Unsp traum nondisp spondylolysis of 2nd cervcal vert, 7thK

This code describes a traumatic, non-displaced spondylolisthesis of the C2 vertebra where the specific type of spondylolisthesis is not documented. The "subsequent encounter" indicates ongoing treatment for a fracture that has not healed properly (nonunion).

Use this code for follow-up encounters when a patient is receiving care for a previously diagnosed, traumatic, non-displaced C2 spondylolisthesis that has developed a nonunion. Documentation should clearly state "subsequent encounter," "nonunion," and specify the C2 vertebra.

• Ensure documentation specifies "nonunion" for the 7th character 'K'.
• Verify the spondylolisthesis is traumatic and non-displaced; otherwise, a different code may be appropriate.
• Do not use for initial encounters or for malunion (use 7th character 'M' for malunion).