When selecting an outpatient E/M level, which elements drive the level?

• A. History, examination, and medical decision making drive the level; time may be used when documented
• B. Time exclusively drives the level
• C. Only history drives the level
• D. Only examination drives the level

Answer: (A)

In outpatient E/M coding, the level is determined by three core elements: the history obtained, the extent of the physical examination, and the medical decision making. Together, these elements reflect the complexity and effort of the visit. Time becomes a valid determinant only when the documentation shows that the total time spent on the encounter (including counseling and/or coordination of care) is the primary factor in selecting the level. In other words, time can substitute for the combination of history, examination, and MDM, but it must be supported by the documented total time and the nature of the work performed.

This is why the best choice is that history, examination, and medical decision making drive the level, with time allowed as an alternative when documented. Time alone isn’t the default driver, and the level isn’t based on history or examination alone, since MDM and the overall documentation of the encounter also play essential roles.