Inj intrns musc/fasc/tend unsp finger at wrs/hnd lv, sequela

This code describes a long-term complication or late effect resulting from a previous injury to the intrinsic muscles, fascia, or tendons of an unspecified finger. This could include conditions like chronic pain, stiffness, weakness, or deformity that persist after the initial injury has healed. The injury's location is specifically at the wrist and hand level.

Use this code when documenting a sequela (late effect) of an injury to the intrinsic muscles, fascia, or tendons of a finger, where the specific finger is not documented. This applies to conditions presenting after the acute phase of the original injury has passed, such as chronic tenosynovitis, contractures, or persistent functional impairment.

• Always sequence this sequela code after the code for the specific condition or manifestation of the sequela.
• Ensure documentation clearly states the injury is a "sequela" or "late effect" and specifies the intrinsic muscles, fascia, or tendons of a finger.
• If the specific finger is known, a more precise code from the S66.5- series should be used instead.