Adverse effect of iminostilbenes, sequela

This code signifies a long-term or residual condition resulting from an adverse reaction to iminostilbene medications, such as carbamazepine or oxcarbazepine. These sequelae are persistent health problems that arose directly from an initial adverse effect of the drug, rather than the acute adverse event itself.

Apply this code when documenting a chronic or permanent condition that is a direct consequence of a past adverse effect from an iminostilbene. Examples include persistent neurological deficits following drug-induced encephalopathy, or chronic dermatological issues after a severe skin reaction to the medication. This code is used after the acute phase of the adverse effect has resolved, but its lasting impact remains.

• Always sequence this code after the code(s) for the specific sequela being documented.
• Ensure documentation clearly links the current chronic condition to a prior adverse effect of an iminostilbene.
• Do not use this code for acute adverse effects; instead, use the appropriate acute adverse effect code (e.g., T42.1X5A).