What type of order requires a supporting written order on file within 14 calendar days?

A verbal telephone order is a type of order that requires a supporting written order to be documented within a specified timeframe, which is 14 calendar days in this context. This requirement is in place to ensure that there is a clear record of the communication for accountability and to maintain the standard of care. Verbal orders can be necessary in urgent situations where immediate decisions are needed, but they must be followed up with proper documentation to confirm the specifics of what was discussed. This process protects both the patient and the healthcare provider by ensuring that there is an accurate and complete record of the orders received.

The other options, while they serve as methods of communication or ordering, do not typically have the same requirement for a written order to be filed after a specific duration. Written, electronic, and faxed orders are generally considered to be formal documentation from the outset, which does not necessitate the same follow-up process as verbal orders do.