Book excerpt: This book details how electronic health records (EHRs) and medical records (EMRs) can be optimized to enable meaningful interactions between provider and patient to enhance quality of care in this new era of mHealth. As the technologies evolve to provide greater opportunities for mHealth applications, so do the challenges. This book addresses the issues of interoperability limitations, data processing errors and patient data privacy while providing instruction on how blockchain-like processes can potentially ensure the integrity of an externally maintained EHR. Portable Health Records in a Mobile Society identifies important issues and promising solutions to create a truly portable EHRs. It is a valuable resource for all informaticians and healthcare providers seeking an up-to-date resource on how to improve the availability, reliability, integrity and sustainability of these revolutionary developments in healthcare management.