We do 5-day Thawed Plasma and we use the E2121 code as follows: Frozen code (FFP) Thawed FFP code (24 hr.) Thawed Plasma Code (5 day) E0701V00 E0773V00 E2684V00 E0869V00 E1318V00 E2121V00 E0869VA0 E1318VA0 E2121VA0 E0869VB0 E1318VB0 E2121VB0 There should be additional letters on the end of your product codes to state what containers they came from. We use the E2121 code for our 5-day thawed plasma but we use it for the frozen codes starting with E0869. We have E0869V00, E0869VA0, and E0869VB0. When we modify them to the 5-day plasma we use codes E2121V00, E2121VA0 and E2121VB0 respectively. When I look on the http://iccbba.org/ website they have an ISBT128/Codabar map and the code I see for Apheresis FFP|ACD-A/XX/<=-18C is E0869 and they actually have codes for up to 8 parts (E0869VA0, E0869VB0, etc. up to E0869VH0). I did not see the E4693 or E4697 codes you mentioned but they could be new I guess. At any rate you can use E2121 product code for your 5-day plasmas even if they have the same DIN number because the product codes should have different extensions (e.g. E2121VA0 and E2121VB0). As far as your question about which thawed plasma code to use for E2555 vs E7071 (which I think is E0701) you would use the E2701 code for the thawed E2555 product I would think because they have the same description of 'Frozen <=24h.' We use E2684 for the thawed E0701 product. You really need to look at the descriptions and match them up for frozen vs thawed products.