I appreciate all the input!

In my situation, this person's exact dx is "Bipolar II disorder, mild, depressed with anxious distress, in full remission". I did some searching and found a study that said "the median time to remission was 67.5 days (72.5 days for depressive episodes versus 58.0 days for manic episodes)." Unfortunately, that still doesn't answer the question as to what qualifies as "remission" nor does it explain the difference between partial vs full remission.

It can't possibly be this complicated.