Primary blast injury of duodenum, subsequent encounter

This code signifies a duodenal injury resulting from a primary blast event, such as an explosion, that is being treated during a follow-up visit. This type of injury can range from contusions to perforations of the duodenum, the first part of the small intestine. The "subsequent encounter" indicates ongoing care for the initial injury.

This code is appropriate for encounters where a patient is receiving continued treatment, monitoring, or rehabilitation for a previously diagnosed primary blast injury to the duodenum. Examples include follow-up appointments after surgery, during medical management of a less severe injury, or for complications arising from the initial trauma.

• Ensure documentation clearly states the injury is a primary blast injury and involves the duodenum.
• Verify the encounter is for subsequent care, not the initial treatment of the injury.
• Pair with external cause codes (V, W, X, Y codes) to fully describe the circumstances of the blast injury.