Patient Portal; Pay Online; Menu. Pediatric & Adolescent Center 424 Mulberry Street Milton, DE 19968. Phone: (302) 684-0561 Fax: (302) 684-0604. Extensions: ... We would like to give an update about how The Pediatric & Adolescent Center is handling the Coronavirus (COVID-19) infections in our area. Our main concern is the health and well-being ....