Unsp nondisp fx of 7th cervcal vert, subs for fx w nonunion

This code describes a fracture of the seventh cervical vertebra that is not displaced and whose specific type is unknown. The patient is in a subsequent phase of care, and the fracture has failed to heal properly, resulting in a nonunion.

Use this code for follow-up encounters where a previously diagnosed, unspecified, nondisplaced C7 vertebral fracture is documented as having a nonunion. This applies when the patient is receiving ongoing treatment for the nonunion, such as bracing, physical therapy, or preparation for surgical intervention. Documentation should clearly state "nonunion" and specify the C7 vertebra.

• Ensure documentation explicitly states "nonunion" and "subsequent encounter" for this specific fracture.
• Do not use this code for initial treatment of the fracture or for routine follow-up without evidence of nonunion.
• Always sequence this code after any codes for external causes of injury, if applicable and still relevant to the current encounter.