Other specified effects of external causes, sequela

This code signifies a long-term or residual condition resulting from an external cause that is not specifically classified elsewhere. It indicates that the initial injury or adverse event has resolved, but its lasting effects are still present and require ongoing management or documentation.

Apply this code when documenting a chronic or permanent sequela of an external cause, such as a persistent neurological deficit after a poisoning, a chronic skin condition following a chemical burn, or a long-term functional impairment due to an environmental exposure, where a more specific sequela code is unavailable.

• Always sequence this code after the code for the specific sequela or condition being treated.
• Requires a seventh character 'S' to indicate sequela, meaning the initial injury or condition has healed, and the residual effect is being addressed.
• Do not use for acute effects; reserve for conditions that are a late effect of an external cause.