Final answer:
The 'problem list' in a patient's medical record organizes and indexes the patient's problems, diagnoses, and issues that require ongoing attention.
Step-by-step explanation:
The part of the patient's medical record that contains a numbered account of the patient's problems and helps to index documentation throughout the record is the problem list. This list is essential for maintaining an organized record of patient's diagnoses, findings, or other important issues that require attention and treatment over time. It acts as a reference point for healthcare providers to track patient concerns, manage care, and document progress or changes.