Keeping your young children healthy is our top priority at Twickenham Pediatrics. Our physicians will monitor your child's growth and development, while he or she reaches developmental milestones. From routine checkups to sick visits, Drs. Horton, Chappell, and DeSimone will give your child the care he or she needs. During your child's checkup, our doctors will provide you pamphlets and tips about what you can expect from the next stages of your child's development, such as behavioral changes, and steps you need to take to make him or her safer.. Pediatrics