Adverse effect of unspecified topical agent, sequela

This code signifies a lasting health problem or condition that developed as a direct consequence of a past adverse reaction to a topical agent, where the specific agent is unknown. It indicates that the initial adverse effect has resolved, but a residual complication or chronic issue remains.

Apply this code when documentation clearly links a current, chronic, or residual condition to a previous adverse effect from an unidentifiable topical medication or substance. This is appropriate for conditions like persistent dermatitis, scarring, or chronic pain directly attributable to an old, unspecified topical exposure.

• Always sequence this code after the code for the specific sequela (e.g., chronic dermatitis, scar).
• Ensure documentation explicitly states the "sequela" nature of the condition and its link to a past adverse effect.
• Only use when the specific topical agent cannot be identified from the medical record.