Which character in a code signifies a subsequent encounter in Chapter 19?

In the context of medical coding, particularly within the ICD-10 coding structure outlined in Chapter 19, which pertains to injury, poisoning, and certain other consequences of external causes, each character in a code represents specific information. In this case, the character that signifies a subsequent encounter is the character "C."

When coding for a subsequent encounter, it is essential to differentiate it from initial encounters and sequelae (complications that arise after the initial injury). The use of "C" in the coding indicates that a patient is being evaluated or treated for an ongoing issue that is related to a previous encounter. This is especially relevant in the management of injuries or conditions where follow-up visits are common.

Subsequent codes are necessary for tracking the patient's progress in recovering from an injury or illness. Therefore, in the coding structure utilized for Chapter 19, understanding the significance of the character "C" plays a crucial role in accurately coding the patient’s diagnosis and ensuring proper documentation of their medical history and treatment.