Unit Numbering System- Patient receives the same medical record number on every admission. Objective: To leave all of the patient’s previous medical records located in the same place in the file. (best system) Serial Numbering System- Patient receives a different MR# on each admission. Objective: To issue each patient a new MR# each time he or she is admitted. Serial-Unit- Pt receives new number each time, each one is pulled forward and filed with subsequent chart. Objective: To assign a new number each time, but to have all of the patient’s previous charts filed in the same location. More test answers on https://studyhippo.com/numbering-and-filing-systems/