1605 N. Cedar Crest Blvd., Suites 117 and 119, Allentown, PA 18104. Contact Us: 215-590-4040. Today's Hours: 8:00am-4:30pm. ( See All Hours) Children's Hospital of Philadelphia (CHOP) Cardiac Center in Allentown, PA, provides convenient, easy access to services and staff from the Cardiac Center at CHOP. Our cardiologists proudly serve the ....