Grantham earned her Doctorate of Nursing Practice in education and leadership from American Sentinel College of Nursing at Post University. She earned both her Masters of Science in Nursing (Adult Nurse Practitioner), and her Bachelors of Science in Nursing from Armstrong Atlantic State University (now part of Georgia Southern University). Prior to that, she earned her Associate of Science in Nursing from Coastal Georgia Community College (now the College of Coastal Georgia). Her professional affiliations include Sigma Theta Tau, the American Nurses Association, and the Georgia Nurses Association.