Adverse effect of diagnostic agents, sequela

This code signifies a long-term or residual condition that persists after an adverse reaction to a diagnostic agent. This means the immediate adverse effect has resolved, but a lasting health problem remains as a direct consequence of that initial reaction. The sequela could be a chronic organ dysfunction, permanent tissue damage, or other lasting impairment.

Use this code when documenting a patient's current condition that is a direct result of a past adverse effect from a diagnostic agent (e.g., contrast dye, radiopharmaceuticals, or other substances used for diagnostic purposes). This applies when the acute adverse event has passed, but the patient continues to experience a chronic or permanent health issue attributable to that event. Examples include chronic kidney disease following an acute kidney injury from contrast dye, or persistent neurological deficits after an allergic reaction to a diagnostic agent.

• Always code the specific sequela first, followed by this code to indicate the etiology.
• Ensure documentation clearly links the current chronic condition to a previous adverse effect of a diagnostic agent.
• This code is for the sequela only; do not use it for the initial acute adverse effect.