Other adverse effects, not elsewhere classified, sequela

This code signifies a long-term or late-onset adverse effect from an external cause that is not specifically categorized elsewhere in the ICD-10-CM system. It indicates that the initial adverse event has resolved, but a residual condition or complication persists as a direct result. This sequela represents the lasting impact of the original adverse effect.

Use this code when documenting a chronic or permanent condition that is a direct consequence of a past adverse effect, and no more specific sequela code is available. Examples include persistent organ damage following a severe drug reaction, or chronic neurological deficits resulting from a past toxic exposure, where the acute event has concluded.

• Always sequence this code after the code for the specific sequela it describes.
• Ensure the medical record clearly links the current condition to a past adverse effect.
• Avoid using this code for acute or ongoing adverse effects; those require different codes.