Final answer:
Edgar was reprimanded for not following the correct protocol of read-back verification when receiving a telephone order from a physician, disregarding critical safety protocols in the healthcare industry.
Step-by-step explanation:
Edgar is likely reprimanded by his supervisor because, in many healthcare environments, there are strict protocols for handling telephone orders from physicians. These typically require a process called read-back verification wherein the receiver of the order repeats it back to the sender to ensure accuracy. Also, the healthcare industry has stringent regulations on recording and verifying orders, commonly to comply with legal and safety protocols to prevent medical errors. Edgar's omission of this critical step could lead to serious patient safety issues and non-compliance with healthcare regulations. Therefore, his supervisor reprimanded him for not following the established protocol for telephone orders.