Can 99214 be billed twice in one day?

No, CPT code 99214 (office or other outpatient visit for the evaluation and management of an established patient, which requires a detailed history, detailed examination, and medical decision making of moderate complexity) should not be billed twice for the same patient on the same day. Each CPT code should only be billed once per patient encounter unless there are extenuating circumstances that justify billing multiple times, such as separate and distinctly identifiable services provided during different encounters.