Strain of intrns musc/fasc/tend r thm at wrs/hnd lv, sequela

This code signifies a chronic or residual condition resulting from a previous injury to the intrinsic muscles, fascia, or tendons of the right thumb, specifically at the wrist and hand level. It indicates that the initial acute injury has resolved, but ongoing symptoms or functional limitations persist.

Apply this code when documentation clearly indicates a sequela (e.g., chronic pain, weakness, stiffness, limited range of motion) stemming from an old strain of the right thumb's intrinsic structures. This is appropriate for follow-up encounters addressing long-term effects, not the initial acute injury.

• Ensure the documentation explicitly states "sequela," "residual," or "late effect" to justify the 7th character 'S'.
• Verify the injury location is precisely the right thumb's intrinsic muscles, fascia, or tendons at the wrist/hand level.
• Do not use this code for acute or initial injury encounters; those require an appropriate acute injury code.