Dislocation of carpometacarpal joint of unsp thumb, init

This diagnosis code signifies the displacement of the joint connecting the carpal bones (wrist) to the metacarpal bone of the thumb, where the specific thumb (left or right) is not documented. This injury typically results in pain, swelling, and impaired function of the affected thumb.

This code is appropriate for the initial treatment of a thumb carpometacarpal joint dislocation when the laterality (left or right) is not specified in the medical record. It would be used for the first encounter where the injury is evaluated and definitive treatment, such as reduction, is initiated.

• Ensure the documentation clearly states "initial encounter" for this specific injury.
• If laterality (left or right thumb) is documented, a more specific code should be selected.
• Do not use this code for follow-up care or sequelae of the dislocation.