Adverse effect of anthelminthics, sequela

This code signifies a lasting or residual health problem resulting from an adverse reaction to an anthelminthic medication. It indicates that the initial acute adverse effect has resolved, but a chronic or permanent condition persists as a consequence. This could include organ damage, neurological deficits, or other long-term complications.

Use this code when documenting a patient's current condition that is a direct, long-term consequence of a past adverse drug event involving an anthelminthic. This is appropriate for follow-up visits where the sequela is being managed, rather than the initial acute reaction. Examples include chronic liver damage after a severe anthelminthic reaction or persistent neuropathy.

• Always code the specific sequela first, followed by this code to indicate the etiology.
• Ensure documentation clearly links the current condition to the past anthelminthic adverse effect.
• Do not use this code for acute adverse effects; those are coded with the appropriate acute adverse effect code.