Meet the 22 Health Team

All 22 Health doctors are certified by the Florida Board of Chiropractic Medicine, adult and pediatric trained, and take continual education seminars to stay up with the latest in chiropractic research. Rest assured that you are in great hands with 22 Health’s team of dedicated professionals. Each of our doctors strive to give you the best personalized care. Walk in anytime, or call to make your same-day appointment. Open 6 days-a-week, and all locations are open until 7pm.

Operations Team

22 Health Supervising Chiropractor Christopher Usina

Christopher Usina

Owner / Chiropractor

22 Health Brian Hyser Operations Team

Brian Hyser

Co-Founder / Director of Marketing

22 Health Andrew Panepinto Director of Operations

Andrew Panepinto

Director of Operations

22 Health Kristina Tabbara Compliance Director

Kristina Tabbara

Director of Administration

Chiropractic Orange City FL Cheslea Jones Billing Manager

Chelsea Jones

Billing Manager

Marketing Team

Chiropractic Orange City FL Krista Raymer Marketing Manager

Krista Raymer

Dustin Huffman, DC

Chiropractor Orlando FL Dustin HuffmanDr. Huffman was born and raised in rural West Virginia. Prior to studying to become a Chiropractor, Dr. Huffman graduated with a Bachelor of Science Degree in Biology from Concord University in West Virginia. He attended the prestigious Palmer College of Chiropractic Florida Campus, graduating with his Doctor of Chiropractic Degree in 2014. Dr. Huffman is a family Chiropractor, treating people of all ages from children to the elderly. He enjoys working with his patients to improve their health, vitality, and overall wellness. In his free time, he is an avid musician, he enjoys spending time with his German Shepherd, and volunteering as a member of the U.S. Coast Guard Auxiliary.

Roger A Walker, DO

Roger WalkerDr. Roger A. Walker is a Board-Eligible Orthopedic surgeon. He received his Bachelor of Science degree from Florida Atlantic University (FAU) College of Engineering. He was a member of the Varsity FAU baseball team and was selected in the Major League baseball draft. While practicing as a professional engineer, he obtained a Master of Science in Mechanical Engineering from FAU. He then pursued his medical degree at Nova Southeastern University. His orthopedic surgery training was performed at the level one trauma center, Broward Health Medical Center, in Fort Lauderdale, Florida. He continued his training at Orlando Health Medical Center, completing a fellowship in Orthopedic Surgery Sports Medicine.

Dr. Walker specializes in shoulder, elbow, hip, and knee injuries. Taking a holistic approach to the patient, the goal of his practice is to develop a targeted patient-specific treatment plan for their injury. He promotes patient education and understanding of their injury and rehabilitation. A targeted non-operative plan gets most patients back to health. However, some patients require additional interventions. He is fellowship-trained in orthopedic surgery sports medicine, utilizing minimally invasive arthroscopic surgical procedures. These procedures implement advanced techniques to preserve cartilage, reconstruct ligaments, and repair tendons to preserve native joint longevity and performance.

Dr. Walker practices General Orthopedic Surgery encompassing the following:

  • Adult & Adolescent Care
  • Outpatient and Inpatient (Hospitalized) Care
  • Fracture management in the Upper and Lower Extremities
  • Shoulder, Elbow, Wrist, Hip, Knee, and Ankle Pain: Non-Operative and Operative Management
  • Joint Replacement (Arthroplasty) of the Hip and Knee
  • Arthroscopy of the Shoulder, Hip, and Knee
  • Neck and Back Pain: Non-Operative Management
  • Team Coverage

Chiropractic Orlando FL Eilliam RIvera Front Desk Receptionist

Eilliam Rivera

Front Desk Receptionist

Halle Fuentes, LMT

Massage Therapist


Chiropractor Orange City FL Stephanie KernDr. Kern is a proud Central Florida local and a second generation Chiropractic Physician. She graduated from Palmer College of Chiropractic in Port Orange, FL. She graduated with additional training in soft tissue mobilization techniques, kinesiology taping, and low force spinal manipulation techniques. She loves giving back to her community by volunteering at community events and putting on educational seminars. In her down time, she enjoys power lifting, swimming, and traveling.

Chiropractic Orange City FL Ashley Bartholomew Massage Therapist

Ashley Bartholomew

Massage Therapist

Heidi Velez

Front Desk Receptionist


Chiropractor Atlamonte Springs FL Roberto CarrionDr. Roberto Carrion is originally from Kissimmee Florida, obtaining his bachelor’s degree in science at The University of Central Florida, specializing in sports & exercise science and graduated with his Doctorates at Palmer College of Chiropractic Florida

Dr. Carrion has always had a humble heart to serve and care for others since he was young, volunteering for diverse entities and charities such as Habitat for Humanity and Give Hands to the World among others.

Growing up he was blessed with many talents in sports and performing arts, from playing basketball to musical theater. He competed in Latin & Ballroom dancing as well as being a member of the all-male acapella group while at UCF.

Since very young Dr. Carrion has witnessed the needs of people and the personal satisfaction reward of helping them. Coming from a family of attorneys, he knew he had a calling to help others, not in the legal but in the health field.

He is passionate for teaching others about medicine, science and corrective care and to help patients reach their optimal level in health and performance.

In Dr. Carrion’s free time he loves to enjoy being with his family and friends, camping, weightlifting, playing guitar and keeping up with the latest video games.

Dr. Carrion ultimate goal is to educate others on the philosophy, science treatment and benefits of chiropractic care, promoting the well-being and health of patients.

Chiropractic Altamonte Springs FL Cynthia Morales

Cynthia Morales

Front Desk Receptionist

Chiropractic Altamonte Springs FL Jasmine Morrell Massage Therapist

Jasmine Morrell, LMT

Massage Therapist


Chiropractor Altamonte Springs FL Pamela SawyerA graduate of Palmer College of Chiropractic, Dr. Pamela Sawyer came to chiropractic through the suggestion of her husband. She graduated from Eastern Washington University in 2010 Cum Laude. She is whole body oriented treating all ages from birth to elderly. Dr. Sawyer performs: manual adjustments using diversified, Thompson drop as well as some Gonstead techniques. Soft tissue therapies using adhesion breakers for scars, deeper scar tissue, muscle spasms; stretching and exercises. In her free time, she enjoys painting and sewing, going out and playing with her son, husband and cats and traveling around the world either to visit friends, family or charity work.

Jennifer Limberis

Front Desk Receptionist