I have private payers (specifically BCBS) denying my global OB billing when the start DOS is during ICD 9 and the delivery date is after ICD 10. First they denied saying that I should use and ICD 9 code (they're using the start date (FEB 2015) as the DOS, which, in my opinion, is incorrect. The DOS is the delivery date (Oct 2015) and should be coded w/ICD 10. Now, they are denying, saying they want itemized billing, but won't tell me any details. Any help is greatly appreciated! Thank you.