Our Practice

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Meet Our Staff!

At Seaside Family Medicine we care about your health and well being and look forward to building a build life-long relationships with you and your family.  We want to provide you with the best possible healthcare experience in a positive and relaxed environment so that you look forward to your next visit with us.

Our providers are highly skilled and experienced nurse practitioners trained in both adult and pediatric medicine. They are supervised by a medical doctor who is trained in internal and emergency medicine and is available to them for consults at any time.


Gary Headden, MD
Medical Director

Dr. Gary Headden is the Supervising Physician at Seaside Family Medicine. He is an internal medicine specialist who has been practicing for more than 28 years.  Dr. Headden received his medical degree from Medical University College of Medicine of South Carolina in 1990. He completed his residency at Medical University of South Carolina and has been practicing medicine in the Charleston, SC area. 

Dr. Gary Headden lives in Mt. Pleasant and during his time away from practicing medicine enjoys spending quality time with his family and friends.


Donna Marie McAllister
Chief Operating Officer

Donna Marie McAllister is the Chief Operating Officer and part owner of Seaside Family Medicine. She was born and raised in Boston, Massachusetts. Donna has over 20 years of experience managing staff in financial operations within the international banking and Medicare insurance administration sectors. During her career Donna has developed and implemented quality improvements that resulted in efficiencies, streamlined processes, and cost savings.

Donna is responsible for the daily operations at Seaside Family Medicine including financial operations, compliance, and personnel management. She is dedicated to ensuring that the best possible care for you and your family is provided and that you are treated by staff in a kind and respectful manner.

Donna lives with her husband in West Ashley and during her time away from the office she enjoys spending time with family and friends, entertaining, interior decorating, exploring Charleston, and relaxing on the beach.


Amanda McAllister, DNP ** Accepting New Patients**
Pediatric Nurse Practitioner

Amanda McAllister is a doctoral prepared Pediatric Nurse Practitioner (PNP) who grew up in Boston. From an early age she knew she wanted to work in healthcare, specifically with children. She received her Bachelor's and Master's in Nursing from  Regis College in Weston, MA.  After finishing the program, she decided to make a change and move to beautiful Charleston, SC. Once in Charleston, she enrolled at Medical University of South Carolina and graduated with her Doctorate of Nursing Practice with a 4.0 GPA.

Amanda has over six years of experience as a PNP with five of the years spent working in rural health. During her clinical training Amanda completed a rotation in the behavioral neurology department at Boston Children’s Hospital where she learned about the management of pediatric behavioral health conditions. She also completed a clinical rotation in the newborn nursery further increasing her knowledge of the care of infants.

Amanda lives in Mount Pleasant and enjoys playing tennis, boating, and exploring the Lowcountry. She is excited to join the medical community in the Summerville area and provide high quality pediatric care.


Jenny Young, MSN **Accepting New Patients**
Family Nurse Practitioner

Jenny Young is a Family Nurse Practitioner (FNP) at Seaside Family Medicine. She received her Master's of Science in Nursing degree from Medical University of South Carolina in 2015. She has been practicing at a family practice office in rural South Carolina since graduating. Jenny has experience seeing both pediatric and adults patients. Prior to becoming a nurse practitioner, she worked as a emergency room nurse for more than 5 years. She obtained a Bachelor of Science in Nursing and a Bachelor of Arts degree in Biology in Michigan, which is where she is originally from.

Jenny is a caring and extremely dedicated nurse practitioner. She is passionate about preventative care and maintaining healthy communities. She enjoys working with patients and incorporating them into how to best manage their acute and chronic conditions.

Jenny lives in Mouth Pleasant with her husband, Jonathan, and her two dogs, Bijoux and Phoebe. She enjoys travelling, fishing, playing beach volleyball, and enjoying all the delicious food that Charleston has to offer.