Thank you Michelle and everyone else who responded. I purchased the book (thanks for the discount code :-) Found my first error right away e.g. type of bill!
For anyone reading this and you're new to the UB-04 form (but have experience with medical billing!!), save yourself hours of reading and research, just buy the book!!
Questions though, I'm billing for an MH/SA IOP so no admit date in Box 12 , right? (my second error)
Box 15- Patients are usually referred by a Sober Living facility, how do I answer this question? If it's a physician referral, do I then enter name and NPI in box 78?
Thanks again for your help.