Inj extn/abdr musc/fasc/tend of r thm at forarm lv, init

This code signifies an injury to the extensor or abductor muscles, their surrounding fascia, or tendons of the right thumb, specifically located in the forearm region. This injury is not a sprain, strain, or laceration, but rather another type of damage such as a contusion, crush injury, or avulsion. The "A" suffix indicates that this is the initial encounter for the injury.

Use this code for a patient presenting with an acute, non-lacerating injury to the extensor or abductor musculotendinous unit of the right thumb, where the injury site is clearly documented as being in the forearm. This applies to conditions like a partial tear, contusion, or other specified damage to these structures at the forearm level during the initial treatment phase.

• Ensure documentation specifies the right thumb and the forearm level of the injury.
• Verify the injury is not a simple sprain/strain (S56.8) or an open wound (S51.-).
• Confirm this is the initial encounter for treatment; subsequent encounters will require different seventh characters.