Telehealth????

I have a Neurologist who is new to our practice and he wants to bill everything Telehealth, he is wanting to provide Telestroke services, critical care, phone visits, Initial Inpatient Visits, Subsequent Visits. I have read the lengthy Cares ACT and I still have so many questions about Telehealth.
1. I am looking for documentation guidelines for codes G0508 and G0509? How do they differ from 99291 and 99292?
2. Can you bill the 99441-99443 codes for a telephone E/M service provided for a...

Telehealth????

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