90853 Group via Telehealth

[EBurleyStill]

I bill for a Behavioral health agency in GA.  We have twice weekly group therapy sessions.  Since the participants are youths or parents of clients (2 different sessions), some attend via a telecommunication platform.  I have not been billing these since the DBHDD manual does not show the group codes using a telehealth modifier. 
Does anyone have experience billing group via TH?  Thank you!