Measles Information

Practice Focus Areas

This medical professional has a particular interest or expertise in:

Adult Medicine
Cancer Screening
Cholesterol Management
Chronic Disease Management
Comprehensive Primary Care
Diabetes
Hypertension
Preventive Medicine

Education

Medical Education:: MD, Loyola University Stritch School of Medicine - 1987
Residency:: McGaw Medical Center of Northwestern University - 1990

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

4.9

4.9

2239 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

April 29, 2025

5.0

Good follow up

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April 24, 2025

5.0

Very Likely.

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April 24, 2025

5.0

I have been with Dr Nicolas for almost 30 years. He is a straight shooter and works hard for his patients.

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April 23, 2025

5.0

Dr. Nicolas always takes whatever time is necessary to provide a complete diagnosis and plan of action.

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April 20, 2025

5.0

He has been my doctor for over 15 years he has patient with me he explained everything well for me to understand he's just a outstanding doctor

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April 19, 2025

5.0

He is sincere, a good listener, I appreciate his approach

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April 17, 2025

5.0

He takes his time, really listens & is thorough.

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April 17, 2025

5.0

Caring, thorough, listens and explains

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April 16, 2025

5.0

Very thorough in his examination.

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April 15, 2025

5.0

Thoughtful Thorough

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April 15, 2025

5.0

please see above - Dr John's Attention to detail, his personable nature, sincerity, vast experience and knowledge is always valued !

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April 14, 2025

5.0

Very thorough in his care

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April 14, 2025

5.0

He takes the time to listen and is very thorough.

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April 11, 2025

5.0

He's always professional and very patient.

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April 11, 2025

5.0

Hi is professional.

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April 11, 2025

5.0

Excellent Care!

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April 08, 2025

5.0

Extremely thorough yearly examination. Allow me to ask questions, responding with concise answers. Was given a detailed plan moving forward.

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April 07, 2025

5.0

He is very detailed, compassionate, and thorough! Great doctors!!!!!!

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April 07, 2025

5.0

My Dr. is thorough, professional and proficient. He has all my respect and appreciation. My thanks

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April 02, 2025

5.0

Excellent practitioner

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March 29, 2025

5.0

Competent and knowledgeable doctor. Takes his time with his patients.

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March 28, 2025

5.0

A very caring, thorough Physian!!

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March 27, 2025

5.0

Just happy overall with everything.

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March 26, 2025

5.0

Very talented and thorough

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March 26, 2025

5.0

Dr. Nicolas has the time to listen to his patients and direct their health care.

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March 25, 2025

5.0

He is just a marvelous concerned doctor he knows is saving my life!

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March 24, 2025

5.0

Dr. Nicolas is compassionate and circumspect.

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March 24, 2025

5.0

Thorough, expert, knowledgeable.

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March 23, 2025

5.0

My phone visit succinctly covered all the salient health issues concerning me now. Dr. Nicolas is a good communicator and is always interested in the best outcome. Mittie Parrino

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March 22, 2025

5.0

Dr. Nicolas takes the time to listen, has a genuine concern, & never seems hurried.

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March 19, 2025

5.0

Excellence in everything he does.

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March 18, 2025

5.0

Dr Nicolas cares about his patients and is always concerned about my health. I have actually recommended him to others.

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March 15, 2025

5.0

Dr Nicholas is a wonderful doctor. He was professional, so knowledgeable and really took the time to learn about my medical history. That human quality of really caring for another is special and important for doctors. Dr Nicholas is one who has it and is really concerned about the health and wellness of his patients

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March 11, 2025

5.0

He is the best physician. He's thorough, kind and compassionate. He constantly checks to make sure that I am doing what I can to be healthy.

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March 11, 2025

5.0

He did a thorough job on the exam.

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March 08, 2025

5.0

He's the best. He's thorough, he explains everything he's doing, or what he's suggesting. He's why trek downtown to Northwestern.

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March 07, 2025

5.0

Dr. Nicolas is smart, compassionate and always provides the highest quality care.

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March 05, 2025

5.0

John D.Nicolas, MD lead the discussion mentioned earlier.

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March 04, 2025

5.0

Dr. Nicolas is very professional, know- ledgeable, thorough and efficient. He explains everything clearly when I ask questions

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March 04, 2025

5.0

Good doctor

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March 03, 2025

5.0

He takes as much time to get to know the patient as the patient needs, specially a new patient. It is hard to get to know all the specialists in a big hospital Northwestern but he can guide you to the ones you need and give you referrals to the areas you need to get to.

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February 28, 2025

5.0

Took the time to explain my medical condition.

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February 24, 2025

5.0

He was very thorough

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February 24, 2025

5.0

Very good doctor!

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February 23, 2025

5.0

Very thorough and patient.

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February 22, 2025

5.0

I have been seeing Dr. Nicolas for years and am very satisfied with the care he provides and the relationship we have. He is accessible when needed, keeps up to date on appropriate care and treatments and works well with the other specialists. He takes enough time to do a thorough exam and to listen and respond to concerns and questions.

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February 21, 2025

5.0

He was very professional and detailed in his exam.

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February 20, 2025

5.0

Very patient focused and takes his time to assess the situation and come up with a treatment plan.

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February 20, 2025

5.0

He checked very closely everything

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February 20, 2025

5.0

Is one of the best.

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February 19, 2025

5.0

Very caring and thorough.

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February 17, 2025

5.0

A lot of attention- and knowledgeable

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February 17, 2025

5.0

Very thorough exam & attention; he listens carefully & sends appropriate time.

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February 14, 2025

5.0

Very helpful

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February 14, 2025

5.0

Best ever! Just like family doctors used to be. Everyone I've recommended to Dr. Nicolas has thanked me profusely.

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February 11, 2025

5.0

On time, thorough, practical, and easy to deal with.

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February 11, 2025

5.0

Dr. Nicolas is just wonderful, so attentive and caring.

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February 07, 2025

5.0

Professional knowledge, focus on patient's issues and potential resolutions. Instills confidence.

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February 06, 2025

5.0

For 30 years has been a great primary care physician for both my husband and me!

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February 05, 2025

5.0

Incredibly attentive and detailed doctor, great bedside manner

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February 04, 2025

5.0

knowledgeable, and very respectful.

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February 02, 2025

5.0

I have been a patient of Dr. Nicolas' for better than 30 years. He is a smart, serious, caring physician.

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January 30, 2025

5.0

great confidence in his thorough approach to care

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January 29, 2025

5.0

Follow-up

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January 28, 2025

5.0

he is great in every way - caring, thorough, experienced, clear

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January 27, 2025

5.0

He is thorough in studying my medical history, listening to me and evaluating my present situation and coming to a plan for my future.

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January 24, 2025

5.0

Dr. Nicolas is very pleasant thorough concerned outstanding

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January 16, 2025

5.0

He seems very competent and very thorough.

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January 16, 2025

5.0

He is a great Doctor.

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January 15, 2025

5.0

Outstanding doctor!

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January 14, 2025

5.0

He's the best

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January 13, 2025

5.0

Very thorough exams. Excellent recommendations that are well supported by exam/labs.

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January 13, 2025

5.0

Sensitive, caring Doctor that listens.

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January 13, 2025

5.0

Very thorough and professional, answered all my questions

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January 12, 2025

5.0

Kind compassionate not in a rush helpful caring simply the BEST

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January 11, 2025

5.0

His skill as an internist and patient care

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January 11, 2025

5.0

See above. Dr Nicolas is very thorough & explains as well as he listens

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January 09, 2025

4.0

John Nicolas is a very fine, thorough doctor

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January 09, 2025

5.0

Very professional and attentive

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January 09, 2025

5.0

Knows his business and cares about his patients.

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January 04, 2025

5.0

Engages patient in friendly, caring manner.. He listens to and answers patients concerns.

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January 03, 2025

5.0

Attention to detail

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January 03, 2025

5.0

quality care.

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January 02, 2025

5.0

Takes a lot of time with patient. Seems thoughtful.

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December 31, 2024

5.0

He is a very caring doctor and individual He is very thorough.

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December 31, 2024

5.0

He is my doctor for 4 years and I'm very satisfied.

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December 23, 2024

5.0

Excellent physician

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December 17, 2024

5.0

He is very caring! He takes his time with you to get a good picture of where you've been and where we are going. He includes you in the care planning.

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December 13, 2024

4.0

Thorough check up and good manner.

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December 13, 2024

5.0

Excellent doctor

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December 13, 2024

5.0

He is great Doctor.

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December 12, 2024

5.0

Dr. Nicolas is very thorough and he takes the time to hear me as a patient and explain things in a way I understand,

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December 12, 2024

5.0

He was personable, professional and very helpful

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December 10, 2024

5.0

Dr Nicolas is very thorough, knowledgeable, professional, and always takes time to listen to my concerns as well as my input towards my plan of care.

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December 10, 2024

5.0

Thoroughly reviewed my medical issues.

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December 10, 2024

5.0

Finest Primary Doctor Ive ever experienced. Very comprehensive and professional.

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December 06, 2024

5.0

Personable and knowledgeable. Very thorough

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December 05, 2024

5.0

The best Dr.

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December 05, 2024

5.0

Dr. Nicolas is very thorough and attentive.

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December 03, 2024

5.0

Dr. Nicolas is always very professional, kind, and patient bedside communications is excellent, a very good listener and care about patient care and very patience and understanding and compassionate about care.

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Disclosures

John D. Nicolas, 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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