If you are referring to the anesthesiologist billing for a-lines or swan ganz lines in addition to the anesthetic, they are billing for the actual INSERTION OF THE LINES as a procedure, NOT for the monitoring- codes state "catheterization or insertion of." (they wouldn't bill the codes if the lines were in situ and they just hooked them up to the monitors would they?)
There are multiple TEE codes, if you are billing the diagnostic TEE codes(93312,93315)- there are dx to procedure LCDs for CMS because it is NOT monitoring but Diagnostic and they need medical necessity to be covered. Why was the procedure necessary- what is wrong with the patient- signs/symptoms to justify the TEE? If the anesthesiologist is using the TEE only for monitoring (CPT 93318)- it is bundled into EVERY Anesthesia CPT code by CCI. Part of the job of the anesthesiologist is to monitor the patient, regardless of techniques i.e. pulse ox, BIS monitor, arterial line monitor, or TEE monitor.
You need to make sure your providers are documenting appropriately and reporting the appropriate CPT code for the TEEs.
Hope this helps.