What is MyChart? Is there a fee to use MyChart? Who is eligible for MyChart? How do I sign up? What is an activation code? How do I get access to the medical records for all of my children? How do I choose my personal MyChart Username and Password? Why do I need an email address to use MyChart? Your Medical Record. The myChildren’s app from Nationwide Children’s Hospital now includes MyChart by Epic, so you can keep track of all your children’s healthcare needs. Specialty tools for kids who have diabetes, Epilepsy, Cystic Fibrosis, Headaches or are in a NICU facility.