Ioannis Papagiannis, MD

4.9

1119 ratings Read Reviews

Northwestern Medical Group

Primary Specialty

Endocrinology

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Practice Focus Areas

This medical professional has a particular interest or expertise in:

Adrenal Disorders
Adult Type 1 Diabetes Mellitus
Parathyroid Disease
Pituitary Disorders
Thyroid Cancer
Thyroid Disease
Thyroid Nodules
Type 2 Diabetes

Education

Medical Education:: MD, University of Athens Faculty of Medicine - 2000
Internship:: Jacobi Medical Center/Albert Einstein College of Medicine - 2006
Residency:: Rutgers Robert Wood Johnson Medical School - 2008
Fellowships:: Cleveland Clinic Foundation - 2009

Vanderbilt University Medical Center - 2011

Media

Languages Spoken

Greek

Board Certifications

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

Faculty Profile

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

1119 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

February 26, 2026

5.0

He is clinically knowledgable, personable and understands my complex overall case.

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February 25, 2026

5.0

Like I said he takes time with his patients and is very therapeutic

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February 24, 2026

5.0

Dr Papagiannis was incredible. He made me feel comfortable and heard. He reviewed my options with patience and care. Dr Papagiannis reviewed my medical history and found things no one else has. I wouldn't recommend any other endo.

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February 23, 2026

5.0

Same as above. Everyone is great.

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February 21, 2026

5.0

Quality care

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February 19, 2026

5.0

He listens and gives excellent advice.

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February 19, 2026

5.0

He is one of a kind

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February 10, 2026

5.0

Good rapport. Explains things well. Answers questions. Listens. Runs appointments on time.

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February 10, 2026

5.0

He is the best endocrinologist. I dont know what i would do without him as my Dr

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February 10, 2026

5.0

He really explained things and went over all options for moving forward

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February 09, 2026

5.0

Dr. Papagiannis has a wonderful bedside manner! He was patient with my questions, thorough in his explanations of tests that were already performed and would be done in the future. I feel confident that he has a thorough plan laid out for the future and he was open to my feedback regarding various plans. I absolutely would recommend Dr. Papagiannis!

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February 04, 2026

5.0

Excellent Care!!

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February 04, 2026

5.0

Great dr

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February 04, 2026

5.0

Dr. Papagiannis really takes the time to listen and talk to me. I feel at ease after each appointment knowing that he is knowledgeable about my cancer and treatment and truly cares about my health.

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January 30, 2026

5.0

I can't recommend Dr. Papagiannis highly enough. From the first visit, he was thorough, knowledgeable, and genuinely attentive. He took the time to listen to my concerns, explained my condition and treatment options clearly, and never made me feel rushed or dismissed. What really stands out is his ability to combine deep medical expertise with compassion. He always looks at the whole picture, not just lab numbers, and tailors my treatment in a way that feels thoughtful and personalized. Follow-up care has been excellent, and communication is clear and responsive. Dr. Papagiannis is professional, caring, and truly invested in his patients' well-being. I'm very grateful to be under his care.

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January 29, 2026

5.0

He is GREAT!!! Asked great questions and reviewed my previous history and we came up with a game plan. Very patient and compassionate.

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January 28, 2026

5.0

Dr Papagiannis is friendly and easy going, and listens to my concerns. He is responsive and has treated my Thyroid and TED symptoms with care.

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January 24, 2026

5.0

I was very pleased with the care and concern given by Dr. Papagiannis during my resent visit. It was the first time meeting with Dr. Papagiannis and felt very comfortable during the consultation. He provided me with information, answered my questions and had a plan of action.

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January 23, 2026

5.0

Excellent doctor

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January 23, 2026

5.0

Dr. Papagiannis takes the time to listen to my concerns. He's one of the very few doctors who genuinely wants to help me feel better.

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January 21, 2026

5.0

He explains things confidently and thoughtfully and listens.

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January 20, 2026

5.0

He put me at ease, explained everything he would be doing, & everything he expected from me. I was very confident in his abilities.

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January 20, 2026

5.0

He was excellent. Took his time to really explain my concerns and talk me through everything. Kind, personable and knowledgeable. Would definitely send others to him

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January 15, 2026

5.0

Great doctor and up to date on new studies

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January 08, 2026

5.0

The doctor takes the time to discuss issues and explains everything.

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December 24, 2025

5.0

Very good doctor

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December 19, 2025

5.0

The Dr is polite and cares about his patients. He is well educated

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December 18, 2025

5.0

Of course, I recommend the doctor to others because he always have a solution for any situation.

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December 17, 2025

5.0

Dr. P is kind, knowledgeable and provides the best care!

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December 13, 2025

5.0

Explains clearly what you need to know

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December 10, 2025

5.0

Demonstrate professionalism, respect, knowledge, ability to answer questions, and empathy.

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December 09, 2025

5.0

Dr. Papagiannis is an excellent doctor.

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December 09, 2025

5.0

He's thorough and personable. I felt very comfortable with his diagnosis and his knowledge.

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December 04, 2025

5.0

Dr.Papagiannis was informative about my condition

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December 04, 2025

5.0

Excellent researcher and doctor. I'm grateful to be in his care

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December 03, 2025

5.0

Professional expert.

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November 21, 2025

5.0

Dr Papagiannis is amazing with his patients. He is very attentive to my concerns and health. Always takes time to listen. He is very knowledgeable and helpful.

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November 20, 2025

5.0

One of the best doctors I have been to over the years. He knew his way around Epic very well, great explanations of my situation and put together a solid game plan.

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November 19, 2025

5.0

Dr. Papagiannis is very thorough and explains everything clearly. He is kind and listens to my questions and concerns, provides pros and cons for various options for my care.

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November 19, 2025

5.0

Dr. Papagiannis is very thorough, kind, and explains things in detail.

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November 18, 2025

5.0

Such a thoughtful person and very thorough. He spent extra time to make sure I felt better before I left after a procedure

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November 18, 2025

5.0

Very thorough and explained everything very clearly.

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November 17, 2025

5.0

Dr Papagiannis is excellent. I respect his experience and inclusive approach to treatment. He truly treats you like a family member, he listens to your concerns then offers options. He is very relatable and in this day of being hurried through appointments, I have never been made to feel like a number. He is the best!

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November 15, 2025

5.0

Impressive grasp of medical knowledge and impeccable bedside manner giving complex information in simple terms that a patient can grasp connecting all the dots in an organized manner.... Impressive interpersonal people skills that are intuitive

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November 14, 2025

5.0

Shows he cares

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November 12, 2025

5.0

Thorough explanations

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November 09, 2025

5.0

I have put my complete trust in Dr. Papagiannis. I truly believe he's the best!

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October 31, 2025

5.0

Explained. Answered my questions. Took time. To the point. Practical. Professional

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October 27, 2025

5.0

He was on time, extremely thorough, and to the point regarding my care. I felt he was a good listener and answered all of my questions in a kind, professional manner.

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October 23, 2025

5.0

Bedside manner. Approach to medical planning. Top tier. I fought hard to find a good doctor years ago and have no regrets

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October 19, 2025

5.0

Expertise

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October 16, 2025

5.0

Doctor is awesome. He always explain everything thoroughly to me where I do understand what he's doing. Also go over my medication always ask if I have any questions.

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October 15, 2025

5.0

Very efficient, kind, and knowledgeable. Is prepared when he talks to us. Can tell that he's studied our records before our appointment.

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October 11, 2025

5.0

Dr. Papagiannis is wonderful - caring and knowledgeable. I have confidence in him.

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October 09, 2025

5.0

he is professional, caring and very knowledgeable

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October 08, 2025

5.0

The most comprehensive exam I have had. Dr. P was thoughtful, informative, patient and answered all my questions. I am very grateful

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October 03, 2025

5.0

Knowledgeable and with a good bedside manner

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October 01, 2025

5.0

knowledgeable and professional. Willing to listento.

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September 30, 2025

5.0

Dr. Papagiannis is encouraging and informative. He patiently answers our questions and often anticipates my concerns. Dr. Papagiannis goes out of his way to provide advice that we may not even have considered due to our lack of knowledge. He has a most helpful, friendly and warm personality. I would definitely be comfortable in recommending him.

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September 24, 2025

5.0

Dr P listens, he's caring and intelligent

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September 19, 2025

5.0

He listens to me and is caring

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September 18, 2025

5.0

Dr Papagiannis is knowledgeable, kind and has excellent bedside manners. I would absolutely recommend him to my family and friends.

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September 17, 2025

5.0

Dr. Ioannis Papagiannis is great and explained everything to me in detail and with great patience. I just felt confident with him as we both mutually agreed on the course of my healthcare.

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September 17, 2025

5.0

Takes his time to explain the reasons behind the numbers and which medications would be best.

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September 16, 2025

5.0

Great doctor. Cares about me.

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September 15, 2025

5.0

Detail oriented and explain everything

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September 13, 2025

5.0

See above. Besides the former Dr Papagiannis presented as personable and caring

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September 11, 2025

5.0

Excellent, knowledgable & efficient

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September 09, 2025

5.0

Patient, intelligent and very reasonable.

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August 31, 2025

5.0

Excellent doctor and very knowledgeable about his profession.

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August 28, 2025

5.0

A great doctor that listens to you !

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August 27, 2025

5.0

The best doctor I've ever had. He's honest, helpful and always willing to answer questions. His guidance has literally changed my life for the better!!

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August 24, 2025

5.0

He explains your condition to you. Give you all the Valarie information needed. He's up on my condition.

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August 23, 2025

5.0

He answers all your questions and knows what he's talking about.

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August 20, 2025

5.0

Dr. Papagiannis gave me excellent care. He not only evaluated my tests and concerns thoughtfully, he also helped me understand what was going on with my thyroid. After assessing my tests, he welcomed my questions about another medical concern I have. I thought he offered a very grounded and practical perspective on symptoms that I have been struggling to get diagnosed. While it is still unclear what is causing these symptoms, after talking with him I feel confident that there are good pathways forward_both to rule out endocrinological causes and also to evaluate for other possible causes. He is a great doctor and communicator! I consider myself very privileged to receive care at Northwestern because of physicians like Dr. Papagiannis.

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July 18, 2025

5.0

Very knowledgeable and prepared professional.

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July 16, 2025

5.0

Dr Papagiannis is amazing....he's a very friendly no nonsense Dr.....If you do what he suggests at least in my case he has made me way way healthier than the first day I walked in his door...

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July 13, 2025

5.0

He Was Very Thorough With the Present And everything needed To Continue until next year

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July 09, 2025

5.0

He's great at showing you he cares and is concerned about your health.

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July 04, 2025

5.0

Excellent doctor with deep expertise.

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July 03, 2025

5.0

Excellent Doctor, great care.

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June 30, 2025

5.0

Dr. P actively listens and appears to care about how I'm responding (or not) to medication level adjustments.

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June 27, 2025

4.0

Dr. Papagiannis was very friendly

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June 19, 2025

5.0

Dr Papagiannis

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June 19, 2025

5.0

Dr. Papagiannis is excellent on all levels and I feel fortunate to have him on my care team.

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June 18, 2025

5.0

Excellent professional, very knowledgeable and able to easily explain the case and the questions asked. He is also very kind and helpful.

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June 17, 2025

5.0

He listens carefully and provides thoughtful and precise answers. He is extremely sensitive and very informative.

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June 17, 2025

5.0

Great patient service and professionalism.

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June 17, 2025

5.0

He's carefully and great professional. I'm blessed

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June 09, 2025

5.0

He is a provider that follows through with your care.

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June 04, 2025

5.0

I am able to ask any questions and participate in my care. Dr. Papagiannis cares about patients and is up to date on the research on my care.

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June 02, 2025

5.0

Knowledgeable of my particular issue. Attentive, personable and caring.

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May 31, 2025

5.0

He is kind, explains everything. His RN Naheem is professional and kind.

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May 30, 2025

5.0

He is providing an excellent service for patients

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May 29, 2025

5.0

Dr Papagiannis listens to his patients and their concerns as well as answering their questions. He is thorough and covers all bases with the exceptional care of an Endocrinologist and doctor.

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May 28, 2025

5.0

Dr. Papagiannis is the best. He understands my issues and listens to me regarding my concerns. He has a great bedside manner and I'm glad he is my doctor.

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May 27, 2025

5.0

He listens to his patients. Band end explains your concerns and codition

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May 27, 2025

5.0

Kind, patient, knowledgeable, took time.

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May 23, 2025

5.0

I saw Dr. Papagiannis today for a thyroid biopsy, and I couldn't have asked for a better experience. From the moment he walked in, he completely put me at ease. He was thorough, friendly, caring, and incredibly reassuring throughout the entire procedure. It's clear he takes the time to connect with his patients and make sure they feel informed and comfortable. I'm truly grateful for his excellent care _ he's an outstanding doctor and I highly recommend him!

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May 22, 2025

5.0

Awesome Dr!!!!

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Disclosures

Industry Relationships

Consulting

Faculty member and/or their immediate family have engaged in activities such as speaking, advising, consulting, or providing educational programs for the following companies or other entities

Amgen, Inc.
Viridian Therapeutics, Inc.

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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Dissecting Thyroid Disorders

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7 Facts About Your Thyroid

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