During the emergency, it would seem telehealth or telephone encounters would be appropriate for this situation. For telehealth, the visit MUST be performed using and interactive audio and visual platform. HIPAA compliant is certainly preferred, but other services such as FaceTime and Skype are permitted temporarily.
If your provider is performing the visits with interactive audio/visual, you would bill 99201-99215 based on documentation or time, with POS 02. Medicare no modifiers. Most commercial carriers mod -95 unless instructed otherwise.
If your provider is performing TELEPHONE encounters only (must be established patient, must be initiated by patient, not related to visit in past 7 days or result in upcoming visit soonest available), then use G2012 for Medicare (or any other carrier who requests), or 99441-99443 for most commercial. POS 11.