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Education

Medical Education:: MD, Icahn School of Medicine at Mount Sinai - 1984
Residency:: McGaw Medical Center of Northwestern University - 1987

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

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

2124 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

February 24, 2026

5.0

Dr. Gary Gruber is the best. Very polite, knowledgeable, understandable, and very concern about the well being of his patients. He listen to your concern and refer you the proper Specialists for the best care.

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February 24, 2026

5.0

Stated reason above. Dr. Gruber is very caring about ones well being.

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February 21, 2026

5.0

Listens to patient. Knowledgeable and pleasant. Responsive to requests for assistance.

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February 19, 2026

5.0

Dr. Gruber is fast, efficient and friendly, not to mention a wealth of knowledge and consistent.

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February 19, 2026

5.0

good manner, knowledgeable and thorough

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February 17, 2026

5.0

I have 23 years of positive experience to support my opinion that Dr. Gruber is an outstanding physician who I recommend without any reservations.

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February 16, 2026

5.0

He's the best

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February 13, 2026

5.0

I trust him

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February 12, 2026

5.0

With Dr. Gruber for 25 years and trust him explicitly. He is an excellent doctor and follows through on any problems that arise.

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February 12, 2026

5.0

Outstanding internist, friendly interaction, through examination and discussion, no rushing but relaxed interaction

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February 10, 2026

5.0

Excellent patient care

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February 06, 2026

5.0

Knowledgeable, Caring, Thorough, Takes the time needed to explore and explain things

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February 05, 2026

5.0

Dr Gruber takes time with me. He shows genuine concern for my health and well being. I don't feel rushed and pushed through to get to the next patient. He listens and is great at responding. Perfect example during my visit today he knew I needed hip surgery so after his examination of my feet he put my shoes back on so I wouldn't have to be in pain. That's the type of care that is above and beyond!

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February 04, 2026

5.0

Dr Gruber treats his patients as if they were his own family in my opinion; he is an excellent diagnostician and is proactive.

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February 03, 2026

4.0

I believe he is a caring physician. I've referred others to him

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February 02, 2026

5.0

His attention to detail and patience as we documented all my personal and family heath history.

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January 31, 2026

5.0

Open and straightforward.

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January 29, 2026

5.0

Same reason as above. He's a very friendly, knowledgeable, and caring man. Explains everything to me that he cares about, and that I care about.

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January 26, 2026

5.0

As mentioned previously: Dr. Gruber spent a lot of time reviewing and discussing. My medical history, as well as discussing some current medial issues I'm having and what to do about them.

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January 26, 2026

5.0

Same doc since 1989...he's great

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January 25, 2026

5.0

~ 46 year relationship with Dr. Gruber. He gives diagnosis & advice and leaves the final decision to me.

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January 21, 2026

5.0

Easy to talk to and very thorough

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January 20, 2026

5.0

Caring and efficient

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January 19, 2026

5.0

Dr. Gruber takes the time to listen carefully and respond thoughtfully to my concerns about my health

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January 19, 2026

5.0

Detailed, thorough and informative

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January 18, 2026

5.0

Dr. Gruber is the best: a careful, knowledgeable physician who is always thorough. He has clearly improved my overall health!

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January 17, 2026

5.0

Dr, Gruber has been my PCP for over three decades. Not only is he a highly competent and thoroughly responsive physician, he is also a compassionate human being who takes time to know and understand a patient's life beyond physical well being and symptoms to assess emotional, relationship, societal and lifestyle/lifecycle impacts on one's health. He is the best!

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January 17, 2026

5.0

Doctor Gruber goes on and above the best in nw

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January 16, 2026

5.0

Great doctor. Very thorough.

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January 15, 2026

5.0

He's very thorough, patient and knowledgeable.

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January 14, 2026

5.0

I've been seeing him for 15 years...he's great!

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January 13, 2026

5.0

Dr was punctual and very kind.

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January 13, 2026

5.0

Dr. Gruber is so knowledgeable and makes effective analysis of my diverse symptoms.

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January 08, 2026

5.0

He is excellent

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January 08, 2026

5.0

He is a very good Dr. and very interested in my well being.

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January 07, 2026

5.0

He is very thorough, asks a lot of questions and takes the time to listen and find solutions

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January 06, 2026

5.0

I absolutely adore Dr Gruber. He's an amazing doctor. I look forward to my visits.

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January 02, 2026

5.0

Excellent and thorough he's the best

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December 29, 2025

5.0

Dr Gruber is the most therow Dr I have ever been with . Asks lots of questions today he looked into my whole 2025 of Dr visits with other Dr s he is the best of the best .

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December 26, 2025

5.0

Doctor Gruber is thorough and very informative while also sensitive to patients time. His ability to dialogue allows for patients to thoughtfully consider all options for any medical decisions that need to be addressed.

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December 24, 2025

5.0

Makes you fell like you're the only patient during the short visit.

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December 22, 2025

5.0

Dr Gruber is a wonderful clinician and physician . He is through in his examination and diagnosis also goes above and beyond in patient care .

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December 16, 2025

5.0

The best

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December 13, 2025

5.0

Dr Gruber examine you thoroughly not in a hurry,he pay close attention to small things,being very careful and precise.

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December 10, 2025

5.0

Knowledge of the provider

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December 09, 2025

5.0

Attentive and genuinely concerned about my health and well being

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December 09, 2025

5.0

Very through doctor

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December 08, 2025

5.0

Please see the above. I feel like he is an excellent physician.

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December 05, 2025

5.0

He is a no nonsense doctor

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December 05, 2025

5.0

Because he is a wonderful, very caring, and intelligent doctor. I actually enjoy going to our appointments.

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December 04, 2025

5.0

Dr Gruber is an outstanding doctor. Efficient and competent. Compassionate and good communication. Very detailed analysis and excellent health care. Helpful and personable.

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December 02, 2025

5.0

Caring, communicative, proactive

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December 01, 2025

5.0

He is a caring excellent diagnostician who cares about his patients.

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December 01, 2025

5.0

I stated above Dr. Gruber is very caring thorough takes the time to talk to you to make sure everything is OK and thoroughly goes over all the medical records

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November 26, 2025

5.0

Excellent diagnostician Wholistic approach Really cares about his patients' overall health

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November 25, 2025

5.0

Dr. Gruber listens to me and answers my questions. I never have the feeling that he has no time for me.

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November 24, 2025

5.0

He has taken good care of me for nearly 30 years.

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November 20, 2025

5.0

Dr. gruber is an excellent internist. He is detailed, and takes as much time as necessary to treat his patients.

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November 20, 2025

5.0

Dr. Gruber has helped me a lot throughout the years. He is a fantastic doctor.

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November 17, 2025

5.0

Eminently qualified and excellent treatment

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November 14, 2025

5.0

He's a superb diagnostician. I have recommended him to others and they were very satisfied with the care they received.

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November 13, 2025

5.0

Excellent clinician, very thorough

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November 12, 2025

5.0

He has been my primary care physician for over 35 years and has taken great care of me

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November 11, 2025

5.0

Been seeing Dr. Gruber for some time now...and he's just damn AWESOME!! Very patient, vastly knowledgeable, and willing to work with the patient with options. I'm always anxious to go to doctors, medical buildings, etc....but Dr. Gruber always make me feel welcomed and goes beyond to be extra patient & understanding with me.

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November 09, 2025

5.0

Outstanding and thorough Doctor

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November 04, 2025

5.0

Dr Gruber is very thorough and knowledgeable

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November 04, 2025

5.0

Dr. Gruber is a lifesaver. He is a compassionate person. He loves his patience and he cares for each and every one of them black white Asian Hispanic. It doesn't matter for him patience our patience and they need care and he is there to provide it for them to the best of his ability. He's the greatest.

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October 31, 2025

5.0

Excellent, thorough, and provides recommendations if needed.

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October 31, 2025

5.0

I feel my health issues all are addressed with Dr. Gruber.

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October 27, 2025

5.0

he listens and is very through

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October 26, 2025

5.0

Very knowledgeable

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October 21, 2025

5.0

A year ago it was Dr Gruber who detected my heart problem. He is always thorough and follows up on test results. Pleasant during visits.

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October 20, 2025

5.0

He gives you a very clear explanation to all test results and give proper doctor referral for specific symptoms.

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October 20, 2025

5.0

He treats his patients as if they were family members. Has your good health as primary goal.

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October 16, 2025

5.0

He is extremely caring about me as his patient!

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October 16, 2025

5.0

Excellent physician. Very thorough, thoughtful and knowledgeable. Listens and converses well with me.

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October 14, 2025

5.0

Knowledge Caring Shows interest in what patient is saying.

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October 13, 2025

5.0

Patient and caring with his patients

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October 12, 2025

5.0

He is patient listens analyzes all possibilities for your symptoms and provides comfort for those of us who are anxious being in the medical world. He appears to be very caring. Plain and simple I like his demeanor.

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October 11, 2025

5.0

Dr. Gruber cares about his patient's health and is a good doctor.

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October 08, 2025

5.0

No complaints, has done me well

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October 07, 2025

5.0

Dr. Gruber has been my doctor for many years. He knows me and gives me good care. He is conscientious and thorough.

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October 07, 2025

5.0

Dr Gruber is the best doctor I have ever had I am very grateful to have him as my primary gp

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October 07, 2025

5.0

He cares

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October 06, 2025

5.0

He cares and is very detailed regarding your health. He also listens to your concerns.

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October 04, 2025

5.0

he looks at your history and spends time to really know the issues for better health

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October 03, 2025

5.0

He is extremely thorough, listens carefully, follows up on everything.

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October 01, 2025

5.0

Dr. Gruber is a very caring and excellent physician.

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September 26, 2025

5.0

Good interpersonal skills. Knowledgeable doctor.

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September 26, 2025

5.0

Great doctor

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September 25, 2025

5.0

Dr. Gruber is knowledgeable, thorough, highly skilled and talented and obviously committed to keeping up to date on latest treatments etc. Yet even with all that expertise, Dr. Gruber is always willing to listen to my thoughts related to my care and my health.

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September 25, 2025

5.0

Experienced, knowledgeable, and friendly doctor with great bedside manner

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September 23, 2025

5.0

Dr. Gruber is patient and professional. He ask about my health experience and concerns since my last visit.

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September 19, 2025

5.0

Wonderful, compassionate doctor, really listens, supports

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September 18, 2025

5.0

all good

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September 18, 2025

5.0

I'm Gary's longest-tenured patient. Thirty-eight years.

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September 13, 2025

5.0

Dr Gruber is attentive, thorough and professional.

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September 11, 2025

5.0

He has been my primary care physician for over 20 years. He is very good, and easy to talk to.

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September 11, 2025

5.0

would give him a higher than 10 score if possible. He is very thorough, takes time with me and includes me in all decisions.

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September 10, 2025

5.0

I've been under Dr. Gruber's care for many years. He has taken very good care of me. He listens to my concerns and is thorough in assessing my health care needs.

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Disclosures

Gary H. Gruber, 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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