Strain of extensor musc/fasc/tend thmb at wrs/hnd lv, subs

This code signifies a non-traumatic injury to the extensor muscles, fascia, or tendons of an unspecified thumb, located at the wrist or hand level. The injury is characterized by overstretching or tearing of these tissues, resulting in pain, swelling, and impaired thumb movement. This specific code is for a subsequent encounter, meaning the patient is receiving follow-up care for an injury that has already been initially treated.

Use this code for patients presenting for ongoing treatment, such as physical therapy, re-evaluation, or medication management, for a previously diagnosed extensor strain of the thumb. This applies when the initial injury occurred at the wrist or hand level and the specific thumb (left or right) was not documented.

• Ensure documentation clearly indicates a "subsequent encounter" for the thumb extensor strain.
• Verify the injury location is at the wrist or hand level, not a more proximal or distal site.
• Only use this code when the specific thumb (left or right) is not specified in the medical record.