Is the paper provided by a physician indicating a patient should do an MRI without mentioning any medical imaging business referred to as a prescription or a referral? Or perhaps it is named differently (maybe "lab order")?
According to Wiktionary:
- https://en.wiktionary.org/wiki/prescription: A written order, as by a physician or nurse practitioner, for the administration of a medicine or other intervention.
- https://en.wiktionary.org/wiki/referral: referral = the act or process of transferring someone or something to another, of sending by reference, or referring.
None of these two definitions apply to the paper as an MRI isn't a "medicine or other intervention" and the paper doesn't refer to anyone.
Example of such paper on which the physician ordered some MRI to a patient (source):