Meet Our Seasoned Pediatric Doctors

DR. GUY CASTLES, III
M.D., F.A.A.P.
Education:
B.S., University of South Carolina
M.D., Medical University of South Carolina
Internship/Residency: Medical University of South Carolina Charleston, SC

Dr. C. Guy Castles, III, is a second-generation pediatrician practicing at the office his father founded. He started practicing in 1991 after his father's retirement.

Dr. Castles is a graduate of MUSCs College of Medicine and completed his internship and residency at MUSC Children’s Hospital and is board certified by the American Board of Pediatrics. Dr. Castles currently serves on the Board of Trustees at MUSC and previously served on the Board of Trustees at Palmetto Health Richland and has been serving on the MUSC Board of Trustees since 2016. He has been honored for his numerous charitable contributions and dedication to his community with the prestigious Order of the Silver Crescent. In 2014 and 2016, the Edward Via College of Osteopathic Medicine awarded him the Preceptor of the Year, and he was named The State Newspapers Best Pediatrician in 2015, 2016, 2017, and 2018. Dr. Castles is an Elder at Centennial Associate Reformed Presbyterian Church, earned by his commitment to his faith and community. Dr. Castles and his wife, Libby Lee Gannt, have six children, and 3 precious grandchildren. Beyond his devotion to family and work, he enjoys a variety of other activities, including golf and water sports.

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DR. JOE B. CASTLES, III
M.D., F.A.A.P.

Education:
B.S., Newberry College
M.D., Medical University of South Carolina
Internship /Residency: Palmetto Health Richland Hospital, Columbia, South Carolina

Dr. Castles joined Pediatric Associates in 2003.

Dr. Castles is a graduate of the Medical University of South Carolina and completed his internship and residency at Palmetto Health Richland and is board certified by the American Board of Pediatrics. He is a member of the South Carolina Medical Association and serves on the board of Dickerson Children's Advocacy Center. Dr. Castles and his wife Liz Chitty Castles have 4 children. Beyond his devotion to faith, family and work. He enjoys a variety of activities including golf, hunting, fishing, and supporting Newberry College Athletics.

Shannon W. Easterlin
CPNP

Shannon is a board-certified Pediatric Nurse Practitioner who is a native of Chapin, SC. She graduated with her Bachelors of Science in Nursing from the Medical University of South Carolina in 2008 and then with her Masters of Science in Nursing from MUSC in May 2010. She started her career as a Pediatric Nurse Practitioner shortly after graduating at The Pediatric Clinic in Orangeburg, SC. She provided top quality and compassionate care to the children of Orangeburg and surrounding areas for 12 years before deciding to join Pediatric Associates in October 2022 to be closer to her family and home. Shannon has one child and loves spending time with her family. She looks forward to serving the children of Columbia and surrounding areas for many years to come.