Oth nondisp fx of third cervcal vert, subs for fx w nonunion

This code describes a fracture of the third cervical vertebra that is not displaced and is not a burst or other specified type. The fracture has failed to heal properly, resulting in a nonunion, and the patient is presenting for follow-up care after the initial treatment.

Use this code for patients presenting for ongoing management of a previously treated, nondisplaced C3 vertebral fracture that has developed a nonunion. Documentation should clearly state "nonunion" and specify the third cervical vertebra, along with the subsequent encounter status.

• Ensure documentation specifies "nondisplaced" and "nonunion" for the third cervical vertebra.
• Verify the encounter is for subsequent care, not the initial treatment or sequela.
• Differentiate from displaced fractures (S12.23x) or other specified types (S12.24x, S12.25x).