassionate caring doctor. He is an excellent physician with a very good bedside manner, He makes you feel like you are a very important person, and gives you the best possible care. He takes the time to answer your questions and explain any needed procedures, When the test results are available he sends a note to explain them to you. The technicians are also very efficient.

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November 01, 2025

5.0

Dr Koo listens to the patient. He is patient, caring & thorough.

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October 31, 2025

5.0

Great Doc - explains treatments/options so you can understand them.

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October 25, 2025

5.0

Detailed, Caring, great listener, patient focused

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October 24, 2025

5.0

Professional, caring, attentive

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October 17, 2025

5.0

Very attentive and responsive to needs, good with follow up

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October 17, 2025

5.0

He's the best , the very best , I know a good provider

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October 17, 2025

5.0

Dr. Koo was very nice and asked how I was feeling and listened to my concerns

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October 10, 2025

5.0

Great bedside manner. Very collaborative care approach.

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September 30, 2025

5.0

He is very attentive. I never feel ignored or rushed.

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September 23, 2025

5.0

Dr Koo is proactive, thorough, knowledgeable and caring. He's the best!

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September 21, 2025

5.0

Dr. Koo is the best doctor I've ever had

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September 20, 2025

5.0

Excellent

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September 19, 2025

5.0

He is a great doctor, very professional and cares about his patients.

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September 17, 2025

5.0

He's a great physician. He is no judgmental and provides fantastic medical care. He is very knowledgeable.

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September 16, 2025

5.0

He is thorough, listens carefully.

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September 16, 2025

5.0

Totally satisfied with his card

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September 16, 2025

5.0

Attention to care and details of concern

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September 15, 2025

5.0

Extremely knowledgeable and he explains things well.

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September 12, 2025

5.0

Great bedside manner

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September 12, 2025

5.0

good doctor he listens and not pushy,

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August 25, 2025

5.0

He doesn't excellent job of communicating and listening to me. He takes my concerns seriously and we talk through the issues thoroughly.

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August 24, 2025

5.0

No question about recommending Dr. Koo who wants to have an internist / family doctor for the future care.

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August 22, 2025

5.0

A great physician with a great reputation for caring.

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August 13, 2025

5.0

Organized, great listener, knowledgeable,

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August 12, 2025

5.0

Very knowledgeable and personable.

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August 12, 2025

5.0

Excellent patient care.

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August 07, 2025

5.0

Cares about my health and provides options for keeping me healthy

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August 05, 2025

5.0

Provides great comprehensive care.

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August 04, 2025

5.0

Intelligent, smart, knows his medicine

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August 04, 2025

5.0

Dr Koo is a caring, patient physician. I really appreciate his apparent concern for me.

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July 29, 2025

5.0

I'm happy with the level of care I receive from Dr. Koo

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July 29, 2025

5.0

He is thorough, informative, and professional.

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July 27, 2025

5.0

I have been a patient with Dr. Jah Won Koo for about 25 years! He knows me and my family and has always been spot on with our health.

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July 22, 2025

5.0

He's the absolute best.

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July 20, 2025

5.0

Knowledgeable, professional, kind, takes his time during appointments-not rushed

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July 17, 2025

5.0

Excellent physician.

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June 28, 2025

5.0

very knowleddgable

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June 28, 2025

5.0

Through, caring and excellent

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June 27, 2025

5.0

Dr. Koo is an excellent physician and cares about the wellbeing of the patient

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June 23, 2025

5.0

See remarks above. In addition, I always feel heard per my health concerns during my appointments with him. He is respectful_never condescending or dismissive.,

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June 21, 2025

5.0

I have a repore of Physician care with Dr. Koo that I admire and appreciate. The interest and concern that he has given me in my health care in my life journey is a treasure and great value to me.

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June 17, 2025

5.0

An excellent internist.

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June 17, 2025

5.0

I'm a dentist and Dr Koo is one of the very best MD that has treated me

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June 17, 2025

5.0

Dr Koo listens to my concerns and give me clear and concise information

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June 14, 2025

1.0

Dr. Koo is caring and listens to me as the patient. Genuine.

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June 12, 2025

5.0

Very confident of the expertise of my PCP, very attentive to my concerns

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June 10, 2025

5.0

GREAT DOCTOR VERY CARING

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June 09, 2025

5.0

Exceeds expectations

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June 08, 2025

5.0

Dr Koo administered a very thorough test, and allowed me adequate time to address all questions that I had

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June 06, 2025

5.0

Dr Koo is a very thorough Competent physician

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May 27, 2025

5.0

Exemplifies professionalism and interest in his patients and their overall well being!

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May 21, 2025

5.0

Listens well, offers excellent professional options, friendly, concerned.

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May 20, 2025

5.0

Dr Koo listens to my concerns and is always available if I have questions

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May 19, 2025

5.0

I have been under his care for thirty years l. He is a caring professional and treats me with respect.

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May 16, 2025

5.0

Dr. Koo is very informative and reasonable.

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May 13, 2025

5.0

Dr Koo is professional, caring and makes you feel important. He explains to you what is going on and makes you feel like you are in the best hands.

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May 05, 2025

5.0

Again, as stated the one-on-one care, involving the patient in care of administering knowledge with the needed service is exceptional.

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May 05, 2025

5.0

Very thorough

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Disclosures

Jah-Won Koo, 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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