Primary blast injury of ascending colon, initial encounter

This code signifies a direct injury to the ascending colon resulting from a primary blast wave. This type of injury is caused by the overpressure component of an explosion, leading to barotrauma of gas-filled organs. It specifically excludes injuries from penetrating fragments or blunt trauma from being thrown.

Use this code for patients presenting with symptoms such as abdominal pain, distension, or signs of perforation following exposure to an explosion, where diagnostic imaging (e.g., CT scan) or surgical exploration confirms a blast-related injury to the ascending colon. This code is appropriate for the initial treatment phase of such an injury.

• Ensure documentation clearly specifies "primary blast injury" and not secondary (fragmentation) or tertiary (impact) blast injuries.
• Verify the injury site is the ascending colon; other colon segments have different codes.
• The "A" suffix indicates an initial encounter for active treatment of the injury.