What is an example of data collected from a primary source?

Question

an insurance company using a medical record to bill a hospital

a doctor reading a patient's chart that a nurse filled out

information in a patient's chart obtained during a basic intake assessment with a patient

a doctor pulling up a patient's old medical records before performing surgery on the patient

Answer 1

Example of data collected from a primary source: A doctor pulling up a patient's old medical records before performing surgery on the patient.