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Effective 12/05/10, the fee schedule allowance for anesthesia services will be based upon the formula: (Time Units + Base Units) x Conversion Factor. In addition, every anesthesia procedure billed to OWCP must include one of the following modifiers: AA, QY, QK, AD, QX, or QZ. When multiple procedures are performed during a single anesthetic administration, reimbursement is based on the line item representing the most complex procedure.
