Mark W. Stolar, MD | Northwestern Medicine

Practice Focus Areas

This medical professional has a particular interest or expertise in:

Adult Medicine
Bone Health
Diabetes
Men's Health
Osteoporosis

Education

Medical Education:: MD, University of Illinois at Chicago College of Medicine - 1979
Residency:: Advocate Health Care (Advocate Lutheran General Hospital) - 1982
Fellowships:: McGaw Medical Center of Northwestern University - 1984

Board Certifications

American Board of Internal Medicine - Endocrinology, Diabetes & Metabolism (Certified)
American Board of Internal Medicine - Internal Medicine (Certified)

Faculty Profile

Clinical Associate Professor, Feinberg School of Medicine

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Practice Groups and Affiliations

Medical Group:: Northwestern Medicine Regional Medical Group
Alignment Category:: Northwestern Medicine Physician Network
On Medical Staff At:: Northwestern McHenry Huntley & Woodstock Hospitals

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

5.0

5.0

1901 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

February 27, 2026

5.0

Expert, sensitive

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February 25, 2026

5.0

Dr Stolar always takes time to listen to my concerns and address them

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February 20, 2026

5.0

Dr. Stolar is the kind of doctor you find and follow. He really listens to your concerns, is patient, kind, and cares about what happens to you. He will find the best treatment solutions and treats you like you understand your own body.

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February 17, 2026

5.0

Knowledgable and professional

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February 13, 2026

5.0

Dr Stolar always takes the tome to listen and is very engaged with his patient.

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February 09, 2026

5.0

Outstanding doctor that takes his time addressing any questions & concerns you may have. Has always given me great specialist referrals.

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February 05, 2026

5.0

He is best of show

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February 02, 2026

5.0

Dr. Mark Stolar is an amazing doctor. He is tops in everything.

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February 01, 2026

5.0

Dr Stolar is an extraordinary physician. He is competent and compassionate. I am blessed to be under his care.

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January 26, 2026

5.0

So much experience. Always on the mark. I travel from chicago to mchenry county for my physical every year because I don't want any other doctor

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January 24, 2026

5.0

He has been our doctor for 40 years

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January 23, 2026

5.0

We love Dr Stolar. He is an amazing doctor, best of the best!

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January 21, 2026

5.0

I was referred to Dr Stolar by my wife who is a patient. So far seems like good choice.

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January 19, 2026

5.0

Smart dr no s what he doing

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January 18, 2026

5.0

Personalized and thoughtful

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January 18, 2026

5.0

He's the man. On time, great advice, he has seen it all, responds quickly in the portal. Awesome doctor

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January 18, 2026

5.0

Dr. Stolar's knowledge and dedication has been a true gift in my ongoing medical care.

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January 17, 2026

5.0

Have been with him for so long, he knows my medical issues better than anyone.

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January 15, 2026

5.0

Awesome physician

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January 13, 2026

5.0

Best physician: up to date on new data, clinical skills are amazing, efficient, personable, approachable

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January 13, 2026

5.0

Excellent disposition/ thoughtful in approach. Mark doesn't hold back his views, but his patient interaction and approach is outstanding. He has vast experience and knowledge and he brings it to the table. He seems to know a lot about everything.

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January 13, 2026

5.0

He has always taken excellent care of us. He is always on time, professional & always recommends what is best for us.

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January 13, 2026

5.0

He's the best doctor I've had, always listening and providing great feedback

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January 12, 2026

5.0

Outstanding physician, been with him for 25+ years

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January 08, 2026

5.0

Simply the best care for me (32 yrs) and my family.

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January 07, 2026

5.0

He's the best!

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January 06, 2026

5.0

Competence and understanding

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December 24, 2025

5.0

He cares and listens. Been seeing him for 25+ years!

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December 17, 2025

5.0

Took extra care to explain ther issues that I came in with.

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December 16, 2025

5.0

Professional, very thorough,explains in detail his recommendations,compassionate

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December 14, 2025

5.0

He's very caring and thorough. Dr. Stolar is the BEST.

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December 07, 2025

5.0

Dr. Stolar been by doctor for about 29 years. I feel I get the best healthcare from him.

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December 06, 2025

5.0

He's a remarkable partner in health. Trustworthy, smart, current. His team is great and it's clear they all work well together.

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December 05, 2025

5.0

Dr. Stolar provides comprehensive primary care and is kind, empathetic, and extremely competent.

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December 03, 2025

5.0

Dr. Stolar goes above and beyond giving his undivided attention and providing exceptional care.

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December 02, 2025

5.0

Knowledgeable and responsive

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December 02, 2025

5.0

The best diagnostician around.

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November 28, 2025

5.0

I can say enough about Dr. Stolar. He always listen, which is very important. That's why he been my doctor over 20 years.

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November 26, 2025

5.0

He is the best. Makes you comfortable. Makes you human by recalling specific items from prior visits.

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November 24, 2025

5.0

He is a good listener and looks at the whole patient. He has kept me (and my family) in good health for years.

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November 23, 2025

5.0

He listens carefully and understands my concerns.

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November 22, 2025

5.0

Truly an excellent physician.

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November 20, 2025

5.0

Great bedside manner, great diagnostican, and has a great knowledge of meds. Could not ask for more.

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November 19, 2025

5.0

He is very thorough and expierenced

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November 17, 2025

5.0

I have been seeing dr stolar over 35 yrs. He is a very patient and attentive dr. Explains everything. I leave my nervousness in the parking lot when I visit.

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November 14, 2025

5.0

Have been a patient of his for years. He is always professional and makes going to the doctor a lot less stressful.

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November 14, 2025

5.0

Great Dr. easy to talk to. Very knowledgeable.

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November 14, 2025

5.0

Dr Stolar pays attention to your health needs and gives you attainable goals for your health.

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November 13, 2025

5.0

Excellent doctor

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November 12, 2025

5.0

Dr STOLAR is the best of the "bestest"....no one can match him. He communicates in the way that is understood, excellent-excellent knowledgeable doctor.

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November 06, 2025

5.0

Very nice, good doctor, approachable

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November 05, 2025

5.0

Very caring and listens well. Always quick to respond to messages. I trust him.

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November 03, 2025

5.0

He is very thorough, and caring.

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November 03, 2025

5.0

Dr. Stolar is an excellent physician. He listens carefully and responds to your questions and concerns.

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November 01, 2025

5.0

Great doctor, great bedside manner

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October 28, 2025

5.0

Dr. Stolar for my root issues right away and tested properly to find it. Hes a very caring and listens to his patients, understands and doesn't rush through his visits.

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October 21, 2025

5.0

He is an excellent doctor!

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October 21, 2025

5.0

He has been our Doctor for over 40 years, best doctor ever.

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October 15, 2025

5.0

Dr Stolar has been my doctor for 30+ years. I drive over an hour to see him. I figure that speaks for itself!

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October 14, 2025

5.0

Dr. Stolar has a wonderful bedside manner, is extremely knowledgeable, and explains everything to us.

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October 14, 2025

5.0

Dr. Stolar has been my physician for more than 30 hrs. I have total trust in him!

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October 13, 2025

5.0

Remembers the patient and asks appropriate questions.

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October 12, 2025

5.0

Perfect match for us for our health needs

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October 10, 2025

5.0

Dr. Mark Stolar is the absolute best physician. I have seen him as my primary care physician for over 30 years nd he continues to provide excellent care. He listens well, responds appropriately, remembers me and my health concerns and always provides an explanation and a plan going forward. There is no one better than Dr. Stolar.

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October 06, 2025

5.0

He is very thorough and takes his time to listen to every detail. I never feel rushed.

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September 30, 2025

5.0

Professional, experienced, knowledgeable, excellent medical care

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September 29, 2025

5.0

As my primary care physician for over 30 plus years, I have received nothing but quality care all these years. Extremely grateful for everything he's done for me.

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September 26, 2025

5.0

Listens to the patient and doesn't treat from a checklist

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September 23, 2025

5.0

Dr Stolar is intelligent, caring and his medical skills are top notch. I also appreciate that he is always on time.

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September 23, 2025

5.0

Dr. Stolar's care is exceptional. he is a very kind and caring.

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September 16, 2025

5.0

Experienced, knowledgeable, "down to earth" and compassionate.

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September 13, 2025

5.0

Best doc I've ever had!

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September 11, 2025

5.0

Dr. Stolar has been my primary contact at Northwestern for decades. I trust him to be thorough and competent. He has a very pleasant manner and is a very good listener.

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September 10, 2025

5.0

I love Dr Stolar as my primary doctor. I don't like changing for no reason at all.

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September 09, 2025

5.0

Dr Stolar is the best!

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September 09, 2025

5.0

Amazing doctor who gives outstanding care and attentive to his patients needs. Dr. Stolar is absolutely wonderful in diagnosing any health issues you tell him you're having. He goes above & beyond at all times.

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September 07, 2025

5.0

Dr Stolar has been my doctor for many years. I travel an hour to see him. I could find a good doctor much closer but not one who knows me as well and provides the care that he does.

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September 05, 2025

5.0

Nice, smart, listens, takes his time, explains everything and most importantly knows who I am

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September 05, 2025

5.0

He is the best in his field. There is nothing that beats his effortless abilities.

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September 03, 2025

5.0

Great Dr. professional and knowledgeable and listens to your needs and asks questions and gives advise

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September 02, 2025

5.0

Detail oriented , quick responses to online questions, skilled physician on on many levels and topics,

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August 29, 2025

5.0

He's a great physician

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August 29, 2025

5.0

He's everything you would want in an internist.

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August 27, 2025

5.0

Dr.Stolar is very thorough, and knowledgeable

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August 24, 2025

5.0

Great doctor

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August 22, 2025

5.0

He truly listen, take time to explain everything clearly, and make me feel cared for. Their professionalism, compassion, and attention to detail give me complete confidence in my care.

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August 19, 2025

5.0

Dr. Stolar is the embodiment of what a great doctor should be. Kind, always explaining medications in detail, and answers every question asked.

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August 18, 2025

5.0

Dr. Mark Stolar is brilliant & caring. A rare talent.

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August 17, 2025

5.0

I drive 90 minutes to 2 hrs to see him for my medical care. He is exceptionally detailed, bright and keeps up on health care as it rapidly changes.

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August 17, 2025

5.0

Doctor Mark Stolar is an incredible doctor who listens to his patient and has an outstanding breath and depth of medical knowledge.

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August 13, 2025

5.0

Best doctor I've had

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August 10, 2025

5.0

Caring, knowledgeable, pragmatic.... I could go on and on. 30 year relationship

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August 08, 2025

5.0

He provides professional care: -asks pertinent health questions, a good listener and observer, and, excellent follow-up.

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August 08, 2025

5.0

Dr. Stolar is very professional, knowledgeable, and caring about any concerns I have. I have been a patient of his for many, many years!!

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August 06, 2025

5.0

He always makes you feel like he's concerned about your health and wants the best care for you

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August 06, 2025

5.0

Dr. Stolar looks and cares about the TOTAL health of his patients, not just the physical but the emotional healthy, as well. Which means he focuses on their overall well-being

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August 02, 2025

5.0

He is thorough and provdes thoughtful and sage advice

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August 01, 2025

5.0

Verry personal and professional. I never had any issues with any aspect of anything.

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August 01, 2025

5.0

Top Doc with great skills

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July 29, 2025

5.0

Dr. Stolar and his team are the most responsive and helpful team that I've been associated with.

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Disclosures

Board of Directors

Faculty member and/or their immediate family served in a fiduciary capacity, such as a board member/director, officer, or trustee, for the following companies or other entities

Endocrine Fellows Foundation

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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