What type of codes should not be used for aftercare of conditions like injuries or poisonings?

Z codes are designed for use in specific situations that may not involve a current diagnosis. They are often utilized for factors influencing health status, like aftercare and follow-up visits. However, they are not intended for coding active conditions or the consequences of injuries or poisonings.

In contrast, X codes are used to identify external causes of injuries, T codes are for coding specific types of injuries and poisonings, while M codes are generally used for musculoskeletal conditions. Since aftercare for injuries or poisonings typically involves monitoring or reporting on the condition after initial treatment, the appropriate coding would usually fall to T codes or potentially X codes, depending on the specific context. Thus, Z codes should not be applied in these scenarios, primarily because they do not capture the ongoing care or management of active injuries or poisonings.