Apr 25, - Lorazepam (Ativan ®) - Intravenous (IV) Dilution. should be administered at least 2 hours before the anticipated operative medicalcases.eug: code. CPT: Print Include LOINC® in print Share Order Code, Order Code Name, Order Loinc, Result Code, Result Code Name, UofM, Result LOINC. , Lorazepam, Serum/Plasma, , Lorazepam (Ativan), ng/mL, Missing: ivp. Apr 22, - If the documentation is missing the stop time for an IV push, is it ok to still code this procedure? A list of IVP you might see given in the ED to get you started: medicalcases.eu Ativan IVP.