V45.xx codes are designated as secondary only codes, the guidelines state that they can be used in conjunction with other after care codes :
"Status V codes may be used with aftercare V codes to indicate the nature of the aftercare. For example code V45.81, Aortocoronary bypass status, may be used with code V58.73, Aftercare following surgery of the circulatory system, NEC, to indicate the surgery for which the aftercare is being performed. Also, a transplant status code may be used following code V58.44, Aftercare following organ transplant, to identify the organ transplanted. A status code should not be used when the aftercare code indicates the type of status, such as using V55.0, Attention to tracheostomy with V44.0, Tracheostomy status."