About Us

David S. Rosen, MD, FAANS

Chief Medical Officer / Neurosurgeon

Dr. David Rosen is a board-certified neurosurgeon recognized for his expertise in the treatment of traumatic injuries of the brain and spine and degenerative diseases of the spine. With a career defined by clinical excellence, leadership, and dedication to patient care, he is one of Central Florida’s most experienced and trusted neurosurgeons.

Dr. Rosen maintains Central Florida’s largest neurosurgery practice. He has performed more than 10,000 neurosurgical procedures, treating patients with conditions ranging from traumatic brain injury and spinal cord trauma to complex degenerative disorders of the cervical, thoracic, and lumbar spine. His practice emphasizes thoughtful diagnosis, evidence-based surgical decision making, and individualized treatment plans designed to restore function and improve quality of life.

Advanced surgical technologies, including robotic spine surgery, computer-assisted brain and spine surgery, neuromodulation, and minimally invasive neurosurgical techniques, are foundational components of Dr. Rosen’s practice. These techniques often allow for smaller incisions, less postoperative pain, shorter hospital stays, and faster recovery for patients. Dr. Rosen is Florida’s most experienced minimally invasive robotic spine surgeon- reflecting a commitment to innovative surgical techniques and dedication to the most effective and least invasive treatments available.

Dr. Rosen is deeply committed to providing emergency neurosurgical care. With over 25,000 hours of emergency neurosurgical care experience, he remains actively involved in emergency neurosurgical care at the largest hospital in the United States, providing care for patients suffering from life-threatening brain and spine injuries. His work on the front lines of trauma care forged his deep expertise in managing complex and urgent neurological conditions.

A respected leader from the earliest days of his career, before his 40th birthday, Dr. Rosen became Chairman of Neurosurgery for Florida’s largest neurosurgery department. At that time, he was the nation’s youngest Chairman of Neurosurgery at a U.S. News & World Report Top 25 Neurology & Neurosurgery Program. He has continued to serve in this leadership role for more than a decade, guiding the department’s clinical growth, mentoring neurosurgeons, and advancing the quality of neurosurgical care throughout the region.

Dr. Rosen completed his undergraduate education at Indiana University. He went on to earn his medical degree from the University of Chicago Pritzker School of Medicine. He remained at the University of Chicago Medical Center to complete his residency in Neurological Surgery. Dr. Rosen completed additional advanced training in the treatment of brain and spine tumors at the M.D. Anderson Cancer Center in Houston.

Today, Dr. Rosen combines decades of surgical experience with a compassionate, patient-centered approach to care. He believes that the best outcomes come from careful listening, clear communication, and collaboration with patients and their families. His goal is to provide Central Florida’s safest and most effective neurosurgical treatment.

Donald L. Behrmann, MD, PhD

Neurosurgeon

Dr. Behrmann is board certified in Neurosurgery by the American Board of Neurological Surgery. He received his medical degree from Indiana University and served his internship at Indiana University School of Medicine. He completed his neurosurgery residency and received his Ph.D. in Neuroscience from The Ohio State University.

Dr. Behrmann’s areas of specialization include minimally invasive surgical techniques, spinal disorders with instrumentation and tumors of the central nervous system. He is a Gamma Knife certified neurosurgeon.

Dr. Behrmann is a member of the American Association of Neurological Surgeons, the Congress of Neurological Surgeons, the Neurotrauma Society and served as Chairman for the Department of Neurosurgery at Florida Hospital from 2009-2017.

Paul F. Shuler, MD

Orthopedic & Sports Medicine Surgeon

Dr. Shuler provides patient focused Orthopedic and Sports Medicine care for patients in Central Florida. His lifelong philosophy is that if something is worth doing, it is worth doing right and he combines it with the Golden Rule.

Dr. Shuler is board certified in both Surgical Sports Medicine and General Orthopedic Surgery with a focus on joint replacement, arthroscopy, hand, and upper and lower extremity surgery. He derives great satisfaction from being able to improve other people’s lives by helping them overcome a broad spectrum of orthopedic conditions.

Dr. Shuler received his Board Certification in Orthopedic Surgery in 2003 and his additional Board Certification in Orthopedic Sports Medicine in 2010. He has been a member of the Arthroscopy Association of North America (AANA) since 1998 and completed an AANA mini-fellowship in Shoulder Arthroscopy. Dr. Shuler has utilized his training and experience to educate medical and physicians’ assistant students, and instruct operating room personnel in the use of Orthopedic instruments and techniques.

For 13 years prior to coming to Central Florida in 2013, Dr. Shuler was in practice in Wisconsin. He and his wife have enjoyed continuing to raise their 4 children in the Ocoee / Winter Garden area.

When he is not with his family or enjoying his favorite activities: waterskiing, swimming, biking, and camping, Dr. Shuler can be found “tinkering” and fixing things.

Dr. Shuler grew up with an appreciation for orthopedics stemming from first-hand experience during his childhood. Though he ultimately returned to his childhood interest in Orthopedics, he once wandered down a different career path. Dr. Shuler graduated Summa Cum Laude from Michigan Technological University with a degree in Electrical Engineering. Having been awarded a scholarship from General Motors, he worked for them during college and after graduation performing advanced product development and systems applications engineering.
In 1992 he returned to Michigan State University College of Human Medicine to obtain a M.D. and subsequently completed an affiliated General Surgical Internship and Orthopedic Surgical Residency.

Thomas N. Cooper, MD

Anesthesiology & Interventional Pain Management

Dr. Cooper is Board Certified in Anesthesiology and Interventional Pain Management. He received his Medical Degree from St. Georges University School of Medicine and served his internship at Lakenau Hospital in Wynnewood, Pennsylvania. He completed his Anesthesiology Residency at the University of Pennsylvania. Dr. Cooper’s areas of specialization are lumbar, thoracic and cervical epidurals, caudal epidurals, sacroiliac injections, lumbar facet blocks, radiofrequency ablations and occipital nerve blocks.

Dr. Cooper is a member of the American Society of Anesthesiologists, Florida Society of Anesthesiologists and American Society of Interventional Pain Physicians. He has served on the Board of Directors at Orlando Anesthesia Consultants and from 2012-2013, 2014-2017. Dr. Cooper was Chief of Staff at Health Central Hospital.

Terel Newton, MD

Anesthesiology & Interventional Pain Management.

On the national level, Dr. Newton is an advocate and educator on alternatives to opioids for patients with acute and chronic pain. He has trained at multiple level one trauma centers, not limited to UNC, Duke, George Washington, University of Vermont, University of Maryland Baltimore County. Additionally, he is board-certified in Anesthesiology and has completed continuing medical education at Harvard University and multiple other institutions throughout the country. He completed his residency in Anesthesiology at the University of North Carolina and an interventional pain fellowship at the University of Vermont.

He has held several teaching positions throughout his career, and serves as a medical director for one of the largest medical cannabis organizations in the country. Dr Newton has performed thousands of patient consultations and interventional procedures for spine and joint injuries, post-traumatic headaches, and a variety of other pain conditions. Languages: Primarily English and proficient in Spanish.

Jay Wright, MD

Anesthesiology & Interventional Pain Management

Integrity Medical Group is proud to welcome Dr. Wright to our practice, bringing 25 years of dedicated pain management experience to patients across Central Florida.

Dr. Wright earned his undergraduate degree in mechanical engineering from Southern Methodist University in Dallas, Texas, before completing his medical degree at the University of Texas Medical School in Houston. He then pursued his residency in physical medicine and rehabilitation at the University of Texas Southwestern Medical Center, where he served as chief resident. Board certified by both the American Board of Physical Medicine and Rehabilitation and the American Board of Pain Medicine, Dr. Wright has earned widespread recognition for his clinical excellence. His distinctions include being named a Castle Connolly Regional Top Doctor from 2014 to 2025 and an Orlando Family Magazine Top Physician in 2019.

Outside of his clinical practice, Dr. Wright values time with his family and is an accomplished saltwater fly fisherman who holds four IGFA world records. In addition, he enjoys the thrill of snowboarding in the winter and staying active at the gym.

Thomas Koehne, PA-C

Tom is a board certified Physician Assistant and a graduate of the University of Florida. He has 30 years of experience as a Physician Assistant, all of which have been dedicated to the field of neurosurgery. For the past 11 years, he has specialized in neurosurgery with a focus on personal injury cases, helping patients navigate complex neurological conditions and injuries with expertise, compassion, and individualized care.

As a founding member of Integrity Medical Group, Tom is committed to providing exceptional patient care and advocating for the best possible outcomes for those he treats. His extensive experience and dedication to his patients have made him a trusted provider in the field of neurosurgery.

Outside of his professional responsibilities, Tom enjoys spending time with his family. He and his wife share a love of travel and enjoy exploring the outdoors through activities such as biking, hiking, and kayaking. A lifelong animal lover, he has owned dogs for most of his life. Today, however, much of his attention is devoted to his “wife’s” energetic five-pound poodle.
Tom believes that developing meaningful relationships with patients is an important part of the healing process and considers it a privilege to help individuals on their journey toward recovery and improved quality of life.

Jacob Phillips, PA-C

Jacob Phillips graduated Magna Cum Laude from Tennessee Technological University in 2006 with a Bachelor of Science in Biology and a concentration in Health Sciences, and subsequently earned a Master of Science in Medicine from Trevecca Nazarene University in 2010. He has maintained certification through the National Commission on Certification of Physician Assistants (NCCPA) since January 2011 and has practiced exclusively in the specialty of neurosurgery since that time.

Throughout his career, he has remained committed to providing compassionate, evidence-based care with an unwavering focus on the well-being of each patient. His clinical philosophy is founded on placing the patient's best interests first, practicing with integrity, and ensuring that every decision reflects the highest standards of professionalism and ethical care.

Outside of clinical practice, he enjoys karaoke and values the opportunity to spend time with his family in Tennessee.

Mary Cameron, PA-C

Mary Cameron is a board-certified physician assistant with a diverse clinical background in orthopedics, neurosurgery, and pain management. She holds a Bachelor of Science in Physical Education (non-teaching degree) from the University of Idaho. Go Vandals!! During her time there she worked in the athletic training room, primarily with the football team but also volleyball, basketball and track. She earned her Master of Medical Science degree in Physician Assistant Studies from Wake Forest University in North Carolina. She is a member of the Florida Academy of Physician Assistants.

Outside of the clinic, Mary is an amazing dog mom and an avid Disney fan. She enjoys traveling, music, college football, and volunteers in her local community.

Melissa Collins, APRN

Melissa Collins worked as a Neuro ICU Registered Nurse for 13 years and loved the fast-paced atmosphere. As times changed, she craved a change of pace and graduated in 2020 from Frontier Nursing University with her Family Practice APRN degree. Since then, she has worked in Family Medicine, Neurosurgery, and Pain Management. She maintains her certification through the American Academy of Nurse Practitioners (AANP) and has a deep passion for prioritizing patients and advocating for them in every way possible.

Outside of practicing as a Neurosurgical APRN, Melissa enjoys learning new things and challenging herself with new medical practices. She loves the outdoors—especially any activity involving water—spending time with her family, and cooking delicious, healthy foods. She has a Chiweenie dog named River, whom she loves to the moon and back, as animals speak right to her heart and she loves being around them.

Rafael Romero, PA-C

Rafael Romero is a Certified Physician Assistant with over 18 years of experience and a diverse background in general adult and pediatric orthopedics, orthopedic spine surgery, and neurosurgery. Throughout his career, he has first assisted in a wide range of orthopedic and spine procedures, including acute orthopedic trauma, arthroscopic surgery, joint replacement, spinal deformity correction, and complex spinal fusion procedures. This broad surgical experience has provided him with the knowledge and expertise to deliver comprehensive, patient-centered orthopedic care.

His philosophy in orthopedic care is to treat people, not just injuries. He believes every patient deserves compassionate, individualized care and to be actively involved in their treatment through education and open communication.

The most rewarding part of his work is helping patients regain their mobility, independence, and quality of life. Whether recovering from an injury or managing a chronic condition, his goal is to relieve pain, restore function, and help each patient return to the activities that matter most to them. He strives to provide the best care with empathy, knowing that improving someone’s ability to live a fulfilling life is the greatest measure of success.

Outside of work, Rafael enjoys spending time with his family and friends, traveling to new destinations, relaxing at the beach, and staying active outdoors. He also has an interest in specialty coffee and craft cocktails, enjoying the process of refining his barista and mixology skills. He believes maintaining a healthy work-life balance allows him to bring energy, focus, and compassion to the care he provides his patients.