20 Miss. Code R. § 2-II
Base units are listed for most procedures. This value is determined by the complexity of the service and includes all usual anesthesia services except the time actively spent in anesthesia care and the modifying factors. The base units include preoperative and postoperative visits, the administration of fluids and/or blood incident to the anesthesia care, and interpretation of non-invasive monitoring (ECG, temperature, blood pressure, oximetry, and other usual monitoring procedures). The basic anesthesia unit includes the routine follow-up care and observation (including recovery room observation and monitoring). When multiple surgical procedures are performed during the same period of anesthesia, only the highest base unit allowance of the various surgical procedures will be used.
20 Miss. Code. R. § 2-II