when coding late effects, the code for the what is usually sequenced first

When coding late effects, the first thing to determine is the underlying condition or event that caused the late effect. This is crucial because late effects are residual effects or complications that occur after the acute phase of an illness or injury.

To identify the underlying condition or event, you will typically refer to the medical documentation and identify the relevant diagnosis code. This diagnosis code represents the initial condition or event that occurred in the past.

Once you have the diagnosis code related to the underlying condition or event, you can then proceed to sequence it as the principal diagnosis. The principal diagnosis is the most significant condition that is primarily responsible for the patient's care.

After sequencing the principal diagnosis, you can proceed to code the late effect. The specific code for the late effect will depend on the coding system being used, such as the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM). Within this coding system, there are specific codes designated for late effects using an extension of the main condition code.

In summary, when coding late effects, the code for the underlying condition or event is typically sequenced first as the principal diagnosis. Once the principal diagnosis is determined, the code for the late effect can be assigned based on the relevant coding guidelines and conventions.