Our Team – Children's Orthopaedic and Scoliosis Surgery Associates, LLP

Our Team

Meet Our Surgeons

St. Petersburg Office, Tampa Office

Gregory V. Hahn, MD

Board Certified Orthopaedic Surgeon

St. Petersburg Office, Tampa Office

Drew E. Warnick, MD

Board Certified Orthopaedic Surgeon

St. Petersburg Office, Tampa Office

Lee G. Phillips, MD

Board Certified Orthopaedic Surgeon

St. Petersburg Office, Tampa Office

Daniel C. Bland, MD

Board Certified Orthopaedic Surgeon

St. Petersburg Office, Tampa Office

Ryan E. Fitzgerald, MD

Board Certified Orthopaedic Surgeon

St. Petersburg Office, Tampa Office, Lakewood Ranch

Brian R. Piazza, MD, MSC

Board Certified Orthopaedic Surgeon

Hospital and Surgical Center Affiliations

Our surgeons have privileges at the following hospitals:

Dr. Warnick, Dr. Phillips, and Dr. Bland have privileges at the following surgical center:

Dr. Fitzgerald has privileges at the following hospital:

Directory

Featured Testimonials

What Parents Say

Kim Pivacek

Our daughter has been treated by Children’s Orthopaedic twice, once for a broken arm and the other for two broken bones in her hand both due to sports injuries. Our son was also treated for a broken arm. In each case, we were tended to right away and given the best care. The kids were nervous but the staff and doctors put them at ease. Their injuries healed perfectly and the follow up care was tremendous. We have since gone back with our other son for treatment on his knee due to sports camp. We are a sports family and there is no other place we would trust our kids to than Children’s Orthopaedic!

Meet Our Emeritus Surgeons

Sheila M. Love, MD

Emeritus

Scott W. Beck, MD

Emeritus

Jeffrey B. Neustadt, MD

Emeritus

Paul L. Benfanti, MD

Emeritus

Meet Our Physician Assistants and Nurses

In December 2005 Cody started at COSSA after graduating from Towson University Physician Assistant program in Baltimore, Maryland. He was President of his 2005 graduating class and helped organize efforts in raising more than $10,000 for charities such as Toys For Tots, Bea Gaddy’s Foundation for the Homeless and Adopt a Family. Cody was raised in St. Petersburg and graduated with his Bachelor’s degree from University of South Florida.

Cody Thompson, PA-C

Certified Physician Assistant

Stephanie graduated from Nova Southeastern University’s Fort Lauderdale Physician Assistant program with a Master’s in Medical Sciences in August 2021. She obtained her Bachelor of Science in Biology with minors in Chemistry, and Microbiology and Immunology from the University of Miami in 2016. Stephanie was born and raised in Miami, Florida.

Stephanie Aldridge, PA-C

Certified Physician Assistant

Ryan is a graduate of Missouri Valley in 2007 with a Bachelor of Science in Athletic Training and Exercise Science. He graduated with a Master of Science in Advanced Athletic Training from The University of South Florida in 2013. He was in the inaugural Physician Assistant Program at the University of Tampa graduating in December 2021. Prior to joining our practice, he spent 10 years at John Hopkins All Children’s Hospital in Primary Care Sports Medicine. Ryan was born and raised in St. Petersburg.

Ryan Ross, PA-C

Certified Physician Assistant

Erica graduated from Florida Gulf Coast University in 2010 with a Bachelor of Science in Athletic Training. She graduated with a Master of Science in Sports Management from The United States Sports Academy in 2012. She later graduated from the Barry University Physician Assistant Program in December 2017. Erica was born and raised in New Jersey and moved to St. Petersburg in 2010. Prior to joining our practice in 2023, she spent 6 years working in Urgent Care. She is an active board member of the St. Petersburg Junior Women’s Club.

Erica Ayral, PA-C

Certified Physician Assistant

Jordan is originally from the east coast of Florida. She received her Bachelor’s degree in Health Sciences at the University of Florida and went on to complete her Master’s degree in Physician Assistant studies at South College in Knoxville, TN in 2022. Jordan returned to Florida and began her career in adult Neurosurgery before transitioning to pediatric orthopedic surgery.

Jordan Mackey, PA-C

Certified Physician Assistant

Zoe graduated from Skidmore College in Saratoga Springs, NY in 2013 with a Bachelor of Art in Biology. She graduated from the Duke University Physician Assistant Program in September 2017. Zoe was born in Montana and raised in Maine. She moved to St. Petersburg in 2020. Prior to joining our practice in 2025, she was a Surgical PA in Norwich, CT for 3 years and worked in adult orthopedics doing joint replacements in Bradenton, FL for 4 years.

Zoe Quinn-Kelly, PA-C

Certified Physician Assistant

Isaak graduated from Colorado State University in 2019 with a Bachelor of Science in Health and Exercise Science, concentrating in Sports Medicine. In 2025, he earned his Master of Physician Assistant Practice from Campbell University in North Carolina, where he was inducted into the Pi Alpha National Honor Society. Isaak has also served as a youth mentor with several organizations, including Big Brothers Big Sisters and Partners Mentoring Youth. He was born and raised in Estes Park, Colorado.

Isaak Cirone, PA-C

Certified Physician Assistant

Bailey earned her Master’s Degree in Physician Assistant Studies from Lake Erie College in August 2025. She completed her Bachelor of Science in Biology, with a minor in Psychology, at Ashland University in 2022, where she was a member of the women’s soccer team and recognized as a Division II Scholar All-American. Born and raised in Northeast Ohio, Bailey relocated to Tampa, Florida, after PA school to begin her career focusing on pediatric orthopedics.

Bailey Clark, PA-C

Certified Physician Assistant

Cara is a graduate of the University of Pittsburgh, where she received her bachelor’s degree in Rehabilitation Science and her Master’s degree in Physician Assistant Studies. She was the treasurer of her 2016 physician assistant class. During her education, she also completed medical mission work in Costa Rica and studied European healthcare systems while abroad in Ireland. Born and raised in Pennsylvania, she moved to St. Petersburg in 2017 and joined our practice shortly after.

Meet Our Nurses

Iris is our Tampa office LPN. She joined our practice in January of 2016 after working for a primary care office for several years. Prior to that she worked in mental health and substance abuse. Her goal when becoming a nurse was to work with children and she really enjoys being here!

Iris Saldana, LPN

Licensed Practical Nurse

Maria is a Registered Nurse with several years of experience in the medical field. She received her degree in Nursing from Rasmussen University and is currently furthering her education. Prior to joining our practice in 2024, she worked at a pediatric primary care for 5 years where she developed her passion for working with kids and was motivated to become a nurse.

Maria Monzon, RN

Registered Nurse

Cara is a graduate of the University of Pittsburgh, where she received her bachelor’s degree in Rehabilitation Science and her Master’s degree in Physician Assistant Studies. She was the treasurer of her 2016 physician assistant class. During her education, she also completed medical mission work in Costa Rica and studied European healthcare systems while abroad in Ireland. Born and raised in Pennsylvania, she moved to St. Petersburg in 2017 and joined our practice shortly after.

Cara Semelsberger, PA-C

Certified Physician Assistant

Meet Our Athletic Trainers

Erin graduated from the University of Florida in 2010 with a Bachelor of Science in Athletic Training. She graduated from the University of Florida in 2012 with a Master of Science in Applied Kinesiology and Physiology with a concentration in Athletic Training and Education. She has experience in multiple clinical settings, including the physician practice, rehabilitation clinic, secondary schools, national-team sports, education, and research. Erin lives in Clearwater with her husband, two children, and two dogs.

Erin Roca, MS, LAT, ATC, CSCS

Certified Athletic Trainer

Emma graduated from the University of Central Florida in 2021 with a Bachelor of Science in Kinesiology. She graduated from the University of Central Florida in 2024 with a Master of Science in Athletic Training. She has experience in multiple clinical settings, including secondary schools, physician practice, collegiate sports, and research. She is currently the Head Athletic Trainer for Keswick Christian School. Emma was born and raised in Central Florida and moved to Saint Petersburg in 2024.

Emma Kessinger, MS, LAT, ATC

Certified Athletic Trainer

Cara is a graduate of the University of Pittsburgh, where she received her bachelor’s degree in Rehabilitation Science and her Master’s degree in Physician Assistant Studies. She was the treasurer of her 2016 physician assistant class. During her education, she also completed medical mission work in Costa Rica and studied European healthcare systems while abroad in Ireland. Born and raised in Pennsylvania, she moved to St. Petersburg in 2017 and joined our practice shortly after.

Cara Semelsberger, PA-C

Certified Physician Assistant

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