About Jeffrey Trimark, MD

Jeffrey Trimark, MD, an internal medicine physician at Endeavor Health, treats a wide range of adult conditions and serves as a medical informaticist supporting primary care physicians. In addition to patient care, he designs and optimizes Epic workflows that improve efficiency and enhance the physician-patient relationship. Dr. Trimark values thorough communication and ensures patients feel heard, understood and informed during every visit.

My endeavor

My endeavor is to try and help primary care doctors thrive in a very challenging health care system by giving both providers and patients the support they need.

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Care philosophy

I create time and space for patients to be understood. I walk through everything they want addressed and explain clearly what needs to happen next. At every visit, I balance their concerns with what I know they need and make sure they leave with answers.

Overview

  • Gender Male
Endeavor Health Medical Group
915 S. Waukegan Rd.
Lake Forest, IL 60045-2654
(847) 234-8866 Get directions
Medical School
  • 1992
    Internal Medicine
    University of Chicago - Pritzker School of Medicine
Residencies
  • 1997
    Internal Medicine
    Naval Medical Center, San Diego
Professional Education
  • 2017
    Northwestern University Graduate School
Board certifications
  • 1997
    Internal Medicine
    American Board of Internal Medicine
4.8
(134)
Learn more about ratings
Reviews (49)
January 30, 2026
Very Good
January 30, 2026
Dr Trimark addresses all of my health concerns and provides great advice.
January 29, 2026
Dr. Trimark was excellent at listening to my recent medical issue and scheduling the necessary imaging regarding my concerns. He also communicated with my cardiologist about my status. I greatly appreciated the time and consideration he gave me during my appointment.
January 28, 2026
Dr. Trimark was thorough in answering all of my questions and concerns.
No rating
January 20, 2026
Dr. Trimark is amazing. Explains everything and takes time to do it.
January 7, 2026
Dr. TRIMARK is very thorough and meticulous in his medical practice!
January 4, 2026
Provided a lot of good information
January 2, 2026
Dr. Trimark immediately responds to portal questions.
December 31, 2025
Impressed by Dr Trimark's analysis and attention to detail and medical history.
December 11, 2025
Dr. TRIMARK is very thorough and meticulous when working with his patients. He is an exceptional MD!
December 5, 2025
Professional, efficient, knowledgeable.
November 14, 2025
Showed care and concern about my medical issues. Signed me up for additional care for a chronic issue that needs monitoring. Advised me to fill out a health directive so that my end of life options were documented. He went above and beyond to help me resolve my health concerns and deal with my anxiety . I am very thankful!!
November 3, 2025
Easy to talk to. Listened intently to what I was saying and asked questions
October 31, 2025
Best I have encountered in last 10 years. Puts you at ease. Doesn't rush. Explains any issues well.
October 17, 2025
The staff and doctor were great.
No rating
October 13, 2025
He is very good doctor
September 28, 2025
Dr Trimark was very thorough and competent. He addressed my pre op concerns well.
August 30, 2025
Dr. Trimark is amazing.
August 30, 2025
Dr Trimark is wonderful kind and caring
August 20, 2025
Very collaborative attitude. Very knowledgeable about many topics
August 2, 2025
Exceptional Doctor! Kindness, caring, knowledge, and listening to my concerns.Thankful for such an amazing Doctor!To my concerns.
August 2, 2025
I was impressed, with how prepared he was, to discuss my wellness. This was my first visit with Dr. Trimark and I am so happy to have found him. I am confident in his care.
July 30, 2025
Lovely, very kind Dr Trimark!! Many thanks for your efforts to help me feel better!!
July 17, 2025
Dr. Trimark was great, he took his time, asked me questions and gave me great advice. I'm pleased to have him as a Primary doctor.
July 15, 2025
I really appreciate how quickly I was able to get in and see a doctor yesterday.Dr. Trimark Is an excellent doctor and his recommendations were spot on.
July 11, 2025
Dr. Trimark was incredible! Really took the time to ask me about any concerns
June 23, 2025
Excellent Doctor who always answers my questions. The best!
June 10, 2025
Dr. TRIMARK is very thorough and meticulous in his medical practice. He also has an excellent bedside manner!
June 10, 2025
He did an excellent job.
May 23, 2025
Dr. TRIMARK is the best doctor I've ever had in all my 71 years, He's so warm,spends so much time with me and he really knows his stuff. I'm so happy that I found him
May 7, 2025
Competent, asked on-target questions, provided well considered and appropriate input
May 1, 2025
DR. TRIMARK IS VERY THOROUGH IN HIS APPROACH TO HIS MEDICAL PRACTICE!
April 10, 2025
Dr. Trimark is a very kind and thoughtful care provider. I'd recommend him to anyone.
March 27, 2025
Dr Trimark and his team did an excellent job making me feel comfortable and providing pragmatic care to get my health journey back on track
March 16, 2025
Best PCP in NorthShore. Finally a doctor that is able to spend time with their patients despite the current healthcare model. NorthShore makes it impossible to develop a relationship with your doctor due to scheduling and demands on practitioners but Dr Trimark makes the most of it and the effort is clearly noted.
March 6, 2025
Dr Trimark was knowledgeable, professional courteous and had a very real way about him. Will recommend him to anyone
February 19, 2025
Great staff and Dr.
February 18, 2025
Dr. Trimark is a very kind and understanding gentleman.
February 12, 2025
Great doctor.
January 30, 2025
Pleased
January 28, 2025
Dr. Trimark is an exceptional doctor and I'm very happy to have found him and hope to be his patient for many years to come. 5 Stars!
January 24, 2025
This was my first appointment with Dr. Trimark. He had definitely reviewed my file before I met with him. He talked with me about my health issues and listened carefully to my concerns.
January 21, 2025
Very good communication skills,
January 17, 2025
Dr Trimark listened and helped me work through some different problems and dilemmas I had. He looked back on my record so we could make informed decisions.
January 14, 2025
Very good
January 12, 2025
Outstanding physician!
January 7, 2025
I absolutely LOVE Dr. Trimark! I've had many doctors in the past and he's by far the kindest, most knowledgeable and brilliant doctor Ive ever had. He never rushes through my appointments with me, he's totally empathetic to my physical and mental health and Id recommend him to anyone!!!
January 6, 2025
Wonderful! He made me feel very comfortable and well taken care of.
No rating
January 3, 2025
VERY thorough and professional
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