Contusion of unsp thumb with damage to nail, init encntr

This code signifies a bruise to an unspecified thumb that also involves injury to the thumbnail or nail bed. The damage to the nail could range from a simple subungual hematoma to a more significant crush injury affecting the nail structure. This diagnosis indicates the initial presentation of such an injury.

This code is appropriate for documenting the first encounter for a patient presenting with a contusion of the thumb where the nail is visibly affected, but the specific thumb (right or left) is not documented or is unknown. It applies when there is no open wound or fracture, and the primary injury is a blunt force trauma to the thumb with associated nail damage.

• Ensure documentation clearly states "unspecified thumb" or lacks laterality for accurate coding.
• If an open wound or fracture is present, a more specific code from the S61 or S62 series would be more appropriate.
• This code is for the initial encounter; subsequent encounters for the same injury would require a different 7th character.