Facilitating Access to Specialty Treatment

Inclusion Criteria for concussed subjects: * Males and females age 13 - 18 * Present to the Children's Hospital of Philadelphia (CHOP) Emergency Department (ED) within 72 hours of head injury * Meet criteria for concussion as defined by the most recent International Consensus Statement on Concussion * Own a smartphone * Meet criteria for moderate-to-high risk for Persistent Post-Concussion Symptoms according to 5P rule (score \>3/12) Exclusion Criteria for concussed subjects: * Glasgow Coma Scale score \<13 * Lower extremity trauma * A prior concussion within 1 month * Non-English speaking * Admission to the hospital at the initial head injury visit * Previously enrolled in the study * Inability to complete study procedures. Inclusion Criteria for parents: * Child meets the study eligibility criteria Exclusion Criteria for parents: * Non-English speaking Inclusion Criteria for providers: * ED or specialty provider caring for at least one patient via the mobile Health (mHealth)-facilitated care handoff strategy Exclusion Criteria for providers: * Non-English speaking