The 10-45 codes were updated around last September to correspond to the EMS trauma tags.
Code 1: Black Tag, Deceased - Victim Deceased
Code 2: Red Tag, Immediate - Victim requires immediate transport and medical attention
Code 3: Yellow Tag, Delayed - Victim requires further medical attention.
Code 4: Green Tag, Minor - Victim is "walking wounded." May be treated on scene with a band-aid.