1. ICD-9-CM diagnostic codes that are used when a person who is not currently sick encounters health services for some specific purpose such as to act as a donor of an organ or tissue, receive a vaccination, discuss a problem that is not in itself a disease or injury, seek consultation about family planning, request sterilization, or to obtain supervision of a normal pregnancy. In these situations the V code appears as a primary code and is placed first for the purpose of billing. 2. Codes used to identify a condition that might affect the patient at a future time but is not a current illness or injury. Use a V code to describe an existing situation that might influence potential medical care.