I have a claim for Anthem Access PPO that has denied a pain management office visit claim for "Missing/Incomplete/Invalid principal diagnosis." One of the billers is telling me that M54.16 & M51.26 cannot be billed together. I have never seen anything that these codes cannot be billed together. There is an Excludes 1 for M51.1x, but nothing for M51.2x.

Any input on this would be greatly appreciated.