Strain flexor musc/fasc/tend finger at wrs/hnd lv, sequela

This code signifies a chronic or residual condition resulting from a previous strain to the flexor muscles, fascia, or tendons of a finger other than the thumb, at the wrist or hand level. This could include persistent pain, weakness, or limited range of motion long after the initial injury has healed.

Apply this code when documenting a patient presenting with ongoing symptoms directly attributable to a past flexor strain of a finger (excluding the thumb) in the hand or wrist region. This is appropriate for follow-up visits addressing long-term complications or sequelae of such an injury.

• Always use this code as a secondary diagnosis, with an external cause code (e.g., W50.0XXA) if the original injury's cause is still relevant.
• Ensure documentation clearly states the "sequela" nature of the current condition, indicating it's a residual effect of a past strain.
• Distinguish from acute or initial injury codes (S66.118A) and subsequent encounter codes (S66.118D).