This is not exactly an Oasis question, but I was hoping someone could help me with the correct way to document skilled nurse frequency. Our Biller tells us that the documentation is changing for the weeks with one to 3 days left over at the end of the calendar. For example I was taught to document 0D1 for 1 day left over with no visits . 1D1 for 1 day left with a visit on that day. 1D3 for one visit with 3 days in that last week. I am completely unsure of myself now. I would appreciate any explanation of the correct way to document the frequency.