Final answer:
The standard used in e-prescribing systems to transmit a prescription to a retail pharmacy is NCPDP.
Step-by-step explanation:
The standard used in e-prescribing systems to transmit a prescription to a retail pharmacy is NCPDP (National Council for Prescription Drug Programs).
NCPDP is an industry standard that provides a consistent format for exchanging prescription information between prescribers, pharmacies, and payers. It includes data elements such as patient information, drug details, dosage instructions, and electronic signature.
Other standards like HL7 (Health Level 7), CDA (Clinical Document Architecture), and DICOM (Digital Imaging and Communications in Medicine) are used in healthcare IT but are not specifically designed for e-prescribing.