The modifier you are looking for is GW- service unrelated to terminal condition.
I understand that if the care is completely unrelated to the terminal condition it can be billed using the GW modifier. I have actually billed services out that have been paid, and I got the information from Medicare.
Personally, it doesn't make sense to me. When we got hospice for my grandfather we were told that we could only provide comfort care, and it seems that any care unrelated to the terminal condition would fall outside of that, but I have seen many cases of services being billed with the GW and being paid.
I'd love to hear if others have any info/experience with this.
Michele