Final answer:
In an alphabetic filing system, medical records should be labeled using the sequence of last name, first name, and middle initial or name, with full names written out initially followed by any acronyms or abbreviations.
Step-by-step explanation:
When labeling medical records for an alphabetic filing system, the correct sequence to use is typically last name, first name, and then any middle initial or name. In a professional setting such as a hospital or doctor's office, it is essential to write out full names the first time they are used on a label, followed by any acronyms or abbreviations in parentheses. After establishing the full name and abbreviation, one may use the abbreviation for subsequent references in the records. Accurate labeling is crucial for maintaining organization and ensuring efficient retrieval of records.