Final answer:
The appropriate technique for making outgoing calls to patients is confirming their identity before discussing any medical details, to ensure the privacy and confidentiality of their information.
Step-by-step explanation:
When communicating on the telephone with a patient, the appropriate technique for outgoing calls by a medical assistant includes confirming patient identity before discussing medical details. This is essential to maintain the confidentiality and privacy of patient information, as required by laws such as the Health Insurance Portability and Accountability Act (HIPAA). Leaving voicemails with specific medical information or requesting sensitive information in public settings would violate the patient's privacy. Similarly, sharing patient information without verifying identity could result in a breach of confidentiality. Thus, option D demonstrates an appropriate technique for discussing medical details with patients over the phone.