It would depend on what is included in the data and what other data is available for reference. You can have medical data that tracks all of the symptoms report

It would depend on what is included in the data and what other data is available for reference. You can have medical data that tracks all of the symptoms reported by a patient without prompt ("What brings you in?"), symptoms reported by a patient with prompt ("Can you describe the pain? Where is it located?"), and the diagnosis by the doctor. It tells you nothing about the patient nor the doctor, but it still provides useful information.