Toxic effect of harmful algae and algae toxins, asslt, subs

This code signifies a toxic reaction resulting from exposure to harmful algae or their toxins, such as those found in red tides or cyanobacterial blooms. The exposure is non-accidental and intentionally inflicted by another person, and the patient is receiving follow-up care for this condition after the initial treatment.

Use this code when documenting subsequent encounters for a patient who was deliberately poisoned by harmful algae or their toxins. This applies to situations where the patient is returning for ongoing management, monitoring, or treatment of residual effects from the assault.

• Ensure documentation clearly states the toxic effect is due to harmful algae/algae toxins and was an intentional act by another.
• Verify the encounter is for subsequent care, not the initial treatment, to justify the "D" seventh character.
• Consider additional codes for specific symptoms or organ damage resulting from the toxic exposure.