If a patient has been using their Dexcom receiver and then switches to a compatible smart device† to display their glucose data, can the provider bill CPT code 95249 for this training?

It is highly unlikely any commercial payers would cover training costs for devices that are not reimbursed. (Medicare does not currently reimburse for a CGM system if a smart device is solely used to display glucose data. The patient must have a receiver to use in conjunction with the smart device.) However, providers should check with individual payers for specifics on billing when a patient switches to using a smart device for glucose data display.