Which of the following is NOT required on a DEA controlled drug prescription?

In the context of a DEA controlled substance prescription, insurance information is not a mandatory requirement. The Drug Enforcement Administration (DEA) has specific guidelines for what must be included on a prescription for controlled substances. Key elements that must be documented are the patient's name, which ensures that the prescription is correctly attributed to the individual who will receive the medication; the drug strength, which specifies the dosage and concentration of the medication prescribed; and the practitioner’s phone number, which is necessary for verification and communication if needed.

None of these essential requirements ensure proper dosage, patient safety, and the legality of the prescription, while insurance information, although commonly included for billing purposes, does not impact the dispensing or legality of the controlled substance. Therefore, understanding which elements are mandated by the DEA helps ensure compliance with federal regulations and protects both the patient and the healthcare provider in practice.