Final answer:
Documentation of appointment changes and patient behavior is crucial for accurate medical records.
Explanation:
Cancellation or no-show of appointment: This should always be documented in the patient's medical record as it reflects the patient's engagement with their healthcare plan.
Time change of appointment: Documenting changes in the appointment schedule ensures a comprehensive record of the patient's interactions with the healthcare system.
Patient arrival late for appointment: Late arrivals impact the patient's healthcare experience and should be noted in their medical record for continuity of care.
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