Adverse effect of antiviral drugs, sequela

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

Apply this code when documenting a patient presenting with a chronic health issue directly attributable to a past adverse effect of an antiviral drug, and the acute adverse effect itself is no longer active. Examples include chronic kidney disease following an acute kidney injury from an antiviral, or persistent neuropathy after an antiviral-induced peripheral neuropathy.

• Always sequence this code after the code for the specific sequela (e.g., chronic kidney disease, peripheral neuropathy).
• Ensure documentation clearly links the current chronic condition to a past adverse effect of an antiviral.
• Do not use for active adverse effects; instead, use the appropriate acute adverse effect code with the 7th character "A" for initial encounter.