I am wondering how the billers out there handle a fill in doc with billing/credentialing? Especially to vision plans like eyemed, vsp etc. I know medicare does the locum tenens thing with a Q6 modifier, but some insurances don't recognize that. There is no way that offices go through a rigorous credentialing for a fill in doctor that worked there one day out of the year because our doc got sick, but I'm not finding many clear answers. Just curious what everyone else's experience is with billing for a sub doc?

Thanks