Lacerat extn/abdr musc/fasc/tend of thmb at forarm lv, subs

This code signifies a laceration, or deep cut, affecting the extensor or abductor muscles, fascia, and tendons of an unspecified thumb, specifically at the forearm level. This injury involves the structures responsible for extending or moving the thumb away from the hand, occurring proximal to the wrist joint.

This code is appropriate for follow-up encounters for patients previously diagnosed with such a laceration. This includes visits for wound care, cast changes, physical therapy, or monitoring healing progress after initial treatment. It should be used when the patient is receiving active treatment for the injury, not for sequelae or late effects.

• Ensure documentation specifies the injury is at the forearm level, not the hand or wrist.
• Verify this is a subsequent encounter for active treatment, not an initial encounter or for long-term complications.
• If the laterality (left or right thumb) is documented, a more specific code should be used.