St. Tammany Health System has exciting news for parents in Mandeville. Our newest full-service pediatrics clinic is now open and ready to provide top-notch care for your little ones. Keeping those families happy and healthy is the primary mission of St. Tammany Pediatrics, our full-service pediatrics practice designed to care for patients from birth to 17 years of age. That includes routine wellness care, including childhood vaccinations, as well as same-day appointments for treatment of illnesses.