Inj extn musc/fasc/tend r little finger at wrs/hnd lv, subs

This code signifies an injury to any extensor muscle, fascia, or tendon of the right little finger, specifically located at the wrist or hand level, that is being treated during a subsequent encounter. This includes various types of damage beyond a simple strain, such as a tear, laceration, or rupture, affecting the structures responsible for extending the little finger.

This code is appropriate for follow-up visits, rehabilitation sessions, or subsequent surgical interventions for a previously diagnosed "other injury" to the extensor components of the right little finger at the wrist or hand. It should be used when the patient is receiving active treatment for the injury after the initial encounter.

• Ensure the documentation clearly specifies the right little finger and the injury location at the wrist or hand level.
• Verify that the encounter is indeed a subsequent one, indicating ongoing care for the injury.
• Differentiate "other injury" from a simple strain (S66.316D) or sprain.