sig change question

I have a resident who elected Hospice services 9/1/09. I initiated a change in status MDS to be completed by 9/15. She went to a vascular surgeon today and on 9/18 will be having an AKA for comfort (currently in a lot of pain d/t heel wound). I can't see doing a COS by 9/15 d/t election of hospice services then doing another one due to her new AKA. Do you think it would fly if I write an addendum note to my COS note statin that the IDT will hold off on completeing the COS until the resident return from the hospital but in the interim, the care plan will be updated to reflect her current end stage status?