When registering for an exemption, your facility should combine the number of central line-days (or ventilator-days, if that is the case) for the two medical ICUs and report that combined number for the central line-days (or ventilator-days) for your medical ICUs. When reporting the number of CLABs or VAPs and corresponding central line-days or ventilator-days for the reporting month, combine the numerator data and the denominator data for the two medical ICUs. (This would also apply if there were two surgical, coronary, pediatric, medical/surgical, or NICUs.)