Unsp nondisp fx of 5th cervcal vert, subs for fx w nonunion

This code describes a situation where a patient has a fracture of the fifth cervical vertebra that is not displaced and the specific type of fracture is not documented. The "K" seventh character indicates that this is a subsequent encounter for a fracture that has failed to heal properly, resulting in a nonunion.

Use this code for follow-up encounters where a previously diagnosed, unspecified, nondisplaced C5 vertebral fracture is being treated for nonunion. Documentation should clearly state "nonunion" and specify the fifth cervical vertebra, along with the nondisplaced nature of the fracture.

• Ensure documentation explicitly states "nonunion" for the seventh character "K."
• Verify the specific cervical vertebra (C5) is documented; otherwise, an unspecified cervical vertebra code may be more appropriate.
• Distinguish from malunion (seventh character P) or routine healing (seventh character D, G, or H).