Oth traum displ spondylolysis of 2nd cervcal vert, 7thK

This code signifies a forward displacement of the second cervical vertebra (C2) over the third (C3) due to a previous traumatic injury, specifically when the fracture has not healed properly (nonunion). This is a subsequent encounter, meaning the patient is receiving follow-up care for this unhealed fracture.

Apply this code for patients presenting for ongoing treatment of a previously diagnosed traumatic spondylolisthesis of C2 with documented nonunion. This includes follow-up appointments, imaging to assess nonunion status, or preparation for revision surgery. Documentation must clearly state "nonunion" of the C2 fracture and indicate a "subsequent encounter."

• Ensure documentation specifies "nonunion" and not merely delayed healing or malunion.
• Verify the specific cervical vertebra involved is C2, as other cervical levels have different codes.
• Confirm the encounter type is "subsequent" for fracture care, not initial or sequela.