According to the provided text, which of the following is NOT a requirement for consultation documentation?

The correct choice centers around the requirements for effective consultation documentation. For a consultation to meet regulatory and guideline standards, it is indeed important for the consulting provider to document their observations and recommendations regarding a patient's diagnosis. However, the specific requirement to include the patient’s diagnosis within the report is not explicitly mandated as a standalone factor.

Options A and B highlight key aspects, such as ensuring that the consulting provider’s final opinion reflects the outcome of the consultation and that a written report is provided to the requesting physician. These elements are crucial for maintaining communication between healthcare providers and ensuring continuity of care.

Option C emphasizes the necessity of documenting services performed and ordered, which is integral to establishing the effectiveness and relevance of the consultation.

In contrast, while documenting a patient's diagnosis contributes to the overall quality of care and communication, it is not stipulated as an absolute requirement in all cases of consultation documentation. Thus, the stance that the report must include the patient's diagnosis is not strictly correct, making it the option that does not align with the core requirements outlined in the context of the question.