Thomas  Klarquist

Thomas Klarquist, M.D.

3134 North Clark Street

Chicago, Illinois 60657

Call Now:


Coronavirus Alert

Learn what to do if you think you've been exposed to COVID-19. Stay up to date with our Resource Center.

No-Visitor Policy

No visitors, with few exceptions, will be allowed in any inpatient areas until further notice. Learn more.

Thomas Klarquist, M.D.

Internal Medicine

HIV medicine

3134 North Clark Street

Chicago, Illinois 60657


Open today 8:00 am

5:00 pm

Open today 8:00 am

5:00 pm

Open today 8:00 am

5:00 pm

Open today 8:00 am

7:00 pm

Open today


Open today 8:00 am

12:00 pm

Open today


To better serve our patients during the spread of COVID-19, we ask that you call your doctor’s office to schedule an appointment. Our online scheduling feature will be available again in the near future.

Or you can see a provider 24/7 with a video visit or e-visit.

What should I do if I have COVID-19 symptoms?

If you think you’ve been exposed to COVID-19 or are experiencing symptoms, see a provider 24/7 with a video visit. We’ll help you get the care you need. And stay up to date about COVID-19 in our Resource Center.

View Video

In my practice, I not only enjoy practicing preventive medicine and improving the quality of patient's lives but also providing care for urgent and unexpected problems. I want patients to feel comfortable to come with me with any problems and together we will work to find solutions.

About Me

  • Medical Specialties: Internal Medicine
  • Primary Area of Focus: HIV medicine
  • Gender:
  • Age: 58
  • Years in Practice:
  • Board Certifications: Internal Medicine



  • Residency: Michigan State University
  • Internship: University Of Louisville School Of Medicine
  • Medical School: Michigan State University

Hospital Affiliations

  • Advocate Illinois Masonic Medical Center

Ratings and Comments

Thomas Klarquist, M.D.

4.8 out of 5

839 Patient Ratings

Gives easy to understand instructions

4.8 out of 5

780 Patient Ratings

Explains in a way you understand

4.9 out of 5

838 Patient Ratings

Listens carefully to you

4.8 out of 5

838 Patient Ratings

Knows your important medical history

4.6 out of 5

834 Patient Ratings

Shows respect for what you say

4.8 out of 5

835 Patient Ratings

Spends enough time with you

4.8 out of 5

833 Patient Ratings


Ok care, but bed side manner is a little distant and not so concerning. Wanting things to be done ASAP. Not wanting to involve self too deeply.

Reviewed on November 30, 2019 1:46 AM

It went well.

Reviewed on November 26, 2019 4:40 PM

Nice and easy... as always. No complaints, only compliments.

Reviewed on November 25, 2019 1:50 PM

Wasn't happy with the 1-hour wait for the blood & urine tests...

Reviewed on November 25, 2019 1:50 PM

I have been seeing Dr. Klarquist for about 15 years or more. Unfortunately my health insurance does not accept Advocate, however I like the Dr. so much that I pay out of pocket. He is very through and a great doctor

Reviewed on November 24, 2019 8:20 PM

I love Dr. Tom. I have some issues with compassion and actual listening but I would not trade him for anything! He is awesome, cares tremendously about his patients. I think he is very sympathetic and kind but it doesn't always shine through...guarded as it were emotionally which is understandable since he is saving the world and can't get emotionally involved with every patient! some of his staff I do not care for since they need retraining in their personalities and when I reported it, it was summarily dismisses with no follow up as if it never happened or was minuscule. still bot over that one issue and will never be so now I am a bit guarded and it's all business for me from here in out with no room for personal feelings anymore which is rather sad but necessary. it's as if you've realized that someone you put on a pedestal is not the god you revere them to be...only human with traits and characteristics just like everyone else that makes them a mere mortal.

Reviewed on November 20, 2019 9:42 AM

Dr. Klarquist and the team at Advocate Medical Center are fantastic! They are always courteous and help my family in our medical care.

Reviewed on November 18, 2019 10:47 AM


Reviewed on November 16, 2019 5:10 PM

Good interaction

Reviewed on November 16, 2019 5:10 PM

My last visit was very good & myself was satisfied, Dr. is friendly and experienced professional

Reviewed on November 15, 2019 11:00 PM

Nice experience

Reviewed on November 15, 2019 11:00 PM


Reviewed on November 15, 2019 11:00 PM

Very happy with all _____ providers at I. Masonic Advocate. They are life savers!

Reviewed on November 15, 2019 9:50 AM

I really liked Dr. Klarquist. I felt comfortable speaking with him about all of my health concerns, and the way he communicated was clear and easy for me to understand.

Reviewed on November 12, 2019 9:29 AM

doctor excellent. office and advocate health horrible.

Reviewed on November 11, 2019 1:21 PM

I have been a patient of Dr. Klarquist's for approximately 12 years and he is absolutely the best - kind, understanding and always ready to listen to what I have to say. I believe it is rare to find such a great doctor and I feel very lucky that I am his patient.

Reviewed on November 10, 2019 11:00 PM

Dr. Klarquist has always had my best interests in mind.

Reviewed on November 8, 2019 11:00 PM

Always treated with respect and kindness

Reviewed on November 8, 2019 11:00 PM

I think he is wonderful. He always helps me with what I need. He has a great "bedside manner." He is very knowledgeable.

Reviewed on October 28, 2019 7:00 PM

Dr. Klarquist is an excellent physician, listens to his patients and explains clearly all questions asked.

Reviewed on October 27, 2019 7:00 PM

Love coming to this facility and the staff are great.

Reviewed on October 25, 2019 7:00 PM

He is always prompt, good natured, and knowledgeable.

Reviewed on October 20, 2019 7:00 PM

It is very noticeable that Advocate can only allow their doctors a certain amount of time to spend with each patients and to try and sell additional test without explaining the reason for these additional tests. Reveune seems now to be more important then spending 5 more minutes with the patient.

Reviewed on October 20, 2019 7:00 PM

Always an excellent experience.

Reviewed on October 18, 2019 7:00 PM

I trust you with my health care.You treat me with respect and listen as to what my concerns are.Give me advise on what can better me ion my health.I feel I have finally found a doctor that listens. Truly a very nice doctor.

Reviewed on October 14, 2019 7:00 PM

Dr. Klarquist is great. Always spends adequate time with me.

Reviewed on October 14, 2019 7:00 PM

Good experience

Reviewed on October 14, 2019 7:00 PM

I will be looking for a new provider outside of Illinois Masonic. Between Dr. Klarquist and Dr. X, I can honestly say I haven't received such terrible service before.

Reviewed on October 13, 2019 7:00 PM

Dr K is a friendly, knowledgeable provider looking at a holistic health perspective.

Reviewed on October 11, 2019 7:00 PM

Dr understood my need and told me steps to be taken to resolve the problem

Reviewed on September 29, 2019 7:00 PM

It was an excellent experience.

Reviewed on September 28, 2019 7:00 PM

Always fun to visit Tom's office, from the receptionists, to the nurse taking care of me and my vitas, to Tom himself. This time I used the lab for the first time, and was happy with the timing, although I had an early morning appointment.

Reviewed on September 26, 2019 7:00 PM

my provider is awesome

Reviewed on September 19, 2019 7:00 PM

Dr. Klarquist is an excellent provider. He knows my health history well and gives me personalized attention. He is always willing to adjust his schedule to see me whenever I need to.

Reviewed on September 15, 2019 7:00 PM

I liked this doctor a lot. Answered all my questions and was very helpful in explaining my situation.

Reviewed on September 15, 2019 7:00 PM

A good doctor with knowledge and good experience - My first time there and I don't have any complaints..

Reviewed on September 9, 2019 7:00 PM

Excellent, Dr. Klarquist is a skilled diagnostician with a positive attitude!

Reviewed on September 8, 2019 7:00 PM

Tim, the MA that worked with me, was incredibly nice and professional. He quickly faxed over my yearly physical paperwork once my labs were back, and I greatly appreciate his attention to detail. Dr. Karlquist is an amazing PCP, and I'm so lucky to have found him shortly after moving to Chicago. Thank you for your calm demeanor and thorough approach.

Reviewed on September 6, 2019 7:00 PM

I was very pleased with how fast the lab results were posted in the Portal. I also appreciated the responses from the doctor. The Portal is a great way to get the answers you need.

Reviewed on September 3, 2019 7:00 PM

I have had Dr. Klarquist as my doctor for perhaps 30 years. He is exceptional.

Reviewed on September 1, 2019 7:00 PM


Reviewed on August 26, 2019 7:00 PM

very polite and showed interest about my situation

Reviewed on August 19, 2019 7:00 PM


Reviewed on August 5, 2019 7:00 PM

Dr. Klarquist genuinely cares about his patients. He knew that I worked in healthcare and my hours are very limited so he informed me that he had appointments that he would be try to fit me in the future if I messaged him. He is an active listener and able to reflect on health concerns. Provides suggestions that I did not know that I have not done for a while such as have my lipid panel and A1c completed. Screens all of necessary shots that I need to update. Very thorough with his care.

Reviewed on August 4, 2019 7:00 PM

Always excellent! Awesome doctor, always respectful and helpful

Reviewed on July 29, 2019 7:00 PM

Professional, caring, informative.

Reviewed on July 29, 2019 7:00 PM

Everything about the visit was great except when I got my blood drawn the phlebotomist hit a nerve in my arm and I couldn't go to the gym for 2 weeks while it healed.

Reviewed on July 29, 2019 7:00 PM

A very helpful follow-up visit to monitor and discuss my improved blood pressure and the medication that has improved it, as well as obtain a tetanus shot and discuss other immunization updates needed.

Reviewed on July 28, 2019 7:00 PM

I am very very happy with my Doctor and the referrals I have been given under my HMO plan

Reviewed on July 28, 2019 7:00 PM

Was great to meet Dr. Tom, and I look forward to a long tenure as his patient.

Reviewed on July 28, 2019 7:00 PM

Always good to see Dr K. quick in and out

Reviewed on July 28, 2019 7:00 PM

I thought the visit went very well. There is a large and comfortable waiting area. There are also many rooms for the Doctors to see patients. Finally there is a parking lot that is attached to the building.

Reviewed on July 21, 2019 7:00 PM

Dr Klarquist and his team are the best. Can't say enough good things about him- he's caring and he knows what he's doing.

Reviewed on July 21, 2019 7:00 PM

Dr Klarquist knows me, cares about my health and well being. he's professional and compassionate at the same time. he responds almost immediately to messages I send him in the portal. I am so happy I found Dr Klarquist when I moved to Chicago 6 years ago!

Reviewed on July 20, 2019 7:00 PM

Very pleased with the doctor, medical and administrative staff, and facilities

Reviewed on July 14, 2019 7:00 PM

My experience with my provider was always good.

Reviewed on July 12, 2019 7:00 PM

First visit to new office on Clark. Registration and wait time very smooth and coordinated.

Reviewed on July 9, 2019 7:00 PM

First appointment, and it was good.

Reviewed on July 7, 2019 7:00 PM

always very satisfied with Dr Klarquist and his his staffing IMMC.

Reviewed on July 7, 2019 7:00 PM

I love my doctor. he listens to me and makes serious recommendations but also will help me follow through on things I recommend

Reviewed on July 3, 2019 7:00 PM

My Doctor is great. Advocate is not. I had to wait a month to get an appointment. The new waiting room has all the cold comfort of an airport. The reception staff is cold and impersonal.

Reviewed on June 30, 2019 7:00 PM

My doctor is very good and listens.

Reviewed on June 24, 2019 7:00 PM

I like the provider, but dealing with Advocate and making appointments for tests and specialists is not easy and is often very frustrating.

Reviewed on June 23, 2019 7:00 PM

very good.

Reviewed on June 23, 2019 7:00 PM

Excellent care, but a particularly long wait in the waiting room.

Reviewed on June 23, 2019 7:00 PM

Easy scheduling and friendly experience. I appreciate my doctor offering to follow up with the specialist he referred me to if the scheduling was a challenge.

Reviewed on June 19, 2019 7:00 PM

Provider was excellent as well as staff.

Reviewed on June 10, 2019 7:00 PM

I enjoy talking with Dr. Klarquist.

Reviewed on June 3, 2019 7:00 PM

I enjoy seeing Dr. Klarquist. He is always nice and takes the time to talk through anything I want to address.

Reviewed on June 2, 2019 7:00 PM

Dr. Klarquist is a wonderful and attentive doctor.

Reviewed on June 2, 2019 7:00 PM

great experience. open comunication.

Reviewed on May 26, 2019 7:00 PM

Dr. Klarquist seemed aloof and business-like. I wish he were more empathetic.

Reviewed on May 24, 2019 7:00 PM

Dr. Klarquist is so AMAZING! He is compassionate, kind and forever willing to keep my best interest in mind... my husband and I love him.

Reviewed on May 21, 2019 7:00 PM

Great and very satisfied with my provider and medical team of doctors.

Reviewed on May 20, 2019 7:00 PM

enjoyable and very comfortable to speak with

Reviewed on May 20, 2019 7:00 PM

Dr Klarquist is the only reason I continue to visit this location and I have considered changing providers often.

Reviewed on May 19, 2019 7:00 PM

Dr. Klarquist has a great bedside manner and I generally have a nothing negative to say about him. He always responds when I message him and treats me with respect.

Reviewed on May 19, 2019 7:00 PM

Dr. K is great!

Reviewed on May 19, 2019 7:00 PM

The Provider was wonderful the new facility on hasted is god awful. I hate it with all my heart. It is to big, it is cold and impersonal. The very walls are sterile and stark. Break the building up in to sections, put some art on the walls. paint the could walls. put some art in the building the place feels like a morgue no exaggeration.

Reviewed on May 12, 2019 7:00 PM

like my doctor

Reviewed on May 4, 2019 7:00 PM

Pleasant visit. Informative test results.

Reviewed on May 3, 2019 7:00 PM

Love the new office. Very good for patient flow from check in thru visit. Tim was excellent assistant for Dr Klarquist. Very caring and asked a lot of questions. Dr Klarquist very knowledgeable and takes time to answer all health questions.

Reviewed on April 29, 2019 7:00 PM

Overalll it was excellent. Provider gave me advice to improve my overall health.

Reviewed on April 28, 2019 7:00 PM

Dr. Klarquist is the best!

Reviewed on April 28, 2019 7:00 PM

Personable and a good listener. Addressed issues and concerns and provided relevant information.

Reviewed on April 28, 2019 7:00 PM

Provider always conducts himself in a professional and courteous manner.

Reviewed on April 26, 2019 7:00 PM

It is very frustrating when I have to repeat my medical history and medications every single time I go to the doctor. I asked what happened to my medical records and the only response I get is that they transitioned to a new system and it's easier to just ask the patient than go look it up. Where are my medical records and how do I request a copy of them including notes?

Reviewed on April 21, 2019 7:00 PM

Very nice first visit. The new space is very nice.

Reviewed on April 19, 2019 7:00 PM

He has a friendly, warm, compassionate manner.

Reviewed on April 15, 2019 7:00 PM

like the provider. dislike the facility

Reviewed on April 14, 2019 7:00 PM

answer all question.

Reviewed on April 14, 2019 7:00 PM

the actual visit with care provider went well and professional however other aspects were lacking. there was a 10 minute wait in line to check in for the appointment then waited 15 minutes to be seen, but the worst was the wait for labwork. I waited 45 minutes for phlebotomy. this is unacceptable

Reviewed on April 14, 2019 7:00 PM

Dr Klarquist is very knowledgeable and definitely cares about my health.

Reviewed on April 14, 2019 7:00 PM

Dr. Klarquist is excellent at responding to questions through the app. He cares about my condition. It would be helpful if he gave more explanation about what tests he was running and why. Also, it would help me for him to reiterate healthy practices and reaffirm that the health care plan we are taking is the correct one.

Reviewed on April 14, 2019 7:00 PM

Dr. Klarquist treated me like a human being. he took the time to talk with me and to get to know me beyond my medical record number and DOB.

Reviewed on April 13, 2019 7:00 PM

I feel like my provider takes the time to ask me questions about my health and how I feel in general. He is very knowledgeable about my health history and seems concerned about my physical well-being. He keeps my health concerns in line with the things I should do to stay healthy.

Reviewed on April 12, 2019 7:00 PM

very good

Reviewed on April 7, 2019 7:00 PM

Just moved to town and needed a PCP that took my insurance that was close to home. Hospital is new, clean and comfortable. Dr. Klarquist is great!

Reviewed on April 6, 2019 7:00 PM

Dr. Klarquist is the first GP that I've visited that I've felt comfortable making my primary care physician. Highly recommended.

Reviewed on March 24, 2019 7:00 PM

my visit with Dr. Klarquist went very well he's very informative and explained everything thoroughly.

Reviewed on March 17, 2019 7:00 PM

health eNews with Thomas Klarquist, M.D.

Medical Areas of Expertise

View More View Less

Clinical Interests

  • Anxiety Disorders
  • Cholesterol
  • Depression
  • GI Diseases
  • HIV
  • Hypertension
  • LGBTQ Health
  • Men's Health
  • Preventive Health
  • Respiratory Care
  • Sexually Transmitted Disease
  • TGNC - Hormone/Surgery/Procedures
  • Travel Medicine
  • Urinary Tract Infection


  • AAH Preferred – Team Member Plan
  • AAH Select – Team Member Plan
  • AARP MedicareComplete Plus HMO - POS
  • Aetna Better Health Premier Plan MMAI
  • Aetna Choice POS
  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice (MC) POS
  • Aetna NAP - PPO
  • Aetna Open Access POS
  • Aetna Open Choice POS
  • Aetna Open Choice PPO
  • Aetna Select Choice EPO
  • Aetna Select POS
  • Aetna Signature Administrators PPO
  • Aetna US Healthcare Medicare Advantage HMO
  • Beech Street Network PPO
  • Blue Advantage HMO
  • Blue Cross HMO Illinois
  • Blue Cross Medicare Advantage HMO
  • Blue Cross Medicare Advantage HMO - POS
  • Blue Cross Medicare Advantage PPO
  • Blue Cross PPO
  • Blue Cross PPO - Advocate Associate Medical Plan
  • Blue Precision Bronze HMO
  • Blue Precision Gold HMO
  • Blue Precision HMO
  • Blue Precision Platinum HMO
  • Blue Precision Silver HMO
  • BlueCare Direct
  • Cigna C - 5 POS
  • Cigna Health Partners POS
  • Cigna Health Partners PPO
  • Cigna Open Access Plus POS
  • Cigna Open Access Plus State of Illinois POS
  • CIGNA Open Access POS
  • Cigna POS
  • Cigna PPO
  • Cofinity PPO
  • Coventry HMO
  • Coventry One Select PPO
  • Coventry PPO
  • Coventry Workers Comp PPO
  • First Health Network EPO
  • First Health Network PPO
  • Great West Healthcare - Cigna HMO
  • Great West Healthcare - Cigna Open Access Plus HMO
  • Great West Healthcare - Cigna PPO
  • Harken Health Choice Plus
  • Harken Health Compass Plus
  • Health Alliance HMO
  • Health Alliance PPO
  • Healthlink PPO
  • HealthSpring Medicaid ICP
  • HealthSpring Medicare HMO
  • HealthSpring MMAI
  • HFN Platinum EPO
  • HFN Total Care PPO
  • Humana Choice POS
  • Humana Gold Choice PFFS
  • Humana Gold Choice PPO
  • Humana Gold Plus HMO
  • Humana Gold Plus Integrated-Medicare-Medicaid Plan
  • Humana HMO Select
  • Humana Illinois Platinum HMO
  • Humana Integrated Care Program of Illinois
  • Humana Medicaid Managed Care Plan
  • Humana National EPO
  • Humana National HMO
  • Humana National POS - Open Access
  • Humana National PPO
  • Humana POS
  • Humana PPO
  • LLH Adventist Silver PPO 3000
  • LLH Family Health Network Silver PPO 3100
  • LLH Swedish Covenant Silver PPO
  • Meridian
  • Meritain Health PPO
  • MultiPlan PPO
  • NALC (Natl Assn of Letter Carriers) Health Benefit
  • PHCS Savility PPO
  • Preferred Network Access PPO
  • Three Rivers Provider Network PPO
  • Tricare POS
  • Tricare PPO
  • UFCW Local 1546 Health and Welfare Fund (UMC)
  • UHC / AARP MedicareComplete (Secure Horizons) HMO
  • UHC / AARP MedicareComplete Focus HMO
  • Union Medical Care PPO
  • United Healthcare Charter
  • United Healthcare Choice HMO
  • United Healthcare Choice Plus POS
  • United Healthcare Compass HMO
  • United Healthcare Group Medicare Advantage PPO
  • United Healthcare Medicare Solutions PPO
  • United Healthcare MedicareComplete Plan 1 HMO
  • United Healthcare Navigate HMO
  • United Healthcare Navigate POS
  • United Healthcare Nexus
  • United Healthcare Options PPO
  • United Healthcare Select EPO
  • United Healthcare Select HMO
  • United Healthcare Select Plus POS


Learn more about this provider and request an appointment online. Prior to requesting an appointment with any provider you select, confirm with your insurance carrier that this doctor is in your insurance network.

Information listed under the "clinical interests" columns was supplied by the physicians. It is provided to you for informational purposes only, and neither Advocate Health Care nor the Advocate facility has independently verified the information. If you wish to confirm the information contained herein, or if you have any other questions about a particular physician, please contact the physician’s office.

Unless otherwise stated, physicians are independent practitioners who are not employees or agents of Advocate Health Care or the Advocate facility where the care is being provided. Neither Advocate Health Care nor the Advocate facility shall be liable for the medical care provided or decisions made by these independent physicians.

Website link: