Unspecified adverse effect of drug or medicament, sequela

This code signifies a long-term or residual condition resulting from an adverse reaction to a medication, where the specific nature of the adverse effect is not documented. It indicates that the initial drug-related harm has resolved, but a lasting consequence persists.

Apply this code when a patient presents with a chronic or permanent health problem clearly attributed to a past adverse drug event, and the specific type of adverse effect (e.g., rash, organ damage) is not specified in the medical record. This is appropriate for conditions that are no longer acute but are a direct sequela of the drug exposure.

• Always sequence this code after the code describing the specific sequela (e.g., chronic kidney disease, neuropathy).
• Ensure documentation clearly links the current condition to a prior adverse drug event, even if the specific effect is unspecified.
• Avoid using this code for acute or currently active adverse drug reactions; those require codes from the T36-T50 range with appropriate seventh characters.