There are multiple definitions:

1. International Headache Society(English)

   • Headache, Organizations (international)

2. Israel Heart Society(English)

   • AHA, ACC
   • Cardiology, Organizations (documentation)

3. Indian Health Service(English)

   • DQM, HIE, MPI, RPMS
   • Electronic health record, Ethnicity
   • https://www.ihs…erpatientindex/