Which information is mandatory for controlled substance prescriptions but unnecessary for noncontrolled substance prescriptions?

The requirement for a prescriber's DEA (Drug Enforcement Administration) number on a controlled substance prescription is crucial due to the regulatory framework governing these medications. Controlled substances are categorized into schedules based on their potential for abuse and dependency, and as such, they are subject to strict regulations. The DEA number acts as a means of identification for healthcare providers authorized to prescribe these medications, ensuring that prescriptions can be tracked and monitored for misuse or illegal distribution.

This level of oversight is not applicable to noncontrolled substances, which do not carry the same risk of abuse. Therefore, the inclusion of the prescriber's DEA number is mandatory for controlled substance prescriptions, as it provides a safeguard against potential misuse, helps in maintaining accurate records, and ensures compliance with federal laws.

While the other elements—such as the date the prescription is issued, the quantity of medication, and the prescriber's address and telephone number—are common requirements for both controlled and noncontrolled medications, they do not have the same regulatory implications as the DEA number. Thus, the inclusion of the DEA number is specifically essential for controlled substances, distinguishing it from the requirements for noncontrolled prescriptions.