Meet Our Team


Atlanta Hyperbaric Oxygen Therapy Physicians:
Richard W. King, Jr., MD, FAAPMR, CWS, UHM – Medical Director
Marianne Taryla, MD, FACEP, FCCWS, UHM
Ahmed Yousef, PT, Ph.D, ESC
Reita King – President and Chief Financial Officer

Cami Young, RN, BSN, CHRN – Clinical Supervisor
Stephanie Feller, RN, BSN, CWON – Lead Registered Nurse
Shane McKinnon, EMT-P, CHT, A-DMT – Technical and Safety Director
Hunter Dowling, EMT, CPR, Senior Hyperbaric Technician
Beverly Champagne – Administrative Coordinator
Holly Messenger – Front Office Administrator
Carrin Carlisle – Administrative Service Supervisor
Becca Kasten, RN, BSN, CHRN – Registered Nurse

Richard W. King, Jr., MD, HyOx Medical DirectorRichard W. King, Jr., MD, FAAPMR, CWS, UHM – Medical Director

Combining a career in medicine and an avid interest in scuba diving led Dr. King to pursue his dream of developing a major Atlanta hyperbaric medicine facility in 1999. As medical director, Dr. King is responsible for evaluating patients for hyperbaric oxygen therapy, directing patient care and supervising HyOx Medical Treatment Center’s medical staff.

He has earned numerous accolades and awards for his patient care and medical expertise.  US News & World Report’s rated Dr. King as among the “Top One Percent in the Nation” in his specialty in 2011 and 2012.  Since 2005, he’s consistently earned Atlanta Magazine’s bi-annual designation as one of Atlanta’s “Top Doctors” in a poll of medical peers.

Dr. King is an expert in hyperbaric medicine and one of several hundred physicians nationwide board certified in Undersea and Hyperbaric Medicine. He was first trained in hyperbaric medicine more than 20 years ago as a flight surgeon in the United States Air Force and continues to research new treatment innovations in rehabilitative medicine. Dr. King is a frequent presenter at medical conferences spanning numerous medical specialty areas that regularly use hyperbaric oxygen therapy as an adjunct treatment.

A native of Miami, Florida, Dr. King has spent much of his career in Atlanta. He graduated from Emory University’s School of Medicine and completed his specialty training at Emory’s Center for Rehabilitation Medicine, serving as chief resident in his final year.

In addition to hyperbaric medicine, Dr. King has extensive experience in the rehabilitation of wounds, strokes, amputations, head injuries and spinal cord injuries. Prior positions include medical director of HealthSouth Rehabilitation Hospital in Sarasota, Florida and WellStar Cobb Hospital Rehabilitation Unit.

Dr. King is double board certified in Physical Medicine and Rehabilitation and Undersea and Hyperbaric Medicine. The Certified Wound Specialist is a member of the American Medical Association, Medical Association of Georgia, Cobb County Medical Society, American Academy of Physical Medicine and Rehabilitation, Undersea and Hyperbaric Medical Society, American Academy of Wound Management, American Academy of Disability Evaluating Physicians, and American Academy of Pain Medicine. Dr. King also is an assistant clinical professor of rehabilitation medicine at Emory University School of Medicine.

Dr. King and his family reside in Marietta.



Marianne Taryla, MDMarianne Taryla, MD, FACEP, FCCWS, UHM

Dr. Taryla joined the HyOx Medical Treatment Center team in May 2012.   Board certified in Emergency Medicine and Undersea and Hyperbaric Medicine, the Douglasville, GA native provides her clinical expertise and care to patients at both HyOx facilities.

She is a familiar name in hyperbaric medicine in Metro Atlanta, having administered hyperbaric oxygen therapy in facilities on the campus of  WellStar Kennestone Hospital and Emory University Hospital Midtown.

Dr. Taryla earned her two undergraduate degrees at Georgia Institute of Technology (1982) and Oxford College of Emory University (1980) where she received numerous honors and awards.  She graduated from The Medical College of Georgia in 1987 and completed her residency in Emergency Medicine in 1990 at Emory University.   Her special interest in wound care and limb salvage led her to pursue board certification in the sub-specialty of Undersea and Hyperbaric Medicine in 2003.

She is a fellow of the American College of Emergency Physicians and the College of Certified Wound Specialists and a member of the Undersea and Hyperbaric Medical Society and Divers Alert Network.

Dr. Taryla and her husband, another practicing hyperbaric physician, live in Douglasville and enjoy hiking, photography and walking in the woods with their dogs.


Ahmed Yousef, PT, Ph.D, ESCAhmed Yousef, PT, Ph.D, ESC

Dr. Yousef recently joined our practice to assist in providing physical therapy and electromyography tests. He moved from Egypt to the United States in 1982 in response to a national shortage of physical therapists during the 1980’s. He was picked up by a private jet from Kennedy Airport in NYC and flown to Warton, Texas for his first position in America. He had his own private practice in Macon, GA for 28 years and also served as staff and Director in many physical therapy settings including hospitals, home healthcare, and private practices in America and Egypt. Dr. Yousef’s specialties are evaluating and treating clients with spine, temporomandibular and extremity joint pain and disorders, and electrophysiology and nerve conduction testing. Continuing education is something he believes one can never have enough of, therefore he is always finding himself back in the classroom to pursue more knowledge to enhance himself and stay updated thereby giving his patients the best care possible. In his spare time, Dr. Yousef enjoys writing socioreligion articles for newspapers. Dr. Yousef is an author of two published books; The Brotherhood in Islam, Message to the Jews, Christians and Muslim and Islam Within Judaism and Christianity, A Voice From the Past. He has been a guest speaker at churches, synagogues and interfaith conferences. Dr. Yousef has a wife, three grown children and two grandchildren.


Reita KingReita King – President and Chief Financial Officer

After years of research and discussion about opening a specialty rehabilitation center Reita King relocated from Sarasota, Florida with her husband, Dr. Richard King to start HyOx Medical Treatment Center. She played an integral role in selecting the site and securing the initial financing for the comprehensive outpatient rehabilitation center.

In addition to overseeing the finance and billing department, Reita is credited with building a highly skilled medical and office team. Believing patient satisfaction extends beyond the medical treatment patients receive; Reita recruited a team that serves patient needs in a professional and compassionate way. Her leadership in this patient-centered philosophy sets HyOx apart from other medical facilities.

Reita earned a Bachelor of Science degree from the Georgia Institute of Technology. After graduation, she was a math teacher in Lithia Springs, Georgia for three years and then became a programmer analyst for Lockheed Martin in Marietta. Dr. King’s stint in the United States Air Force took them to Okinawa, Japan and Eglin Air Force Base in Florida.

After the military, Dr. King and Reita moved to Sarasota where she took a professional hiatus to take on a more than full-time job raising four children. She was actively involved in volunteerism using her financial expertise as treasurer of the Sarasota County Medical Auxiliary and of her children’s school. Her fundraising efforts helped the school raise more than $400,000 in one night.

Her dream of coming back to her hometown of Marietta was realized when HyOx joined Metro Atlanta’s medical community in 1999.


Cami Young, RN, BSN, CHRN – Clinical Supervisor

Cami coordinates all administrative and clinical aspects of patient care at the HyOx Gwinnett location.  As an Intensive Care Unit (ICU) nurse for more than 20 years, Cami’s equipped with the necessary clinical and relational skills to care for HyOx patients and help ensure coordination and continuity of care is achieved.   Cami received Certified Hyperbaric Registered Nurse designation (CHRN) in June 2013.

The Alabama native assists the hyperbaric medicine physicians with inpatient and outpatient care and collaboratively works with wound care centers, referring physicians, nurses, care coordinators, case managers, and other medical team members to help achieve the best possible patient outcomes.

Prior to joining HyOx in March 2012, Cami worked in the Neuro/Trauma ICU unit of the University of Alabama at Birmingham (UAB) Hospital. She also cared for medically fragile patients at the Lewisville Medical Center in Texas and the Washoe Medical Center in Reno, NV. Cami received her nursing degree from the Lurleen B. Wallace School of Nursing at Jacksonville State University in Jacksonville, AL.

Cami and her husband, Mike, live in Suwanee, GA and have three children, Blayne, Ethan and Keelan, and pets, Blackie the cat and Ginger the dog. Her “happy places” are the Destin – Grayton Beach, FL area enjoying the sand and sun and wherever her kids are competing in their sporting events. She loves to talk about travel and her latest read over a Starbucks Caramel Frappuccino® with whipped cream.


Stephanie Feller, RN, BSN, CWON – Lead Registered Nurse

Stephanie is a northern transplant, originally from Central Pennsylvania. She moved to Metro Atlanta from Ohio in 2015. Since moving here she has been embracing (and loving) life as a Georgia Peach. She earned her Associate’s Degree in Nursing at Shawnee State in Southern Ohio, her Bachelor’s Degree in Nursing at Kent State in Ohio, and received specialized training and certification in wound and ostomy care through Metropolitan State in St. Paul, Minnesota and the University of Pittsburgh Medical Center. When she moved to Georgia, she played an integral role in opening a wound care and hyperbaric center and has brought her valuable knowledge and experience to HyOx. Stephanie doesn’t love traditional exercise but thoroughly enjoys being active with Pure Barre Kennesaw (fun fact: she is a member of their 500 Club!). She loves going to local festivals, exploring new areas and hanging out with her family and friends.



Shane McKinnonShane McKinnon, EMT-P, CHT, A-DMT – Technical and Safety Director

Shane McKinnon brings a wealth of experience in diving medicine and chamber operations/maintenance to his role as HyOx Medical Treatment Center’s technical and safety director. He has more than 15 years of experience in medicine through the Army, military and recreational diving and emergency medical services.

Shane oversees technical operations and maintenance of HyOx’s multi-patient chamber and ensures appropriate safety measures are carried out in HyOx’s patient care processes. Shane also is directly involved in patient care and regularly accompanies patients on “dives.” Prior to joining HyOx in 2001, Shane was a paramedic with Grady Health System’s emergency medical services.

The Atlanta native is a certified Georgia EMT-Paramedic, a certified hyperbaric technologist and an associate member of the Undersea and Hyperbaric Medical Society. Shane is an avid scuba diver and enjoys adventure sports including mountain biking and skydiving.


Hunter Dowling, EMT, CPR – Senior Hyperbaric Technician

After serving four years as an Army combat medic, Hunter Dowling worked as a non-commissioned officer in charge at the Dwight D. Eisenhower Army Medical Center’s Hyperbaric & Wound Care Clinic in Augusta, GA.  The Braselton, GA native joined the HyOx team in September 2015 and resides near Braselton, GA after living in an array of cities with his military career including Columbus, GA, San Antonio, TX, Colorado Springs, CO, and a tour of duty for a year in Afghanistan in 2010. Hunter is a highly decorated veteran having earned a combat medical badge, three Army achievement medals, three Army commendation medals, and a non-commissioned officer professional development ribbon.


Hunter enjoys life outdoors fishing, hunting, camping, hiking, enjoying lake life, and cheering for the home state teams – the Dawgs, Braves and Falcons.  The avid sportsman played on the gridiron as a semi-professional football player with the North Georgia Gladiators after his Army service.  Now, the emergency medical and hyperbaric technician is honored to serve HyOx patients by building relationships with them and helping them regain hope through healing.



Beverly Champagne – Administrative Coordinator, HyOx Gwinnett

Bev joined the HyOx team in the summer of 2013 to manage front office duties including coordinating patient appointments and preparing medical records and reports.  Working on the front lines for HyOx enables Bev to build personal relationships with HyOx patients and encourage them throughout the treatment process.

Prior to HyOx, the Boston native worked with an Atlanta-based oncology group which strengthened her ability to coordinate the myriad tasks involved in coordinating physicians’ schedules and providing personalized patient care.

Bev enjoys gardening, taking long walks at the park, talking to her sisters, hanging out with friends on her deck, shopping and playing with her cat, Frankie, at her home in Lilburn. She also enjoys spending time with her two children, Chase and Devin.




Holly Messenger – Front Office Administrator

Once you enter through the HyOx Medicdal Treatment Center door, there’s a great chance you’ll encounter Holly. She not only brings expertise to her role as HyOx’s administrative coordinator, she brings a service-oriented disposition and a friendly smile. As the liaison between patients and the HyOx clinical and financial teams, Holly helps ensure there’s effective communication and patient satisfaction during a patient’s treatment regimen. She’s responsible for all aspects of front office management including providing primary phone coverage, scheduling patient appointments and maintaining office equipment and supplies.

Holly is a native of Atlanta, Georgia. She has two brothers, one older and one younger. Her father being from Havana, Cuba and mother an Atlanta native, she enjoys getting to know about the cultures of those she meets. During her career Holly has gained a variety of experience as a customer service manager leading teams for several high profile retailers. She enjoys running her own successful business as well. Holly enjoys hiking, swimming, dancing, singing and performing, listening to and making music, decorating, traveling, spending time with her two children, her husband and friends.



Carrin Carlisle – Administrative Service Supervisor

Carrin is an important addition to the HyOx team. Her main objective every day here is to ensure that patients are able to receive the treatment they need to get back to their lives and take the stress of insurance paperwork away from the patient. When she is not in the office, she enjoys spending time with her family, reading, cooking and creating lifelong memories through travel.



Becca Kasten, RN, BSN, CHRN – Registered Nurse

Becca’s background spans the full spectrum of clinical care settings.  Prior to joining HyOx in August 2010, Becca served as an operating room staff nurse at the Naab Road Surgery Center in Indianapolis, IN, a management consultant for Johnson & Johnson Health Care Systems in Michigan and the administrator for Surgical Care Affiliates/HealthSouth at its Florence, AL and Gainesville, GA-based surgery center where she directed nursing care and all other related activities from education to environmental control.

She received Certified Hyperbaric Registered Nurse with Distinction status from the National Board of Diving & Hyperbaric Medical Technology in September 2012. Fresh out of Alabama’s Capstone School of Nursing in 1991, Becca honed her leadership and nursing skills as the Urology Team Leader, Operating Room at UAB Hospital in Birmingham, AL managing personnel schedules, developing training materials and serving as trauma coordinator and relief charge nurse.

Becca is an active member of the Baromedical Nurses Association and the Wound, Ostomy & Continence Nurses Society.

Becca and her husband reside in Lawrenceville with their two sons and two dogs. She spends most of her weekday nights and weekends cheering for her boys during baseball, soccer, football, and basketball season.  When she’s not jockeying sports schedules year-round, she enjoys exercising, reading suspense novels and watching Alabama football.