Strain extensor musc/fasc/tend r idx fngr at forarm lv, init

This diagnosis code signifies a non-traumatic overstretching or tearing of the extensor muscles, their surrounding fascia, or tendons specifically located in the right index finger, with the injury site extending into the forearm region. This injury typically results in pain, swelling, and impaired movement of the affected finger.

Use this code for patients presenting with an acute injury to the extensor mechanism of their right index finger, where the strain originates or extends into the forearm. This is appropriate for initial evaluations and treatments of such an injury.

• Ensure documentation specifies the right index finger and involvement at the forearm level.
• Verify the encounter is indeed the "initial encounter" for this specific injury.
• Distinguish from sprains (ligamentous injury) or more severe conditions like avulsions or ruptures.