I am searching for a dx code to go with a Synagis vaccine for a 3 month old infant who was exposed to unspecified air pollutants (unknown drugs; meth & who knows what else) from before birth to one month of age. He has no diagnosed respiratory effects (yet) but Dr. wants to get a Synagis covered by MHS. Probably needs to include some sort of respiratory reference. I could only come up with 760.70, 508.9 or 987.9 but none of these I'm really happy with. Any suggestions?..............Melinda Navara, CPC