If a billing agency is doing her billing, most likely what happened is they billed off her schedule assuming she saw you and somehow didn't get the information that you didn't meet. The T probably didn't even know this happened until you brought it to her attention. I'm sure she'll get it taken care of. I doubt this is a case of a T trying to get away with anything. Billing errors happen, and all that needs to be done is to bring it to the attention of the therapist so she knows there's a specific issue in the first place remembering it will probably take a few months to get the paperwork straightened out with the insurance company. Insurance companies are notoriously slow with paperwork usually.