MEDICAL TEAM
David Buechner, M.D
Chief Executive Officer and medical director
David Buechner, MD, is a skilled clinician and radiologist with specialized expertise in neurointerventional radiology, neuroradiology, peripheral vascular interventional radiology, and interventional pain management. He is highly experienced in addressing injuries from personal injury cases, providing precise diagnoses and tailored treatments for patients facing complex trauma and pain. His professional affiliations include Keystone Medical Group, Traumatic Brain Institute of America, Paragon Medical Group, Paragon Imaging, St. Jude Children’s Research Hospital, and Indiana University College of Medicine. He also reads for several local imaging centers.
David Buechner, MD, is highly specialized in reading MRI Diffusion Tensor Imaging (DTI) for traumatic brain injury (TBI) assessments, collaborating with local imaging centers to provide precise insights into brain injuries. His expertise in DTI allows him to interpret the subtle brain changes often associated with TBI, ensuring accurate diagnostic support for personal injury cases and enhancing care coordination for affected patients.
In addition to his clinical work, Dr. Buechner leads a research team conducting a clinical trial using regenerative medicine to advance therapeutic options for TBI. This pioneering trial focuses on developing innovative, targeted approaches to TBI therapy, aiming to significantly improve patient outcomes and further the understanding of regenerative medicine’s role in TBI recovery.
His background includes a fellowship in Neuroradiology/Neuroendovascular Radiology at the University of Arkansas for Medical Sciences, a residency in Radiology, and an internship in Transitional Medicine at Methodist Hospital Memphis. He holds an MD from the University of Tennessee College of Medicine and a Bachelor of Science in Biology from Christian Brothers University. Dr. Buechner is board-certified by the American Board of Radiology with a Certificate of Added Qualification (CAQ) in Neuroradiology.
Anna Lillig, PA-C
pHYSICIAN ASSISTANT
Since joining Keystone Medical Group in July 2024, Anna has specialized in concussion and post- concussion management as well as musculoskeletal injuries resulting from car accidents personal injuries and work-related injuries. She combines her clinical expertise with a compassionate approach working closely with multidisciplinary teams to developed individualized treatment plants tailored to each patient’s unique needs.
Before joining Keystone Medical Group, Anna specialized as a physician assistant in orthopedics and skilled nursing facilities. She has provided comprehensive support in both surgical and outpatient settings, ensuring patients receive thorough evaluation, diagnosis, and treatment for both acute and chronic orthopedic conditions. Through her involvement in skilled nursing facilities, she has contributed significantly to patient recovery and medical management.
Anna is committed to staying current with the latest advancements in orthopedic and concussion care, ensuring her patients receive the highest quality treatment. Known for her patient centered approach, she educates and supports patients throughout the recovery journey, advocating for the best possible outcomes and making a positive impact on the lives she serves.
Cindy Lamb, LCSW, CCTP
Therapist
Cindy Lamb is a Certified Clinical Trauma Professional, therapist, and mental health consultant with over 20 years of experience. Through her work with Keystone Medical Group, she provides comprehensive mental health assessments and therapy services for clients navigating the emotional impact of personal injury.
Cindy understands that recovery involves more than physical healing, it also requires addressing the mind and emotions. Personal injury often brings emotional distress, anxiety, depression, or trauma responses that can hinder healing and daily functioning. She specializes in helping clients work through these challenges, building resilience, restoring a sense of safety, and regaining stability in daily life.
Her approach blends evidence-based trauma therapy with compassionate, individualized care, ensuring each client receives support to recover mind, body, and spirit. By addressing both psychological and physical dimensions of recovery, Cindy ensures the whole person is acknowledged and supported during these sudden and difficult chapters.
Cindy is also the founder of the Human Liberation & Balance Institute, where she develops healing-centered tools and programs that integrate neuroscience, trauma recovery, and systems thinking to support both personal and collective transformation.
Delphine Nkweti, LMSW
Therapist
Joining our team in September 2025, Delphine brings advanced training in traumatic brain injury (TBI) and extensive experience working with patients recovering from complex trauma. She provides expert assessment and diagnosis, identifying the cognitive, emotional, and psychosocial impacts of injury to create individualized plans that support recovery and overall well-being.
Delphine has worked in a variety of clinical and community settings, including mobile crisis response, forensic case management, and behavioral health programs, where she provided crisis intervention, safety planning, and therapy for individuals facing trauma and mental health challenges. Her approach emphasizes evidence-based care, collaboration with healthcare teams, and patient-centered strategies to help individuals navigate recovery from TBI and trauma-related conditions.
At Keystone Medical Group, Delphine integrates her TBI expertise, trauma-informed approach, and diagnostic skills to provide compassionate, comprehensive care for patients across Kansas City, Lee’s Summit, Overland Park, and surrounding areas. Her focus on recovery, resilience, and long-term support ensures that patients receive the guidance and care they need to regain function and improve quality of life.
PHYSICAL THERAPY TEAM
Magali Valotto, PTA
physical therapist assistant
Magali is a skilled Physical Therapist Assistant at Keystone Medical Group, specializing in both musculoskeletal injury therapy and concussion rehabilitation. She works closely with patients recovering from auto accidents, sports injuries, and traumatic brain injuries, providing hands-on support to restore mobility, strength, balance, and overall function.
In her role, Magali collaborates with the therapy team to design individualized treatment plans tailored to each patient’s needs. Whether addressing muscle strains, joint injuries, post-concussion dizziness, or cognitive challenges after a TBI, her focus is on guiding patients through a safe and effective recovery process.
Beyond her clinical expertise, Magali helps ensure the smooth operation of the clinic, assisting with tasks that enhance the patient experience. Her dedication to compassionate, high-quality care makes her a valued member of the Keystone Medical Group team.
Alan Carson, PTA
Physical TherapisT assistant
Alan Carson, PTA, brings over 20 years of diverse experience in physical therapy, working across outpatient clinics, senior living facilities, and industrial health settings. Throughout his career, he has specialized in patient care, documentation, and staff and caregiver education, always focused on delivering high-quality treatment and support. His background includes orthopedic rehabilitation, post-hospital recovery, and workman’s compensation cases, making him well-versed in a wide range of therapeutic needs. Alan’s expertise in musculoskeletal and vestibular rehabilitation allows him to help patients improve balance, manage dizziness, and restore function after injury.
In addition to his clinical work, Alan has demonstrated a commitment to adaptability and teamwork, taking on roles in both full-time and PRN capacities to meet patient and facility needs. His dedication to patient outcomes and collaborative care has made him a respected and valuable member of every team he’s been part of. Alan earned his Associate of Science in Physical Therapist Assistant from Colby Community College, and he continues to apply his education and extensive experience to provide exceptional care at Keystone Medical Group.
MANAGEMENT & ADMINISTRATIVE TEAM
Lance Stevenson
Managing Director
With over 12 years of experience in the healthcare industry, Lance Stevenson has built a reputation for helping organizations grow and operate more effectively. As Managing Director and in previous leadership roles such as Clinic Director, Director of Operations, COO, and CFO, he has focused on business strategy, team development, and operational efficiency to achieve measurable success.
Lance has managed large-scale operations, overseeing everything from strategic planning and marketing to the daily management of teams and processes. He is highly skilled in recruiting, training, and developing staff, creating high-performing teams through targeted development programs that prioritize both individual growth and exceptional patient care. His expertise also extends to billing and records management, where he has implemented accurate, compliant, and efficient systems.
In his current role as Managing Director, Lance is passionate about driving business growth by developing strategies that expand market presence and build strong community relationships. Known for his ability to align teams and processes with organizational goals, he is dedicated to helping healthcare organizations succeed in an increasingly competitive landscape.
Josey Oregon
Administrative Assistant
Josey has over four years of experience in the personal injury field and is an essential member of the Keystone Medical Group team. She serves as the records custodian and brings expertise in billing, ensuring patient information is accurate, secure, and efficiently managed.
Her role spans multiple areas of the clinic. She assists at the front desk, supports clinical staff, and helps manage cases from start to finish. Her attention to detail, organizational skills, and dedication allow her to keep the clinic running smoothly while providing patients with a seamless experience.
Whether coordinating appointments, managing records, or supporting staff in daily operations, Josey’s versatility and commitment make her an invaluable part of Keystone Medical Group.