Sltr-haris Type I physl fx low end ulna, unsp arm, 7thK

This code signifies a Salter-Harris Type I fracture affecting the growth plate at the lower end of the ulna, where the specific arm (left or right) is not documented. Importantly, this code is used for a subsequent encounter when the fracture has failed to heal properly, resulting in a nonunion.

This code is appropriate for follow-up visits where a patient is being managed for a previously diagnosed Salter-Harris Type I physeal fracture of the distal ulna, and imaging or clinical assessment confirms a nonunion. It should be used after the initial treatment phase, indicating ongoing care for the unhealed fracture.

• Ensure documentation clearly specifies "subsequent encounter" and "nonunion" for this specific fracture type.
• Verify that the laterality (left or right arm) is truly unspecified in the medical record before using this code.
• Distinguish from malunion, which implies healing in an incorrect position, whereas nonunion indicates a complete failure to heal.