Injury of digital nerve of unspecified thumb, init encntr

This diagnosis code indicates damage to a digital nerve of the thumb, where the specific nerve (e.g., ulnar or radial digital nerve) is not documented. This injury could result from various traumas, leading to sensory or motor deficits in the affected thumb.

Apply this code when a patient presents with an acute injury to a thumb's digital nerve, and the medical record does not specify which particular digital nerve was affected. This is appropriate for the initial treatment of such an injury, prior to any subsequent care or healing.

• Ensure the documentation clearly states an injury to a digital nerve of the thumb, and not a more general nerve injury.
• Verify that the encounter is indeed the initial treatment for this specific injury.
• If the specific digital nerve is identified (e.g., ulnar or radial), a more precise code from the S64.3 series should be used.