Strain extensor musc/fasc/tend l thm at wrs/hnd lv, sequela

This code signifies a chronic or residual condition resulting from a previous injury to the extensor muscles, fascia, or tendons of the left thumb, specifically at the wrist and hand level. It indicates persistent symptoms or functional limitations stemming from a past strain.

Apply this code when documenting a patient presenting with ongoing pain, weakness, or restricted movement in the left thumb due to a prior extensor strain. This is appropriate for follow-up visits addressing the long-term effects of such an injury, rather than the initial acute event.

• Ensure documentation clearly states the injury is a "sequela" or "residual effect" of a previous strain.
• Confirm the injury location is specifically the left thumb extensor at the wrist/hand level.
• Do not use for acute or initial encounters; this code is exclusively for late effects.