Unspecified injury of muscle and tendon of head, sequela

This code signifies a long-term or late effect of an unspecified injury to the muscles or tendons of the head. It indicates that the initial acute injury has resolved, but the patient continues to experience residual symptoms or complications directly attributable to that past injury.

Use this code when documentation clearly indicates a sequela (e.g., chronic pain, weakness, limited range of motion) resulting from a previous, unspecified muscle or tendon injury to the head. This code is appropriate when the acute phase of the original injury has passed, and the current encounter addresses the lasting effects.

• Always sequence the sequela code first, followed by codes for the specific residual condition(s) if known.
• Ensure documentation explicitly states "sequela," "late effect," or similar terminology linking current symptoms to a past injury.
• Avoid using this code for acute injuries; instead, use codes from the S00-S09 range for initial encounters.