36.4.3.14 Supervision of CRNATMHP reimburses an anesthesiologist for supervision of a CRNA. The services of the CRNA must be billed using a CRNA provider identifier. In situations where the anesthesiologist supervises the CRNA and no concurrent procedures occur, the anesthesiologist or the CRNA should bill for the administration of anesthesia. Payment is not made to both providers when the modifier AA is used by the physician anesthesiologist. CRNA services are reimbursed the lesser of the actual charge or 92 percent of the rate reimbursed to a physician anesthesiologist for the same service for covered procedures. Time Units Time Units is based on the time in minutes indicated on the claim by the provider. It is the result of the following calculation:
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• The resulting Time Units value is added to the Base Units value to get the Total Units value. The modifier indicated on the claim determines which time increment is used to divide the total anesthesia time billed. Providers billing anesthesia time must refer to the CPT manual definition of time. The definition is provided under the title Time Reporting: "Anesthesia time begins when the anesthesiologist begins to prepare the patient for the induction of anesthesia in the operating room or in an equivalent area and ends when the anesthesiologist is no longer in personal attendance; that is, when the patient may be safely placed under the postoperative supervision." Refer to: "Supervision of Concurrent Anesthesia Procedures" . |
Time in minutes as indicated on the claim by the provider.
