I don't think there is any specific guidance on your question. However, I do think you have two options.
My first one would be 99499 ? unlisted E&M and submit the medical records. This is my first choice.
However, I do think there could be a valid argument for 99221-52 ? reduced service and still submit the medical records.
I was trying to think if you could use an argument for the ?half way? point. Meaning, if the minimum has not been reached, can you still get the minimum code. But I think no, you can?t.
So my first choice is 99499 and submit the medical records.