Which modifier is commonly used to identify telemedicine services in billing?

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Billing telemedicine encounters relies on a modifier to show the service was delivered via telecommunications rather than in person. The modifier commonly used to designate a telemedicine encounter is GT, which stands for “via interactive audio and video telecommunications” and indicates real-time remote communication with the patient. Payers recognize this modifier to apply telemedicine reimbursement rules.

Other options don’t serve this purpose: a facility fee code is for originating-site charges rather than signaling the method of service delivery; UD isn’t the standard telemedicine indicator in most payer policies; and combining GT with UD isn’t a recognized or necessary practice. Because GT clearly communicates real-time telemedicine delivery, it is the best choice.