Open bite of unsp great toe with damage to nail, sequela

This code describes a long-term complication or late effect resulting from an open bite injury to an unspecified great toe, specifically involving damage to the toenail. This indicates that the initial injury has healed, but residual issues related to the nail persist.

This code is appropriate when documenting a patient presenting with a sequela (e.g., chronic nail deformity, onycholysis, or persistent infection related to the nail) that is directly attributable to a past open bite injury of the great toe. It should be used after the acute phase of the original injury has passed.

• Always assign a sequela code (S91.253S) as a secondary diagnosis, following the code for the specific sequela being treated.
• Ensure documentation clearly links the current nail damage to a previous open bite injury of the great toe.
• Do not use this code for acute injuries; instead, use the appropriate acute injury code.