Billing and Payment for Multiple Anesthesia Procedures

Physicians bill for the anesthesia services associated with multiple bilateral surgeries by reporting the anesthesia procedure with the highest base unit value with the multiple
procedure modifier “-51.” They report the total time for all procedures in the line item with the highest base unit value.

If the same anesthesia CPT code applies to two or more of the surgical procedures, billers enter the anesthesia code with the “-51” modifier and the number of surgeries to which the modified CPT code applies.

Payment can be made under the fee schedule for anesthesia services associated with multiple surgical procedures or multiple bilateral procedures. Payment is determined based on the base unit of the anesthesia procedure with the highest base unit value and time units based on the actual anesthesia time of the multiple procedures.

Payment at Medically Supervised Rate
The Part B Contractor may allow only three base units per procedure when the anesthesiologist is involved in furnishing more than four procedures concurrently or is performing other services while directing the concurrent procedures. An additional time unit may be recognized if the physician can document he or she was present at induction.

Payment for Medical and Surgical Services Furnished in Addition to Anesthesia Procedure

Payment may be made under the fee schedule for specific medical and surgical services furnished by the anesthesiologist as long as these services are reasonable and medically necessary or provided that other rebundling provisions (see §30 and Chapter 23) do not preclude separate payment. These services may be furnished in conjunction with the anesthesia procedure to the patient or may be furnished as single services, e.g., during the day of or the day before the anesthesia service. These services include the insertion of a Swan Ganz catheter, the insertion of central venous pressure lines, emergency intubation, and critical care visits.

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