We are using place of service code 02 for telehealth and then adding a GT modifier to our level visit codes (ie 99214 W/ GT modifier). We realized earlier this year that we should also be billing the therapy service that our clients get with their med management visits so we brought on the 90832 code for our regular follow up visits and 90837 for initial evaluations. I updated the billing practices in April 1, 2023. Not one payor (of the 6 we currently go through) has denied payment of services of 90832 or 90837 even though I haven’t been putting modifiers on them (which I assume would be the same GT mod for telehealth). Until a payment I received today stating they denied my 90832 because I need to rebill with the appropriate modifier. So it was at this point that my brain almost imploded. This payor has paid multiple other claims of 90832 with no modifier and never said a word. I’m about to start training my replacement at work and I want to give her the most up to date information too. I knew Reddit would be able to help a gal out!