Oth traum nondisp spondylolysis of 7th cervcal vert, 7thK

This code signifies a traumatic, non-displaced forward slippage of the C7 vertebra over the vertebra below it, specifically when the fracture has failed to heal properly. It indicates that the patient is in a later stage of care for this unhealed fracture, beyond the initial treatment phase.

Apply this code for patients presenting for follow-up care, ongoing treatment, or management of a C7 traumatic spondylolisthesis that has not united. Documentation must clearly state "nonunion" of the fracture and specify the seventh cervical vertebra. This code is appropriate after the initial encounter for the fracture.

• Ensure documentation explicitly states "nonunion" and "subsequent encounter."
• Distinguish from displaced spondylolisthesis (S12.652-) and other cervical levels.
• Always sequence after the primary reason for the subsequent encounter, if applicable.