Marc D. Posner, MD

Marc D. Posner, MD

5.0 
360 ratings  Read Reviews
Northwestern Medicine logoNorthwestern Medical Group

Primary Specialty

Radiation Oncology

Is your insurance accepted? Select plan

CALL
Practice Website

Practice Focus Areas

This medical professional has a particular interest or expertise in:

Education

Medical Education:
MD, Harvard Medical School - 1995
Internship:
University of Chicago - 1995
Residency:
University of California (San Francisco) - 2000

Board Certifications

  • American Board of Radiology - Radiation Oncology (Certified)

Faculty Profile

Clinical Assistant Professor, Feinberg School of Medicine

View Faculty Profile

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

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

5.0
5.0 

360 Ratings

Sort By Newest

Reviews from Patients

46 Reviews

Reviews from Patients

Sort By Newest
46 Reviews

April 27, 2025

5.0

He obviously knows his stuff but comes across as a friend would when discussing issues. He took plenty of time with me and my wife and was prepared to spend even more, but we had covered all issues before he was called away by a nurse. Personable, completely relatable.

Was this helpful? Yes (1) No (0)

Thanks for your feedback!

April 25, 2025

5.0

Because he is very smart and very knowledgeable. He cars for his patients

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

Thanks for your feedback!

April 17, 2025

5.0

Dr. Posner is very informative when I first spoken to him back in January. I'm no longer under radiation treatments. But I'm very grateful on the great work Dr. Posner has done. So I would highly recommend him if anyone should ask me.

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

Thanks for your feedback!

April 17, 2025

5.0

Great doctor...very knowledgeable

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

Thanks for your feedback!

April 09, 2025

5.0

Took a long time to explain my options and answering my questions

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

Thanks for your feedback!

April 07, 2025

5.0

Thorough, pleasant, down to earth, highly knowledgeable, relatable, honest

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

Thanks for your feedback!

March 20, 2025

5.0

Very warm and caring person. Terrific credentials perhaps the best I have seen. Takes time to explain in detail his plan for medical procedures. Very knowledgeable with many years of experience.

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

Thanks for your feedback!

March 16, 2025

5.0

Dr. Posner is bright, confident and compassionate; and he communicates information in a concise and reassuring way for patients. He is patient and takes the time to listen and answer any patient questions/concerns. Highly recommend.

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

Thanks for your feedback!

March 15, 2025

5.0

He takes care of my husband who has had prostate cancer and he is a very competent physician. I had a consult and he very clearly and concisely explained everything in a calm manner which put me right at ease.

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

Thanks for your feedback!

March 14, 2025

5.0

With his knowledge and expertise and his going through the different scenarios one can feel very reassured to make the right decisions in getting the treatment.

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

Thanks for your feedback!

February 21, 2025

5.0

Very friendly and knowledgeable. Answered all questions and encouraged any further conversation

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

Thanks for your feedback!

February 15, 2025

5.0

He was very thorough in explaining everything. His knowledge of my situation made it less stressful for me to deal with the treatments I have ahead. He answered all my questions with honesty and compassion for what I am going through! I feel he looks at each patient individually and designs a treatment for their specific needs. I am very fortunate to have this doctor on my Cancer team!

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

Thanks for your feedback!

February 14, 2025

5.0

Informative and empathetic without condescension. Robust sense of humor an added plus to a slightly anxious patient.

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

Thanks for your feedback!

February 14, 2025

5.0

Excellent intelligent physician

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

Thanks for your feedback!

February 14, 2025

5.0

Dr. Posner and his team are caring, knowledgeable and open to a discussion. They provided excellent insight and provided information I deemed important in making an important decision.

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

Thanks for your feedback!

February 14, 2025

5.0

Explains everything very clearly.

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

Thanks for your feedback!

January 18, 2025

5.0

Great connection with patient

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

Thanks for your feedback!

January 17, 2025

5.0

He is Great. Took all the time needed to explain everything in detail. Made me feel very comfortable. Along with his nurse Debbie, I know I am in the best hands for my treatment.

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

Thanks for your feedback!

January 14, 2025

5.0

Dr. Posner inspires confidence in his patients because of his competency and straightforward manner.

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

Thanks for your feedback!

December 24, 2024

5.0

Answered all my questions

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

Thanks for your feedback!

December 24, 2024

5.0

EXPLAINS FULLY.

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

Thanks for your feedback!

December 20, 2024

5.0

Very informative regarding my care

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

Thanks for your feedback!

December 18, 2024

5.0

Engaging, thoughtful, candid.

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

Thanks for your feedback!

December 17, 2024

5.0

Caring and knowledgeable professional.

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

Thanks for your feedback!

December 05, 2024

5.0

Explained in great detail the treatment plan. Made us relax.

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

Thanks for your feedback!

November 23, 2024

5.0

Knowledgeable and compassionate

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

Thanks for your feedback!

November 23, 2024

5.0

Always ready the explain what is happening and what we can do. Answers questions and never dismisses my concerns.

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

Thanks for your feedback!

November 19, 2024

5.0

Our conversation with the Dr about the radiation treatment was excellent, took his time and explained in a matter that we understood and even spoke about other topics not related like if we were long time patients or friends

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

Thanks for your feedback!

November 18, 2024

5.0

Dr. Posnar was generous with his time and his medical knowledge. I enjoyed his humor and his obvious experience. He spoke plainly and by doing so his expertise shone through.

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

Thanks for your feedback!

November 15, 2024

5.0

Very professional.

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

Thanks for your feedback!

November 09, 2024

5.0

Very friendly, thoughtful, courteous and responsive

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

Thanks for your feedback!

November 07, 2024

5.0

staff and doctor very professional and knowledgeable.

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

Thanks for your feedback!

November 07, 2024

5.0

Kind, thorough and informative.

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

Thanks for your feedback!

November 07, 2024

5.0

Excellent Communicator excellent Diagnostics and recommendations

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

Thanks for your feedback!

November 06, 2024

5.0

Dr Posner was so open and easy to talk to. He explained what the next steps would be in my treatment. He answered my questions about risk and benefits. I Especially appreciated that I did not feel rushed and he was willing to stay as long as I wanted to discuss my care. At the end of our meeting, I told him I was glad that he was a member of my team.

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

Thanks for your feedback!

November 06, 2024

5.0

He is so knowledgeable and kind.

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

Thanks for your feedback!

November 04, 2024

5.0

I felt a connection with what he was saying.

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

Thanks for your feedback!

October 26, 2024

5.0

He has such a positive attitude. He makes the patient feel like everything is going to be ok. As a cancer patient, you want someone like him working on your behalf.

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

Thanks for your feedback!

September 25, 2024

5.0

Personable, knowledgeable and experienced

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

Thanks for your feedback!

September 23, 2024

5.0

Dr Posner was well spoken, and included in various options to my care. I was comfortable and at ease when I left.

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

Thanks for your feedback!

September 20, 2024

5.0

One of the best most authentic meetings with doctor ever!

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

Thanks for your feedback!

September 18, 2024

5.0

Best dr

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

Thanks for your feedback!

September 14, 2024

5.0

Warm, friendly doctor.

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

Thanks for your feedback!

September 14, 2024

5.0

I really appreciate the time spent explaining everything! Very focused on me and very caring.

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

Thanks for your feedback!

September 13, 2024

5.0

warm and professional

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

Thanks for your feedback!

September 12, 2024

5.0

Great meeting and gave us a thorough understanding of our options

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

Thanks for your feedback!
View more reviews

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

  • Elekta

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