Holter Monitor

We apply/disconnect a holter, send out for scan/analyses, then our Physician interprets. We bill 93225 for the connection/record/disconnect and 93227 for the Physician interpretation. But what we're wondering....since we receive a bill from the company that does the scan/analyses (they do not bill the patient's insurance co) are we correct in thinking that we can bill for that service as well with the 93226? We'd appreciate some input. Thank you in advance~

Holter Monitor