Oth traum nondisp spondylolysis of 4th cervcal vert, 7thK

This code describes a non-displaced traumatic forward slippage of the C4 vertebra over the C5 vertebra, which is not healing as expected (nonunion). This specific code is used when the patient is receiving follow-up care for this previously diagnosed fracture.

This code is appropriate for encounters where a patient is being treated for a C4 spondylolisthesis that resulted from trauma, is not displaced, and has failed to unite. Documentation should clearly indicate a traumatic origin, the specific vertebral level (C4), the non-displaced nature, and the ongoing management of a nonunion.

• Ensure documentation specifies "traumatic" spondylolisthesis to differentiate from congenital or degenerative forms.
• Verify the encounter is for subsequent care of the nonunion, not initial treatment or routine follow-up for a healing fracture.
• Confirm the specific cervical vertebra (C4) and the "nondisplaced" characteristic are clearly documented.