Inj intrinsic musc/fasc/tend l idx fngr at wrs/hnd lv, subs

This code signifies an injury to the intrinsic muscles, fascia, or tendons within the left index finger, specifically at the wrist or hand level. It covers various types of damage beyond a simple strain, such as a tear or rupture, affecting the fine motor control and movement of the digit.

Apply this code for follow-up encounters when a patient is receiving active treatment for an injury to the intrinsic structures of the left index finger, or during the healing phase. This includes scenarios like physical therapy, wound care, or medication management for a previously diagnosed injury.

• Ensure the documentation specifies the left index finger and the injury location as the wrist or hand level.
• Verify that the encounter is for subsequent care, not the initial treatment of the injury.
• Distinguish from sprains (S66.52-) and other specified injuries (S66.50-) to ensure accurate coding.