War operations involving friendly fire, subsequent encounter

This code describes injuries or conditions sustained by military personnel due to accidental discharge or misdirected fire from their own forces during a war or armed conflict. It specifically indicates that this is for a subsequent encounter, meaning the patient is receiving follow-up care for an injury that occurred previously.

Use this code when documenting ongoing treatment, rehabilitation, or follow-up appointments for a service member who was injured in a friendly fire incident during war operations. This applies to situations like physical therapy for a chronic injury, mental health services for PTSD related to the event, or follow-up surgical procedures.

• Always pair this external cause code with a primary diagnosis code describing the specific injury or condition.
• Ensure the documentation clearly indicates the injury was sustained during war operations and was due to friendly fire.
• Verify that the encounter is indeed "subsequent" and not the initial treatment for the injury.