Advance care planning

My providers have just started charging for the advance care planning, the 99497. A lot of times this is the dictation that is on the note for this:

"We did talk about code status she said do whatever you have to do to get me started up again so she is considered a full code. Probably 3 minutes or less discussing those last 3 issues."

My questions is do you think this is sufficient documentation to support billing this. I know this is a time based code and it says the first 30 minutes. Is there anything that would support that it needs to be at least half the time, 16 minutes.