Contusion of unspecified thumb with damage to nail, sequela

This code signifies a past injury to an unspecified thumb that involved both a bruise (contusion) and damage to the nail. The "sequela" designation indicates that this code is used to report a late effect or complication of the original injury, rather than the acute event itself. This could include ongoing pain, deformity, or functional impairment resulting from the initial trauma.

Use this code when documenting a patient presenting for follow-up care or treatment of a long-term consequence directly attributable to a contusion of an unspecified thumb with nail damage. This is appropriate for conditions like nail dystrophy, chronic pain, or scar tissue formation that developed after the initial injury has healed. Do not use for the initial acute injury.

• Always ensure the "S" (sequela) seventh character is appropriate for the encounter, indicating a late effect.
• Verify that the documentation clearly links the current condition to a past thumb contusion with nail involvement.
• Consider if a more specific thumb laterality (right or left) can be determined from the medical record, as more specific codes exist.