I am really struggling with thus "unit" issue. Everything I have read indicates that you are not to bill anything under a full 15 minutes as a unit, But if you look at the chart previously posted, it shows that for payers following Medicare guidelines, you don't count the first unit until you've reached 69 minutes. For payers that aren't following Medicare guidelines and using CPT 99417, the first unit starts at 55 minutes. Isn't that a contradiction to "you don't bill anything under a full 15 minutes"? If I'm not looking at this the correct way, please let me know! I have had several discussions with my provider on this and we both have some doubts that we are doing this correctly. Any insight from those who've billed these charges, please enlighten me.