Answer: Permanently
Step-by-step explanation:
MPI stands for master patient index. It remains in the hospital permanently. It is a database which is used in the healthcare to maintain its consistency, essential medical documents, managed in a department.
It is necessary to have records of the patients that once visited the healthcare so that in case the patient comes again there will be a brief description of patient earlier.
This is a type of patients record which is kept in the healthcare for lifetime or permanently.