Acronyms  
EHR Electronic Health Record
PHR Personal Health Record
RLS Record Locator Service
MPI Master Patient Index
HIE Health Information Exchange
AHIMA American Health Information Management Association
API Application programming interface
HHS Department of Health and Human Resources
ONC Office of the National Coordinator for Health Information Technology
OCR Office of Civil Rights
FTC Federal Trade Commission
HISP Health Information Service Provider
RA Registration Authority
CA Certificate Authority