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.
Dr. Buechner’s dedication to patient care has earned him numerous recognitions, including as one of America’s “Best Doctors” in Neurointerventional Radiology and among Memphis’s “Top Doctors.” Memphis Magazine has repeatedly named him one of the “Best Doctors” in Neuroradiology/Neurointerventional Radiology.
Anna Lillig, PA-C
pHYSICIAN ASSISTANT
As a Physician Assistant, Anna specializes in orthopedic injuries, leveraging her extensive experience in treating trauma patients. In previous roles, she has offered comprehensive support in both surgical and outpatient settings, ensuring that patients receive thorough evaluation, diagnosis, and treatment for acute and chronic orthopedic conditions. Her expertise extends to performing various office procedures such as injections, aspirations, and suturing, all aimed at facilitating the healing process for injured individuals.
Having worked closely with trauma inpatients across multiple clinics, she understands the complexities involved in managing orthopedic injuries. Her commitment to patient care is evident in her collaborative approach with multidisciplinary teams, ensuring that every patient receives tailored treatment plans for their specific needs. Beyond her clinical expertise, she is dedicated to staying abreast of the latest advancements in orthopedic care, continuously refining her skills to provide the highest quality of treatment to her patients.
As a key member of Keystone Medical Group, she is known for her compassionate approach to patient care, ensuring that individuals feel supported and informed. Whether it’s educating patients about their condition, collaborating with other healthcare professionals, or advocating for the best possible outcomes, she is committed to making a positive impact on the lives of those she serves.
Erik Hansen, PT
Physical Therapist
Erik Hansen is a highly skilled and dedicated licensed physical therapist with many years of experience in injury rehabilitation, specializing in both auto accident and workers’ compensation cases. As the leader of our physical therapy team at Keystone Medical Group, Erik provides expert guidance and support to ensure each patient’s recovery process is as effective and personalized as possible. He is particularly renowned for his skill in evaluations, including comprehensive concussion assessments, which are critical in addressing the full range of symptoms and complications that can result from head injuries.
Erik’s deep understanding of musculoskeletal injuries allows him to develop individualized therapy programs that target pain relief, mobility restoration, and functional strength rebuilding. His approach combines advanced therapeutic techniques with a compassionate, patient-centered focus, ensuring each individual feels supported and empowered throughout their rehabilitation. Whether treating whiplash, vertigo, or complex work-related injuries, Erik aims to optimize each patient’s ability to regain their quality of life. Erik’s dedication to patient care and his extensive experience make him a trusted and invaluable member of the Keystone Medical Group, where he continues to positively impact the lives of those he serves.
Stephane Ahart, PTA
Physical Therapist Assistant
Stephane Ahart, PTA, is a dedicated Physical Therapist Assistant at Keystone Medical Group, specializing in musculoskeletal injury therapy. He works closely with patients who have been injured in auto accidents, providing hands-on support to help them regain mobility, strength, and function.
In his role, Stephane collaborates with the physical therapy team to develop individualized treatment plans for each patient. Whether it’s addressing muscle strains, joint injuries, or balance issues, his goal is to ensure that patients progress through their recovery effectively and safely.
Beyond his therapy expertise, Stephane contributes to the overall smooth operation of the clinic, assisting with various tasks to enhance the patient experience. His commitment to delivering high-quality care makes him an essential part 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 TEAM
Lance Stevenson
Managing Director
With over 10 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.
Karla Maudsley
Director of Case Management
Karla Maudsley brings over 12 years of invaluable experience to her role as Director of Case Management, where she expertly leads our team in managing personal injury cases with efficiency and precision. Karla’s expertise ensures that our case management processes run smoothly, focusing on strategic planning, resource allocation, and performance optimization.
As Director of Case Management, Karla and her team play a crucial role in reaching out to new patients, getting them scheduled, and ensuring that intake paperwork and claim information are completed accurately and promptly. From the initial contact to resolution, Karla ensures that every aspect of case management is handled with the utmost care.
Her leadership fosters a culture of collaboration and innovation, empowering our team to deliver exceptional service to our clients. With Karla at the forefront, our team is equipped to navigate the challenges of personal injury cases with confidence, ensuring our clients receive the best possible outcomes. Her unwavering dedication and extensive expertise make her an invaluable asset to our organization, driving us forward in our mission to provide exceptional care and service.
Mark Wallace
Director of Growth & Development
Mark Wallace brings a wealth of experience to the realm of personal injury, having dedicated many years to the field. As the Director of Growth and Development at Keystone Medical Group, Mark plays a crucial role in steering the organization towards success. In this capacity, he is responsible for identifying opportunities for expansion and innovation within the group.
Mark spearheads initiatives to enhance service offerings, forge strategic partnerships, and expand Keystone’s reach, all with the goal of providing exceptional care for clients. Alongside his role at Keystone, Mark continues to contribute his expertise at Paragon Medical Group in Memphis, TN, where he has demonstrated his prowess in leadership, strategy, and management. This experience equips him with a nuanced understanding of the challenges and opportunities inherent in personal injury cases.
Mark’s visionary leadership and strategic acumen are instrumental in shaping Keystone’s trajectory, ensuring that the organization remains at the forefront of the personal injury landscape, poised for continued success. His dedication to growth and development makes him an invaluable asset to the team, driving Keystone Medical Group forward in its mission to provide exceptional care and service.
Administrative Team
Josey Oregon
Administrative Assistant