Advocate Condell Medical Center
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Meet our Care Team

Advocate Condell’s Orthopedic & Spine Institute consists of board-certified and fellowship-trained orthopedic and neurosurgical physicians who perform the most complex procedures. Our Orthopedic & Spine Institute physicians employ best-practice standards while achieving superior outcomes.

Each physician must meet our quality standards to be invited into Advocate Condell Orthopedic & Spine Institute. Our physician teams are continually evaluating and monitoring our quality indicators to make sure you are getting nothing but the very best.

For more quality information on our services, please contact: Paul Gave at 847.990.5555, or


Juan Alzate, MD

Dr. Alzate utilizes traditional and minimally invasive approach for spinal surgery and is internationally recognized in performing complex and minimally invasive endoscopic cranial-base surgery. “Using minimally invasive surgical technologies, we are able to reduce surgical complications and speed recovery with minimal scaring, where possible,” Dr. Alzate notes.

Read more about Dr. Alzate

Dr. Alzate believes in fully educating all patients on the surgical process and empowers them patients to make informed decisions regarding their treatment plan. Dr. Alzate earned a medical degree from the Universidad del Valle Medical School in Cali, Colombia, where he graduated with honors. He received training in neurosurgery at the Albert Einstein College of Medicine in New York City.

Previously, Dr. Alzate served as a research scholar at the Freie Universidad Berlin in Germany and at George Washington University in Washington, D.C. The focus of his research was on endoscopic surgery for the brain and spine. Dr. Alzate is fluent in Spanish.

Philosophy of Care: It is most important that patients are informed and comfortable with their surgical decision and treatment plan. Patients who are more informed regarding their treatment plan and associated risks have the right expectations, and are better poised for a speedy recovery.

Thomas Baier, MD
Orthopedic Surgery

Dr. Baier serves as the team physician for the Libertyville High School football team, as well as other local football and soccer teams. Dr. Baier has been practicing Orthopedic Surgery in Lake County since 1985, with a special focus on sports medicine and total joint reconstruction. He utilizes the “cementless total knee and total hips” and is certified in mini-incision hip replacement (MIS), and anterior hip replacement.

Read more about Dr. Baier

Dr. Baier is an expert in joint replacements, having performed hundreds of total and partial joint replacements. In 2012, Dr. Baier performed a double knee replacement on a 6’10” former college basketball player. Due to the new process at Condell, the patient started his rehabilitation the night of surgery and continued his rehabilitation at both a skilled nursing facility and then in outpatients. In 2013, the patient cycled 2,121 miles. His outcome was so successful because of the physician patient partnership.

Dr. Baier is a Lt. Colonel in the U.S. Army Reserves. In 2008, Dr. Baier completed a tour to Mosul, Iraq, during Operation Iraq Freedom (OIF). Then 2010, deployed to Afghanistan, FOB shank, during Operation Enduring Freedom (OEF) and again in 2012.

Philosophy of Care: I encourage each patient to take an active role in their treatment and medical decisions. I believe in exhausting all non-surgical means first, before recommending any surgical course of treatment.”

Click here to read about Dr. Baier’s double-knee replacement patient.

Gregory Caronis, MD
Orthopedic Surgery

Dr. Gregory Caronis is a board-certified, fellowship-trained orthopedic foot and ankle specialist who utilizes the most current methods to achieve the most successful outcomes. Dr. Caronis has a great interest in total ankle replacement, and has completed training in using the STAR and InBone total ankle replacements. Dr. Caronis is an expert in managing both adult and pediatric conditions of the foot and ankle, including: arthritis, deformities, chronic pain, diabetic foot deformities, flat feet, bunions, and neuromas.

Read more about Dr. Caronis

Another great interest of Dr. Caronis' is the treatment of fractures. He is often able to treat many of these without surgery, when he uses various casts or braces. When necessary, he is able to repair fractures using the most current surgical techniques and methods, using plates, rods, screws, external fixators, and bone stimulators. He performs minimally invasive fracture repair surgery.

Dr. Caronis is fluent in Greek.

Philosophy of Care: “I treat all of my patients with the same care and technical skill I would want for my own family.”

Jonathan Citow, MD

Dr. Jonathan Citow is internationally recognized for his innovation—the Citow Cervical Visualizer, which is a spinal device utilized worldwide. Currently, Dr. Citow is the chief of Neurosurgery at Advocate Condell Medical Center.

Read more about Dr. Citow

Dr. Citow achieved outstanding results in the most advanced treatment of many complex spinal disorders, and minimally invasive spinal surgery. He is also recognized for his treatment of many disorders of the brain and spine.

Dr. Citow has published numerous papers in peer-reviewed journals. He sits on the submission review board of the international journal Spinal Cord. Dr. Citow is a member of the Congress of Neurological Surgeons, as well as the American Association of Neurological Surgeons. He cares for both adult and pediatric neurosurgical patients.

With 17 years of experience, Dr. Citow is highly regarded by his patients who point to his bedside manners as “exceptional.”

Philosophy of Care: To provide the finest and most up-to-date neurosurgical care available.

Click here to watch a brief video of Dr. Citow discussing how to prevent concussions in student athletes.

Roger Collins, MD
Orthopedic Surgery

Dr. Collins specializes in sports medicine, arthroscopy, and shoulder surgery. His main focus is shoulder surgery, including shoulder reconstruction, shoulder replacement and arthroscopic rotator cuff repair. He is an expert in knee reconstruction, including arthroscopic ACL reconstruction.

Read more about Dr. Collins

Dr. Collins is an avid skier and hockey player. He was a collegiate athlete playing varsity ice hockey for the United States Air Force Academy. From this firsthand experience, Dr. Collins understands the athlete’s commitment to return to play, and works with each patient to achieve their goals.

Dr. Collins has been named one of the named as one of “America's Top Physicians” by the Consumer's Research Council of America and was recently selected as a candidate for the “Honors Edition” of Empire's Who's Who Among Executives and Professionals in Medicine and Healthcare.

Philosophy of Care: “I believe that compassion and understanding is as important in care of the patient as knowledge and surgical care.”

Sheri Dewan, MD

Dr. Dewan is a neurosurgeon with advanced training in complex spine disorders. Her special interests include brain tumors, complex spinal disorders including; degenerative disc disease, chiari malformation, and pituitary tumors. Dr. Dewan has received awards for her research on radiosurgery for brain tumors and performs radiosurgical procedures for spinal tumors as well.

Read more about Dr. Dewan

Dr. Dewan has lived in five countries, including South Korea and Saudi Arabia, and enjoys traveling, scuba diving and spending time with her husband and three children. Dr. Dewan served as chief resident to a busy clinical service including adults and pediatrics at Brown University. She also covered a Level I spine and neurotrauma center.

Dr. Dewan is fluent in Hindi

Robert Erickson, MD

Dr. Erickson focuses on complex and minimally invasive spinal surgery, cerebral aneurysms, brain and spine tumors, chiari malformations, trigeminal neuralgia and hydrocephalus. He has been recognized for his training of surgical residents and medical students for the past 19 years. Dr. Erickson cares for both adult and pediatric neurosurgical patients, and is a member of both the Congress of Neurological Surgeons and the American Association of Neurological Surgeons.

Read more about Dr. Erickson

Philosophy of Care: The patient will receive the highest level of care.

Charles Frank, MD
Orthopedic Surgery

Dr. Frank is a Board Certified Orthopedic Surgeon who, over his more than 30 years in practice, has treated a great range of musculoskeletal problems. He treats adults and children for general orthopedic needs. He has additional training and specializes in disorders of the hand and wrist, both operative and non-operative. This includes Carpal Tunnel Syndrome, nerve and tendon lacerations, arthritis, trigger fingers, fractures, plastic surgery on hands, and other injuries.

Read more about Dr. Frank

As an active member of the medical community, Dr. Frank teaches medical students and helps train surgical nurses and technicians. He is a member of the American Academy of Orthopedic Surgeons, and Lake County Medical Society. He has five children, and holds a commercial pilot’s license. Sports remain an important part of his life including tennis, swimming, roller blading, and yoga.

Philosophy of Care: My mission is to take care of any orthopedic issue and provide you with the answers to all of your questions.

John Mayer, MD
Orthopedic Surgery

Dr. Mayer is a fellowship-trained specialist in total joint replacement of the hip and knee, including difficult primary and revision cases. Dr. Mayer has been in practice since 1987 and has completed thousands of total joint replacements in his career. He is a member of the American Association of Hip and Knee Surgeons. Dr. Mayer is a member of Advocate Condell’s Joint Leadership Committee and sits on Advocate’s system- wide Orthopedic Specialty Service Line committee.

Read more about Dr. Mayer

Dr. Mayer incorporates the latest in orthopedic research and literature into his practice, while still relying on proven concepts and techniques. Dr. Mayer guides his patients through the decision making process and lends a realistic perspective to the vast amount of information that is often confusing for patients. He has co-authored several articles, and given numerous presentations in the field.

Dr. Mayer was raised in the Chicago area. He played college and professional soccer. He enjoys gardening, landscape design and architecture.

Philosophy of Care: I believe a physician should take the time to listen and address the individual needs of each patient, maintain the highest quality of technical skills, and use his experience and judgment to incorporate the newest techniques in an honest, realistic context.

Joseph Meis, MD
Orthopedic Surgery

Dr. Meis helped to create the total joint replacement program at Advocate Condell Medical Center, and has expertise in both the operative and non-operative treatment of arthritis, including minimal incision hip and knee replacement. Dr. Meis’ practice also involves caring for patients with knee injuries, including the arthroscopic treatment of ligament and cartilage injuries.

Read more about Dr. Meis

Dr. Meis has been a competitive cyclist for over 40 years. He is a former Illinois State Cycling Champion, and finished as high as third place at the Masters' National Track Bike Championships. He has been certified by the United States Cycling Federation as a level one coach. His experiences as an athlete have helped Dr. Meis meet the special needs of endurance athletes of all ages in his orthopedic practice.

Philosophy of Care: After being in practice for 30 years, we have learned the importance of treating the whole patient, not just the problem. Our team approach to medicine has proven to be the most successful technique over the years, while our success is demonstrated in the continued loyalty of our patients to the practice.

Mark Neault, MD
Orthopedic Surgery

Dr. Neault specializes in state-of-the-art arthroscopic surgical techniques, including shoulder reconstruction, knee reconstruction and hip and ankle arthroscopy. Other specialty operations include reconstruction of massive rotator cuff tears with biologic scaffolds, shoulder arthritis in patients of all ages, as well as minimally invasive techniques to treat tendon disorders.

Read more about Dr. Neault

Dr. Mark Neault serves as a team physician with local high schools and colleges. He completed his Orthopedic Surgery training at the University of Massachusetts Medical Center followed by a Sports Medicine Fellowship at the Minneapolis Sports Medical Center. There Dr. Neault served as a team physician for the Minnesota Twins, Timberwolves, Wild, Vikings and Gophers. He continues to serve as a consulting team physician for the Minnesota Twins, and cares for them when they are in town to play the Chicago White Sox.

Philosophy of Care: I want every patient to feel comfortable about their care plan and to know that every patient I treat will be treated as a family member.

Click here to watch a brief video of Dr. Neault talking about how to prevent sports injuries in young athletes.

Marcus Talerico, MD
Orthopedic Surgery

Dr. Talerico is a hand and upper extremity specialist who has had the privilege to serve as an orthopedic surgeon on active duty in the U.S. Navy. “Through this experience I came to better appreciate the concept of working as a member of a team. I have taken this approach with me to private practice. In both an outpatient and inpatient setting I serve as a leader of a team of people to obtain the best possible outcomes for our orthopedic patients.”

Read more about Dr. Talerico

Philosophy of Care: “I approach patient care like I do many things in life. I am an advocate of the simplest, most straight forward approach to obtain the best possible outcome. I work with my patients to develop the most sensible and effective treatment plan to address their problems through both non-operative and operative management.”

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