Karthik Subbu, MD

Karthik Subbu, MD

4.9 
307 ratings  Read Reviews
Northwestern Medicine logoNorthwestern Medicine Regional Medical Group

Primary Specialty

Endocrinology

Is your insurance accepted? Select plan

CALL

Practice Focus Areas

Education

Medical Education:
MD, Eastern Virginia Medical School - 2018
Residency:
Indiana University School of Medicine - 2021
Fellowships:
University of North Carolina Hospitals - 2023

Languages Spoken

  • Tamil

Board Certifications

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

Practice Groups and Affiliations

Medical Group:
Northwestern Medicine Regional Medical Group
Alignment Category:
Northwestern Medicine Physician Network
On Medical Staff At:
Delnor 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.

Read Ratings FAQs

Overall Rating

4.9
4.9 

307 Ratings

Sort By Newest

Reviews from Patients

94 Reviews

Reviews from Patients

Sort By Newest
94 Reviews

April 24, 2024

5.0

Very good doctor and lots of knowledge. Great bedside manner.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 21, 2024

5.0

Dr. Subbu was very professional, knowledgeable, and friendly. We spoke about a care plan for my condition. He gave me many different options.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 20, 2024

5.0

Very attentive and knowledgeable. Answered all the questions and reassured me that the thyroid issue was under control and explained everything to me and answered all my questions and gave treatment plan and ordered required testing

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 19, 2024

5.0

He good what patient and he expand to me.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 18, 2024

5.0

Like how he explained all the steps we’re taking to get me healthier.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 18, 2024

5.0

Doctor is very specific in directing my bone health and always explained the best option of treatment.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 18, 2024

5.0

Dr. Subbu was professional, informative, and attentive.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 14, 2024

5.0

Great bedside manner.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 13, 2024

5.0

He was a wonderful doctor and person. I felt cared for and respected. He explained to me what he was doing at every moment. He was happy to answer every question. Easily my top 5 doctor visits if not top 3.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 09, 2024

5.0

He listens, comprehends and responds to what I have to say. I feel very fortunate to have him as my doctor. Very personable, I would recommend him to my parents, children, and friends. He found my wallet and brought it out to me before I left HIMSELF. He really cares about his patients. Do not let him get away, give him a raise!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 08, 2024

5.0

Dr. Subbu was great at listening to the issues and providing options.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 05, 2024

5.0

Doctor Karthik has been able to give me a good appreciation of the function of TSH and related hormones.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 03, 2024

5.0

He was very thorough and spent time with me as is patient.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

April 02, 2024

5.0

personable, listening not just hearing what I had to say when asked asked questions. very detailed which is good and right to the point.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 29, 2024

5.0

A very caring doctor, I felt like he was very concerned about my well-being. I did not feel rushed in my appointment very thorough.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 29, 2024

5.0

Willingness to hear my perspective and discuss options and goals.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 26, 2024

5.0

Extremely knowledgeable doctor

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 22, 2024

5.0

He explains everything to the patient and gives him all the information one needs and one is satisfied.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 19, 2024

5.0

He is very knowledgeable and empathetic; feel blessed to have the medical care team I do at Northwestern Medicine.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 19, 2024

5.0

He is very kind and listened to me. Enlighten me on when to be taking medication if I miss a dose that no one told me about after years of being on medication!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 18, 2024

5.0

Dr SUBBU IS VERY INTELLIGENT AND CARES ABOUT PATIENT'S OVERALL HEALTH AND WELL BEING. HIS BEDSIDE MANER IS TOP OF SCALE. THANK YOU SIR.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 03, 2024

5.0

PERSONAL TOUCH

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

March 01, 2024

5.0

I liked Dr. Subbu because he listened and came up with a plan for my recovery

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 28, 2024

5.0

He made me feel like he new what I wanted to know

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 27, 2024

5.0

For being the first time meeting Dr. Subbu, he was very detailed in my current condition as well as history of when I was diagnosed. His interest in the fluctuations of my thyroid test levels did not go unnoticed. Very happy in knowing that he cares for the patient.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 27, 2024

5.0

Fantastic person

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 27, 2024

5.0

Attention to my health needs and adjustments to achieve my personal health goals.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 27, 2024

5.0

Very caring and knowledgeable

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 27, 2024

5.0

Very caring and knowledgeable

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 26, 2024

5.0

Very informative, and personable.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 25, 2024

5.0

He was polite, smiley, friendly and had a sense of humor. Did not rush me out the door. Answered all my questions.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 23, 2024

5.0

Dr. Subbu took care to listened to my concerns, the appointment was not rushed. I felt heard and not dismissed.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 21, 2024

5.0

Dr. Subbu is patient and kind. He makes sure he explains new information carefully until you have fully grasped all the details. You will leave with helpful print outs to refer to later.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 16, 2024

5.0

After years of unsuccessful attempts to control my diabetes, I walked into Dr. Subbu's office for my first visit. He educated me on diabetes care in a way that gave me confidence that I would be able to take care of my diabetes management. And I am!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 07, 2024

4.0

Very fast diagnosis

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

February 05, 2024

5.0

Very knowledgeable and nice manner.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 31, 2024

4.0

He listened and showed he cared

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 28, 2024

5.0

Very nice and caring doctor

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 26, 2024

5.0

See above. Great Dr. explains everything.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 25, 2024

5.0

For being there for the first time I was very pleased with his concerns and order labs to find the cause of my symptoms

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 25, 2024

5.0

He is very knowledgeable and attentive about care.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 23, 2024

5.0

I was checked in quickly and was able to see Dr. Subbu soon after that. First time meeting this Doctor. He listened to me and had good feedback for me. He was friendly with a good "bed side manner".

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 17, 2024

5.0

He is a great Docter!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 17, 2024

5.0

Very kind and understanding. Great at helping me understand my medical issue.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 15, 2024

5.0

Dr. Subbu take time to listen to you may it be questions you have or thoughts. Never in a rush to get done with the appointment you have with him. He offers other suggestions for you to try.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 12, 2024

5.0

They have the best doctors and nurses they help you right away

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 10, 2024

5.0

My doctor is very thorough. He listens to my concerns.He is knowledgeable and very patient.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 10, 2024

5.0

Knows his stuff. Learnedbsome new things. Good visit.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 08, 2024

5.0

Dr. takes the he time to explain everything he is thinking and asks our opinion.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 06, 2024

5.0

Provided very helpful insight regarding my lab results and treatment plan.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

January 01, 2024

5.0

Very knowledge and seemed to genuinely care about my health.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 31, 2023

5.0

He is very comforting and knowledgeable and willing to explain what’s going on with my issue.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 30, 2023

5.0

Dr. Is very knowledgeable, personable and listens to your medical concerns and needs. He does not impose unnecessary medications on you. Five stars from me!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 27, 2023

5.0

Listened to my concerns and was very easy to talk to! Made me feel comfortable.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 19, 2023

5.0

Dr Subbu is one of the best doctors I have had. Very knowledgeable, explains everything thoroughly, and so personable!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 15, 2023

5.0

Very patient took the time out to let me know the plan he had for my diabetes.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 12, 2023

5.0

I would highly recommend Dr.Subbu!!! First I appreciate for really showing genuine concern for my health and listening to what my concerns were with diabetes and thyroid. My appointment went extremely well!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 12, 2023

5.0

Very thorough

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 07, 2023

5.0

Dr. Subbu is very thorough. He listened to my concerns and answered all of my questions. He has a great personality as well. That’s very important! I felt as though as I was in great hands!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

December 05, 2023

5.0

Dr. Subbu is a knowledgeable, professional, and friendly doctor. He takes the time to problem solve with you.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 29, 2023

5.0

Very good doctor explains everything very well

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 28, 2023

5.0

He was friendly and approachable. He answered my questions thoroughly and patiently. I appreciated his personable nature.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 28, 2023

5.0

He kind compassionate. Listens, takes time

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 27, 2023

5.0

He listened intently, gave needful education and asked amazing questions.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 25, 2023

5.0

Dr. Subbu took the time to answer all of my questions, was reassuring and very educational.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 22, 2023

5.0

DR Subbu is very professional and helpful.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 14, 2023

5.0

Very good. Addressed questions and was very helpful.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 13, 2023

5.0

Dr. Sabbu is an active listener. It was very obvious that he was making every effort to deliver the gold standard of care. And he did!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 08, 2023

5.0

He takes his time with you. Works on getting the problem solved. Listens to what you have to say.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 08, 2023

5.0

Very knowledgeable and professional

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 07, 2023

5.0

Very thorough and answered all of my questions.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 03, 2023

5.0

Dr. Subbu is outstanding. He listens, informs, explains, is reasonable. His knowledge is far reaching, he researches unfamiliar topics. Most important he works with the patient to determine the best solution.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 03, 2023

5.0

Dr. Subbu was extremely nice and I was very happy with my visit. He was very knowledgeable and made me feel SO comfortable. I went in scared and nervous and came out feeling like we were going to get to the bottom of whatever is wrong! He had an answer for every question I had!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

November 02, 2023

5.0

Good service

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 28, 2023

5.0

They are very professional

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 25, 2023

5.0

Very informative easy to talk to

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 24, 2023

5.0

He was very helpful and went an extra mile to answer my questions over the video

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 18, 2023

5.0

Explained everything so perfectly.. even took time to hear my wife out! Lol this will be a place that I will always recommend! Excellent staff

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 16, 2023

5.0

A very knowledgeable and patient-focused doctor

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 12, 2023

5.0

Dr. Subbu was just excellent. Good communicator, easily tied together, disparate test results and terms and explained it in plain English and aloud for actions and questions. It was excellent at enabling me as a patient to be a part of the process other than just provide test results.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 05, 2023

5.0

Doctor Karthik Subbu had lots of patience, answered all of my questions, He was very kind and professional and explain me all the information about my health. I highly recommend him Thank you for taking care of my health.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

October 04, 2023

5.0

Dr. Subbu was super nice and approachable, explained everything in simple terminology, and he even accommodated to my schedule with a video appointment

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 29, 2023

5.0

He is very knowledgable with a friendly demeanor.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 29, 2023

5.0

Dr. Subbu, who I saw for the first time today, listened to everything I wanted to ask him, answered all my questions and was very knowledgeable and kind!

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 28, 2023

5.0

Cares about patients

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 27, 2023

5.0

Great doctor who explains everything tome.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 25, 2023

5.0

Dr.Subbu is incredibly personable and very friendly. He is very intelligent and really took the time out to talk to me and showed me he cared. I really appreciate him and I look forward to our next visit. I wish he did family medicine so I can make my primary care doctor also.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 19, 2023

5.0

Outstanding Doctor. Kind, Caring, Compassionate and relates to his patients

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 14, 2023

5.0

because he took his time and gave me a thorough exam

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 13, 2023

5.0

He listened and seemed to really care. He probably spent way too much time with me, but he actually moved me to action. He explained the biopsy results to me in a way that I could understand.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 13, 2023

5.0

Very friendly , listens to your concerns , no rushing, helping me with other issues,

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 13, 2023

5.0

He is amazing.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 08, 2023

5.0

Professional, Kind, Caring, Good at explaining the medication and options

Was this helpful? Yes (0) No (0)

Thanks for your feedback!

September 07, 2023

5.0

Dr. Subbu Was so kind and Caring he took time to explain everything to me. He was not in a hurry to leave. He walked me out and gave me my paper work and asked if I had any questions from our visit. I felt so comfortable being in his care.

Was this helpful? Yes (0) No (0)

Thanks for your feedback!
View more reviews

Disclosures

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.

View More Disclosures