Injury of unspecified blood vessel at neck level, sequela

This code signifies a long-term complication or late effect resulting from an injury to an unspecified blood vessel in the neck region. It indicates that the initial acute injury has resolved, but residual problems or conditions persist due to the original trauma.

Apply this code when documentation clearly indicates a sequela (e.g., chronic pain, nerve damage, vascular insufficiency, scar tissue formation) directly attributable to a past, unspecified blood vessel injury in the neck. The patient's current condition must be a direct consequence of the original injury, not an acute or subsequent event.

• Ensure the documentation explicitly states "sequela" or "late effect" and links the current condition to a previous neck blood vessel injury.
• Avoid using this code for acute or initial injury encounters; those require codes from the acute injury chapter.
• Always sequence the sequela code first, followed by codes for the specific manifestation(s) of the sequela.