No message required (for referential integrity)

SRM - Register a patient on a clinical trial

SRM - Cancel a patient registration on clin.trial (for clerical mistakes only)

SRM - Correct/update registration information

SRM - Patient has gone off a clinical trial

SRM - Patient enters phase of clinical trial

SRM - Cancel patient entering a phase (clerical mistake)

SRM - Correct/update phase information

SRM - Patient has gone off phase of clinical trial

CSU - Automated time intervals for reporting, like monthly

CSU - Patient completes the clinical trial

CSU - Patient completes a phase of the clinical trial

CSU - Update/correction of patient order/result information

ORM - Order message (also RDE, RDS, RGV, RAS,

ORR - Order response (also RRE, RRD, RRG, RRA,

PEX - Unsolicited initial individual product experience report

PEX - Unsolicited update individual product experience report

QRY/DSR - Query sent for immediate response

QRY - Query for results of observation

RAR - Pharmacy administration information query response

RDR - Pharmacy dispense information query response

RER - Pharmacy encoded order information query response

RGR - Pharmacy dose information query response

ROR - Pharmacy prescription order query response

VXQ - Query for vaccination record

VXX - Response to vaccination query returning multiple PID matches

VXR - Vaccination record response

VXU - Unsolicited vaccination record update

ORU - Waveform result, unsolicited transmission of requested information