Subluxation of C5/C6 cervical vertebrae, sequela

This code describes a long-term or late effect of a prior subluxation involving the C5 and C6 cervical vertebrae. This indicates that the initial injury has resolved, but residual symptoms or structural changes persist as a consequence. It signifies a chronic or ongoing issue stemming from the original C5/C6 subluxation.

Use this code when documentation clearly indicates a sequela (e.g., chronic pain, instability, degenerative changes) resulting from a past subluxation of the C5/C6 vertebral segment. This code is appropriate when the acute phase of the subluxation has passed, and the patient is being treated for the lasting effects. Documentation should specify the C5/C6 level and the "sequela" nature of the condition.

• Always use an external cause code (V00-Y99) to describe the cause of the original injury, if known and applicable.
• Do not use this code for acute or current subluxations; those require codes from the acute injury section.
• Ensure the documentation explicitly states "sequela," "late effect," or similar terminology to support the use of the 7th character 'S'.