Thomas Riley, MD
Orthopedic Surgeon
325 Cypress Pkwy
Kissimmee, FL 34759
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19 providers
Availability last updated 09/09/2025
Thomas Riley, MD
Orthopedic Surgeon
325 Cypress Pkwy
Kissimmee, FL 34759
Mark Nicholas Perenich, DO, is an accomplished, board-certified orthopedic spine surgeon at the Spine Institute of Florida, formerly Tampa Back Institute, with locations in Crystal River, Dade City, Spring Hill, and Tampa, Florida.
Specializing in minimally invasive spine surgery techniques, Dr. Perenich obtained his medical degree from the Philadelphia College of Osteopathic Medicine in Pennsylvania. Later, he completed his residency in Orthopedic Surgery at the Largo Medical Center in Florida. He then completed a fellowship in Spine Surgery at the prestigious Texas Back Institute.
Dr. Perenich is passionate about treating patients with spine-related conditions and is dedicated to providing the highest quality of care. He is known for his expertise in minimally invasive techniques, which help to reduce pain, minimize scarring, and shorten recovery times.
A member of several professional organizations, including the AOA Board of Orthopedic Surgery and the American Osteopathic Association, Dr. Perenich has authored several publications and presentations related to spine surgery and is committed to staying at the forefront of advancements in his field.
When not in the operating room, Dr. Perenich enjoys spending time with his family, traveling, and participating in outdoor activities such as wake surfing and boating.
Dr. Mark Perenich, DO
Orthopedic Surgeon
36739 County Rd. 52
Suite 103
Dade City, FL 33525
Ashley Perenich is a highly skilled Physician Assistant at the Spine Institute of Florida, where she works closely with Dr. Nicholas Perenich and the rest of the surgical team to provide exceptional care to patients. Ashley earned her Master of Medical Science in Physician Assistant Studies from University of South Florida’s Morsani College of Medicine and has since specialized in orthopedics and spine surgery.
As a Physician Assistant, Ashley is responsible for performing physical exams, diagnosing and treating injuries and illnesses, ordering and interpreting diagnostic tests, and assisting in surgical procedures. She is passionate about helping patients understand their condition and treatment options, and works closely with them to develop personalized treatment plans that meet their unique needs.
Ashley is a member of several professional organizations, including the Florida Academy of Physician Assistants and the American Academy of Physician Assistants. She is committed to staying up-to-date on the latest advancements in her field through continuing education and attending conferences and seminars.
In her free time, Ashley enjoys traveling, yoga, wakesurfing, and spending time with her husband, Dr. Nicholas Perenich, and their family.
Mrs. Ashley Perenich, PA-C
Orthopedic Surgeon
36739 County Rd. 52
Suite 103
Dade City, FL 33525
Dr. Donald Vliegenthart, MD
Orthopedic Surgeon
1736 33rd Street
Orlando, FL 32839
Joseph Perry, PA-C
Orthopedic Surgeon
1724 33rd Street, Suite 200
Orlando, FL 32839
Dr. Donald Vliegenthart, MD
Orthopedic Surgeon
9145 Narcoossee Rd Ste A200
Orlando, FL 32827
Joseph Perry, PA-C
Orthopedic Surgeon
9145 Narcoossee Rd Ste A200
Orlando, FL 32827
Mark Nicholas Perenich, DO, is an accomplished, board-certified orthopedic spine surgeon at the Spine Institute of Florida, formerly Tampa Back Institute, with locations in Crystal River, Dade City, Spring Hill, and Tampa, Florida.
Specializing in minimally invasive spine surgery techniques, Dr. Perenich obtained his medical degree from the Philadelphia College of Osteopathic Medicine in Pennsylvania. Later, he completed his residency in Orthopedic Surgery at the Largo Medical Center in Florida. He then completed a fellowship in Spine Surgery at the prestigious Texas Back Institute.
Dr. Perenich is passionate about treating patients with spine-related conditions and is dedicated to providing the highest quality of care. He is known for his expertise in minimally invasive techniques, which help to reduce pain, minimize scarring, and shorten recovery times.
A member of several professional organizations, including the AOA Board of Orthopedic Surgery and the American Osteopathic Association, Dr. Perenich has authored several publications and presentations related to spine surgery and is committed to staying at the forefront of advancements in his field.
When not in the operating room, Dr. Perenich enjoys spending time with his family, traveling, and participating in outdoor activities such as wake surfing and boating.
Dr. Mark Perenich, DO
Orthopedic Surgeon
100 W Gore St.
Orlando, FL 32806
Ashley Perenich is a highly skilled Physician Assistant at the Spine Institute of Florida, where she works closely with Dr. Nicholas Perenich and the rest of the surgical team to provide exceptional care to patients. Ashley earned her Master of Medical Science in Physician Assistant Studies from University of South Florida’s Morsani College of Medicine and has since specialized in orthopedics and spine surgery.
As a Physician Assistant, Ashley is responsible for performing physical exams, diagnosing and treating injuries and illnesses, ordering and interpreting diagnostic tests, and assisting in surgical procedures. She is passionate about helping patients understand their condition and treatment options, and works closely with them to develop personalized treatment plans that meet their unique needs.
Ashley is a member of several professional organizations, including the Florida Academy of Physician Assistants and the American Academy of Physician Assistants. She is committed to staying up-to-date on the latest advancements in her field through continuing education and attending conferences and seminars.
In her free time, Ashley enjoys traveling, yoga, wakesurfing, and spending time with her husband, Dr. Nicholas Perenich, and their family.
Mrs. Ashley Perenich, PA-C
Orthopedic Surgeon
100 W Gore St.
Orlando, FL 32806
As a trusted board-certified orthopedic surgeon, Fady A. Bahri, MD, FAAOS, has helped countless patients recover from sports injuries, workplace injuries, and chronic pain-causing conditions. Dr. Bahri cares for patients at Ortho One Jacksonville, a state-of-the-art orthopedic practice located in the heart of Jacksonville, Florida.
After graduating from the French Faculty of Medicine in Lebanon with his doctor of medicine degree, Dr. Bahri went through his internship and orthopedic surgery residency training. Because he excelled in his education and training, Dr. Bahri was accepted into a competitive orthopedic surgery fellowship program at the American Sports Medicine Institute in Birmingham Alabama.
During his fellowship, Dr. Bahri was guided by renowned sports medicine expert, James R. Andrews, MD. Dr. El-Bahri went on to become board certified by the American Board of Orthopaedic Surgery. He’s also a fellow of the American Academy of Orthopedic Surgeons.
While Dr. Bahri can diagnose and treat a wide variety of orthopedic issues, he has special interests in acute injuries and overuse injuries among athletes. Dr. Bahri regularly cares for all levels of athletes, from weekend warriors to professional athletes.
Fluent in Arabic, French, and English, Dr. Bahri enjoys conversing with patients from diverse cultural backgrounds. Patients of Dr. Bahri appreciate his dedication to them and their long-term health. He spends quality time helping patients recover from injuries, with a focus on returning to 100% performance.
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Dr. Fady El-Bahri, MD
Orthopedic Surgeon
201 Hilda Street
Suite 33
Kissimmee, FL 34741
George F. Bahri, D.O. is proud to serve medical and surgical orthopedic patients at Ortho One Jacksonville in Jacksonville, Florida. With an extensive amount of training in PRP, platelet-rich plasma, and stem cells, Dr. Bahri can provide orthopedic treatment using the latest cutting-edge technology for both adolescents and adult patients.
Dr. Bahri received his bachelor’s degree in biomedical sciences from the University of South Florida in Tampa, Florida, where he graduated top of his class. He then went on to complete his graduate degree in medicine at Nova Southeastern University College of Osteopathic Medicine in FT in Lauderdale, Florida; and orthopedic training at Largo Medical Center-NSU COM. He then continued his training under world renown sports medicine Orthopedic surgeon, Dr. James Andrews at the Andrews Research and Education Foundation/Andrews Institute in Pensacola, Florida.
With Dr. Andrews, Dr. Bahri has provided medical care to many professional athletes. He served as team doctor for a number of athletic teams including the Choctawhatchee High School football team and University of West Florida football team. He has provided medical care for the Division II Women’s National Volleyball Championship and the Ultimate Fight League in Tampa, Florida, and conducted pre-season physicals for the Tampa Rays major league baseball team.
His specialties lie in sports medicine injuries of the knee and shoulder with a special interest in shoulder and knee arthroscopy (ACL, rotator cuff, labrum, meniscus), Tommy John procedures, total shoulder replacements, total knee replacements, and general orthopedic care.
Dr. Bahri’s extensive education and experience has made him a vital team member to the practice. Call Ortho One Jacksonville or schedule an appointment online with Dr. Bahri today so he can help you find relief from your sports-related injuries.
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Dr. George El-Bahri, DO
Orthopedic Surgeon
201 Hilda Street
Suite 33
Kissimmee, FL 34741
Dr. Donald Vliegenthart, MD
Orthopedic Surgeon
4355 Bear Gully Road
Winter Park, FL 32792
Joseph Perry, PA-C
Orthopedic Surgeon
4355 Bear Gully Road
Winter Park, FL 32792
Joseph Perry, PA-C
Orthopedic Surgeon
652 Palm Springs Drive
Altamonte Springs, FL 32701
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