Explosion on board unspecified watercraft, sequela

This code indicates a health condition or injury that is a delayed effect or complication stemming from an explosion that occurred on an unspecified watercraft. It signifies that the initial acute event has passed, but the patient is still experiencing related medical issues.

Apply this code when documenting a patient's current medical condition that is a direct consequence of an explosion on a boat or ship, where the specific type of watercraft is not known or documented. This would be used for follow-up care, chronic conditions, or late-onset complications related to such an event.

• Always use in conjunction with a code for the specific sequela (e.g., T90.5XXA for sequela of intracranial injury).
• Ensure the "S" for sequela is the appropriate seventh character, indicating a complication or condition arising from an earlier injury.
• Do not use for acute injuries from the initial explosion; those require acute injury codes with an appropriate seventh character.