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Practice Focus Areas

This medical professional has a particular interest or expertise in:

Adult Medicine
Aviation Medical Examiner
Health Education
Men's Health
Pre-Operative Evaluation
Preventive Medicine

Education

Medical Education:: MD, University of Costa Rica - 1994
Residency:: Prime Midwest GME Consortium - 1999

Languages Spoken

French
Spanish

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:: Catherine Gratz Griffin Lake Forest Hospital

Grayslake Ambulatory Surgery Center

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

5.0

5.0

2019 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

February 27, 2026

5.0

Dr Vargas, has helped me improve my health and listens to my concerns.

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February 27, 2026

5.0

Dr. Vargas has been my doctor for many years now and he is the best.

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February 20, 2026

5.0

Dr. Vargas is a very seasoned professional. Knowledgeable and personable.

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February 18, 2026

5.0

I have been a patient of Dr. Vargas for over 25 -years and he has guided me through several challenges.

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February 18, 2026

5.0

Very professional

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February 16, 2026

5.0

I give him a 10 rating, but I'm not going to tell my friends about him because it's hard enough to get to see him as it is now a physician in very high demand.

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February 16, 2026

5.0

He is the best I will never change him.

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February 12, 2026

5.0

Excellent Dr and is bilingual and bicultural, great combination

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February 10, 2026

5.0

DR VARGAS IS VERY COMPLETE IN HIS EXAMINATION AND EXPLAINS WHAT I NEEDED TO DO VERY CLEARLY.

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February 10, 2026

5.0

I have been a patient of Dr. Vargas for many years.

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February 06, 2026

5.0

He is the BEST. Very knowledgeable, personable, caring, responsive, communicates extremely well.

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February 06, 2026

5.0

Great hospitality and great people working there

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February 05, 2026

5.0

Have been going to Dr Vargas for 25 years and his care is always excellent.

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January 26, 2026

5.0

He is a friendly, thoughtful and careful doctor.

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January 08, 2026

5.0

smart, effective doc who puts you at ease. also was on time

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January 06, 2026

5.0

Was very careful and kind and answered all my questions

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January 04, 2026

5.0

Easy to talk too.

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January 02, 2026

5.0

He is simply the best at what he does! I am so glad I found him and his care

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January 02, 2026

5.0

Great care

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December 30, 2025

5.0

He takes time to check me out and answers my questions.

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December 27, 2025

5.0

He is the best doctor I've had he asks the right questions because he cares

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December 26, 2025

5.0

Dr.Vargas is the best!!!

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December 26, 2025

5.0

Top care

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December 22, 2025

5.0

Very professional

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December 20, 2025

5.0

Knowledgeable. Friendly. Good listener.

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December 18, 2025

5.0

Nice Dr

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December 17, 2025

5.0

Professional yet approachable. Very responsive

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December 16, 2025

5.0

Short respond : great doctor with great personality

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December 14, 2025

5.0

Very personable, smart, attentive, responsive, great diagnostician!!

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December 11, 2025

5.0

Been with Dr. Vargas for many many years.

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December 09, 2025

5.0

Dr Vargas is an excellent doctor! Last year I had a high A1c. Thanks to his care I am back in the normal range. I greatly appreciate the excellent medical advice provided by Dr Vargas.

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December 07, 2025

5.0

Knowledgeable and friendly.

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December 05, 2025

5.0

Kind, knowledgeable and caring physician. Very thorough.

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December 04, 2025

5.0

He explains everything in language you can understand. He answers all your questions. Dr Vargas helps you when you don't understand the problem and has to explain everything a second time.

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December 03, 2025

5.0

Dr Vargas had a great personality besides being an excellent doctor. Very empathetic and includes you on decision making. I am extremely grateful for Dr. Vargas.

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December 02, 2025

5.0

Great doctor

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December 02, 2025

5.0

Dr Vargas is great. He has a great personality but is also very thorough and honest about what is best for your health

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November 30, 2025

5.0

He listens and gives the time for a thorough examination

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November 29, 2025

5.0

Dr. Vargas is very thorough and timely, not to mention personable. He takes the time to get to know his patients and listens to what they have to say.

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November 29, 2025

5.0

Great doctor!

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November 26, 2025

5.0

He was very willing to hear all my issues without being a slave to the clock. I felt like it was an excellent exam and I am confident in the path forward that he outlined for me.

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November 26, 2025

5.0

He is a brilliant and compassionate doctor!

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November 25, 2025

5.0

She is very kind, she knows how to listen and gives you time to talk about everything that happens to us.

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November 24, 2025

5.0

Fantastic bedside manner, very thoughtful and thorough.

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November 21, 2025

5.0

One of the most thorough physicians I have ever seen. He is knowledgeable, caring and so professional

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November 20, 2025

5.0

He is an amazing person and a gifted physician. The best.

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November 17, 2025

5.0

Diverse

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November 14, 2025

5.0

He's very understanding!

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November 10, 2025

5.0

Pleasant and professional,

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November 06, 2025

5.0

He is the best.

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November 04, 2025

5.0

Dr. Vargas is intelligent, he is a highly skilled physician and I trust him with my life!

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November 04, 2025

5.0

One of the best, a very good and kind doctor

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October 31, 2025

5.0

Dr Vargas is very thorough and informative.

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October 30, 2025

5.0

Dr. Vargas is knowledgeable, caring and communicates very well.

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October 28, 2025

5.0

He listens and he care about me and my health.

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October 27, 2025

5.0

Dr Vargas was professional and took his time asking me about my health concerns and the medical options that I have as a patient. I was very appreciative of Dr.Vargas kindness and care while discussing my heart issues.

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October 25, 2025

5.0

He is caring, compassionate, personable, and extremely smart.

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October 24, 2025

5.0

Dr Vargas listens and carefully review past and present symptoms/ concerns

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October 23, 2025

5.0

He is a good listener.

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October 22, 2025

5.0

explained things clearly

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October 13, 2025

5.0

He is just good.Very compassionate and smart

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October 07, 2025

5.0

He is a kind, knowledgeable, and caring doctor who checks his messages promptly and responds.

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October 05, 2025

5.0

He's an excellent doctor. He's thorough, listens and works hard to figure out what might be going on.

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October 03, 2025

5.0

Wonderful doctor answers all the questions and listen to my medical problems

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September 22, 2025

5.0

Exceptional and professional doctor

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September 22, 2025

5.0

He is the best in the internal medicine department. Thank you for take care of my health.

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September 22, 2025

5.0

Dr. Vargas is intelligent, he takes time with his patient, explains treatment plans and performs a thorough exam. On top of this, he is very pleasant and skilled!

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September 19, 2025

5.0

Great bedside manner and superior advice

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September 18, 2025

5.0

I am so grateful for the exceptional care from Dr. Vargas and his assistant (Yari). Your teamwork, kindness, and dedication make all the difference in my health and peace of mind.

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September 15, 2025

5.0

Dr Vargas is the best

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September 14, 2025

5.0

Capable

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September 11, 2025

5.0

Kind, listens, great care

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September 11, 2025

5.0

The most honest and upfront individual I have ever met in the profession. He shows attention to detail and cares for the individual. I appreciate him greatly.

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September 05, 2025

5.0

THANK YOU! THANK YOU! THANK YOU, Dr. Vargas!

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September 03, 2025

5.0

He has been my doctor for many years now. While I live in Lake Forest I travel to see him on Irving Park on the city. That should answer your question

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September 01, 2025

5.0

I have had him for a long time and he has never let me down

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September 01, 2025

5.0

My doctor for twenty five years

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September 01, 2025

5.0

Dr. Vargas is very kind and patient and is very thorough.

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August 30, 2025

5.0

Knowledgeable

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August 21, 2025

5.0

good care taker

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August 19, 2025

5.0

Dr Vargas listens and advises to ever I ask. Great advice

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August 17, 2025

5.0

Very personable, great care

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August 14, 2025

5.0

Dr Vargas is knowledgeable, informative, listens, allows you to be part of your health care and puts you at ease

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August 14, 2025

5.0

Dr. Vargas is the best primary care doctor I have ever met _ a consummate professional whose expertise is matched only by genuine care and dedication to patients.

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August 12, 2025

5.0

The best

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August 12, 2025

5.0

He's very thorough and takes his time to answer questions you may have.

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August 05, 2025

5.0

Very good doctor, he treated me very well.

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August 01, 2025

5.0

He is an excellent dictor

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July 29, 2025

5.0

Simply the most knowledgeable and practical doctor I have ever had.

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July 28, 2025

5.0

Great bedside manner, attentive, friendly, kind, knowledgeable.

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July 28, 2025

5.0

Great doctor, prompt and professional service, friendly

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July 28, 2025

5.0

He's so thoughtful, thorough and kind

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July 28, 2025

5.0

He's the best. He listens to all your ailments and finds all ways to help you. He's always right on target as to what's behind your ailments and finds solutions to cure you while at the same time he's explaining the whys, the dos and donts.

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July 27, 2025

5.0

Dr.Vargas responds very quickly for my needs. I sent him a message through MY Chart with pictures attached regarding a non urgent medical issue.Three hours later I received a call from his team to set up a tele visit with Dr. Vargas in 15-30 min. The visit went well and he prescribed an antibiotic to treat my issue and ordered blood work.

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July 25, 2025

5.0

Takes time to discuss issues and treatments. Wonderful Doctor.

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July 25, 2025

5.0

Excellent doctor but hard to get an appointment

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July 24, 2025

5.0

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July 23, 2025

5.0

Vargas listens to me. He has an agenda for my visit, but he also digresses to my agenda items which he always solicits.

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July 22, 2025

5.0

Professional, knowledgeable, and caring

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July 22, 2025

5.0

Dr. Vargas is a great doctor. He is always very knowledgeable and understanding. Explains everything very clearly and concisely.

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Disclosures

Leonardo Vargas, 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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HealthBeat

Common Hispanic Health Issues

Cuidando a Si Mismo

More HealthBeat Articles