Strain of musc/fasc/tend at wrs/hnd lv, unsp hand, sequela

This code signifies a chronic or late-effect injury involving a muscle, fascia, or tendon in the wrist or hand, excluding those specifically identified in other S66.x codes. It indicates that the initial acute injury has resolved, but the patient continues to experience residual symptoms or complications related to the original strain.

Apply this code when documenting a patient presenting with persistent pain, weakness, limited range of motion, or other long-term issues in the wrist or hand, stemming from a previously sustained muscle, fascia, or tendon strain. This is appropriate when the specific muscle, fascia, or tendon involved is known, but no laterality (left or right hand) was documented for the original injury.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., chronic pain, muscle weakness).
• Ensure documentation clearly links the current condition to a past strain of a specified muscle, fascia, or tendon in the wrist or hand.
• Avoid using this code for acute injuries; it is strictly for sequelae.