Unspecified complication of procedure, sequela

This code signifies a long-term or late-effect complication arising from a previous medical or surgical procedure, where the specific nature of the complication cannot be identified. It indicates that the patient is experiencing a persistent health problem directly attributable to a past intervention, but the exact type of complication remains unknown or undocumented.

Use this code when documentation clearly states a "sequela of procedure" or "late complication of procedure" without further specificity regarding the type of complication (e.g., infection, hemorrhage, mechanical issue). It is appropriate for follow-up encounters where the patient presents with a chronic, uncharacterized issue stemming from a prior surgery or medical treatment.

• Only use this code when no other, more specific complication code (T80-T88) can be assigned.
• Always strive for greater specificity if the documentation allows; query the provider if possible.
• This code is for sequelae, meaning the acute phase of the complication has passed, and the patient is experiencing residual effects.