Poisoning by unsp agents aff the cardiovasc sys, undet, subs

This code signifies a poisoning event involving an unknown substance that primarily impacts the cardiovascular system, where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined. It is used when the patient is receiving follow-up care for the sequelae of this poisoning after the initial treatment phase.

This code is appropriate for patients presenting for ongoing management of cardiovascular complications (e.g., arrhythmias, heart failure, hypertension) resulting from an unidentifiable cardiotoxic agent. It applies when the initial acute care for the poisoning has concluded, and the patient is now in a recovery or long-term management phase.

• Always sequence this code after the primary diagnosis for the specific cardiovascular condition being treated.
• Ensure documentation clearly states the poisoning agent is "unspecified" and the intent is "undetermined."
• Verify that the encounter is for follow-up care, not the initial acute treatment, to justify the "D" seventh character.