I was told by my doctor at IBJ that knee replacement was the only solution for my osteoarthritis (OA), and that stem cell therapy wouldn't work. After choosing Regenexx stem cell treatment with Dr. Tanbar, which was covered by my wife's insurance, the result has been remarkable. Recovery was slow, but six months later, I have achieved nearly 100% recovery and am now a firm believer in the treatment's value.

Really great experience with Dr Tambar today. He asked many questions, got a full history, offered confidence and clarity, and was open to all my questions and concerns. One of the best doctor’s experiences I’ve had in recent memory. I really appreciate him and his office!

First rheumatologist I’ve ever been to in my life, but I feel like I stuck gold. Dr. Tambar and team have provided me with some of the best patient experiences of any doctor I’ve been to. They really do a great job.

Dr. Tambar is an exceptional rheumatologist who truly goes above and beyond for his patients. From the moment I stepped into his office, I felt welcomed and cared for. He takes the time to listen attentively, explains everything thoroughly, and ensures that all my questions are answered about my RA diagnosis. His knowledge and expertise are evident, and he genuinely cares about providing the best possible treatment. The office staff is also friendly and efficient, making the entire experience seamless. I highly recommend Dr. Tambar to anyone looking for a compassionate and skilled doctor. Thank you!

If you have RA - and the body/mind changes that come with it - this is the place you should be. Dr Tambar is calm and a true listener. My visits with him have never felt rushed. He takes time to understand what you are feeling - physically, mentally and emotionally. He is holistic in his approach but combines this with the latest medical treatments. I am now going through a new and painful shoulder episode which my medical doctors have been scrambling unsuccessfully to treat. He has pinpointed and targeted this accurately - but more than that, he has understood where I am in this pain journey. If you need help from a true listener and inovative healer, I would give him a try. 🙏

The entire team is excellent. Dr. Tambar takes the time to explain a treatment plan, makes sure you are comfortable with the plan and executes the plan with great care and explanation including follow-up to cover questions and provide any other necessary information. The office is extremely organized and clean and nurses, P.A. and others make you feel cared for and at ease. Consistent follow-up with Dr. Tambar post procedure has been outstanding allowing ample time to discuss progress and to have any questions answered. Treatment of my left knee has seen remarkable improvement.

Professional. Kind. The aspiration was very comfortable. Dr Tambar and staff put me at ease. Alyssa and Grace were awesome. Made time to answer my questions and concerns regarding my procedure and prognosis.

Dr. Tambar takes care to provide personal attention, plenty of time for all questions, And thoroughly get to the bottom of what's going on. He is a kind and generous doctor.

I can’t express enough how grateful I am to be under the care of Dr Tambar and his whole staff. Each one of them is just amazing. From Dr Tambar and his patience to listen to my symptoms and complaints and run every test possible to get to the bottom of the underlying issues.Leah for her compassion and willingness to always find a solution to help sooth and minimize my pain. David at front desk so caring and welcoming. Alyssa so polite and respectful, Shayla with her beautiful smile and sweet voice when she explains the different type of procedures offered at the clinic, Grace with her charm and Sparkle and her ability to make a little sour moment into an amazing time spent there. Over all the whole Chicago Arthritis Team is just outstanding they do and they will go above and beyond. I’m so happy I found them. They have done more for me in one year than any other place I’ve been. Thank you all so very much! Corina Lopez.

Dr. Tambar's expertise in stem cell therapy has truly transformed my life. Suffering from stiff, achy arthritic knees was a constant battle until I sought his care. From the moment I stepped into his office, I was met with warmth and professionalism from Dr. Tambar and his team. The stem cell injections he administered to both knees provided immediate relief, a sensation I hadn't experienced in years. It's incredible how a single treatment could make such a significant difference. Not only did I find relief from the symptoms that had plagued me for so long, but I also regained a sense of mobility and freedom that I had feared was lost forever. Dr. Tambar's dedication to staying at the forefront of medical advancements is evident in his meticulous approach to treatment. He took the time to thoroughly explain the procedure, ensuring I felt comfortable and informed every step of the way. His passion for improving the lives of his patients shines through in his work, and I am deeply grateful for the care and expertise he provided. I wholeheartedly recommend Dr. Tambar to anyone seeking relief from joint pain or considering stem cell therapy. Thanks to his skill and compassion, I am now able to live my life to the fullest, free from the constraints of knee pain.

My husband seen Siddharth Tambar MD today. Our experience was great. He was very thorough, listened to all of our concerns and explained everything. We went thinking we were only doing a consultation and ended up getting treatment at this appointment. Very nice man and didn’t rush through the appointment. My husband felt very comfortable.

I have been seeing Dr. Tambar for nearly a decade. I've observed him build his practice and cope with many business challenges; moving locations, covid, expansion of services, etc. He has managed these changes with great calm and always kept the care and followup for his patients as his top priority. He's very professional yet approachable and engaging. His staff is equally hard working and technically competent balanced with a sincere sense of care. I'm with him for the long haul... if lucky enough to keep him. Besides, anyone who likes hockey is centered.

I have been a patient of Dr. Tambar’s since February. I could not have chosen a better doctor to help me get through my illness. Whenever I call with a question or concern, Dr. Tambar gets back to me that day, or the next at the very latest. I appreciate his genuine concern, caring maner, accessibility and patience. Dr. Tambar is a credit to his profession and I would highly recommend him. And, a shout out to Cam, who is very efficient and courteous.

I’ve been a patient of Dr. Tambar’s for some time and have recently observed a notable improvement in the coordination with the front office staff. They are now more friendly and clearly dedicated to providing the best care for patients. Dr. Tambar himself is an attentive listener, skillfully balancing my long-term care needs while promptly addressing acute inflammatory flares with effective short-term pain relief. This positive change in the office environment and the consistent quality of care from Dr. Tambar have significantly enhanced my overall experience.

I’ve had the best experience with Dr Tambar! He has treated my arthritis in my thumbs and my carpal tunel issues. After three months I am thrilled. I’m looking forward to getting back shoulders repaired next. I’m a huge believer in Chicago Arthritis and Mobility!

Dr. Tambar and staff are AMAZING! Everyone is organized and friendly. Dr. Tambar spent lots of time with me and was so kind and thorough. He is an expert and a lovely man. I feel so lucky to have found him!

I highly recommend Chicago Arthritis. Dr Tambar has the quiet confidence you see in doctors that know they are able to really assess and treat systemic issues (in my case knee and lower back). The results of the Regenexx process have exceeded my expectations. The staff is kind, personable, and professional. No downtime for recovery.

I had a fabulous experience at this office for my treatment! The team represents among the highest levels of customer service I have experienced. From Dr. Tambar to his entire staff, from begining to end of the process. The whole staff is really informed and go the extra mile at every stage. I would recommend them completely!

Everyone at Chicago Arthritis were great - very professional and very friendly. The PA's interview was thorough. Dr. Tambar was very pleasant and approachable - easy to discuss my issue with. He was thorough too - asked pertinent questions, and made sure I understood that the tests he was ordering would help with diagnosing my issue. He did an Ultra Sound on my wrist in the examining room, and he took the time to explain to me what we were seeing. In the followup visit, he explained what the test results indicated, and recommended treatment for my condition. At no time did I feel that he was in a rush to see the next patient, like I often felt with the many specialists I saw for my condition. I am extremely impressed by the service I received on both my visits. I highly recommend Dr. Tambar.

Great appointment, and since it was a zoom call it saved me having to hobble to the office with a bum knee! Dr. Tambar is kind, gentle, and most of all, knowledgeable. He have me valuable advice and a few tips regarding what to do next. I'm forever grateful he was able to squeeze need in before a long trip, too.