Inj extn musc/fasc/tend at forearm level, right arm, sequela

This code signifies a long-term or residual effect from a past injury to an extensor muscle, fascia, or tendon in the right forearm, excluding specific named muscles. This indicates that the acute injury has resolved, but the patient continues to experience symptoms or functional limitations directly attributable to that prior trauma.

Apply this code when documenting chronic pain, weakness, stiffness, or other persistent issues in the right forearm's extensor compartment that are a direct consequence of an old injury. This is appropriate for follow-up encounters where the primary treatment for the initial injury is complete, but ongoing management of its sequelae is required.

• Always use this sequela code as a secondary diagnosis, following a code for the specific symptom or condition being treated (e.g., chronic pain).
• Ensure documentation clearly links the current condition to a past injury of the right forearm extensor structures.
• Distinguish from acute injuries, which would use active injury codes (e.g., S56.591A, D, S).