Rainbow, I've been reading some more on this issue, and I don't think what I wrote earlier was correct with regard to your bill possibly being for 1 60 minute appointment and 1 30 minute appointment. (I think this was your assumption too.) I do not think it is permissible to bill for 2 separate appointments when it was truly just 1 long appointment. The 60 minute code for psychotherapy is to be used for all therapy appointments 53 minutes and longer. So if your therapist chooses to give you 90 minutes, she still has to use the 60 minute billing code.

Beyond talking with your therapist about what the second charge is for, you could ask the insurance about your bill and request the CPT code for each of the charges. The new CPT codes for psychotherapy are 90832 (30 min), 90834 (45 min), and 90837 (60 min). If you have a different code than these, you can look up online what that is for.