Adverse effect of penicillins, sequela

This code signifies a long-term or residual condition resulting from an adverse reaction to penicillin. It indicates that the initial adverse effect has resolved, but a lasting health problem or complication persists due to that prior event.

Use this code when documenting a patient presenting with a chronic condition directly attributable to a past adverse effect of penicillin. Examples include permanent organ damage, chronic neurological deficits, or persistent dermatological issues that developed as a consequence of a penicillin reaction.

• Always sequence this code after the code for the specific sequela (e.g., chronic kidney disease, peripheral neuropathy).
• Ensure documentation clearly links the current condition to a past adverse effect of penicillin.
• Do not use for acute adverse effects; those require codes from the "A" or "D" categories, or the "T36.0X5A/D" codes.