Displ commnt fx unsp patella, subs for clos fx w nonunion

This code describes a comminuted fracture of the kneecap (patella) that is out of alignment (displaced) and the specific side (left or right) is not documented. The fracture has not healed properly (nonunion) and the patient is receiving follow-up care for this condition, which is being managed without surgical intervention (closed fracture treatment).

Use this code for a patient presenting for ongoing management of a previously diagnosed displaced comminuted patellar fracture that has failed to unite, where the laterality of the patella was not specified in the medical record. This applies to encounters for cast changes, physical therapy, or medication management related to the nonunion, as long as no open reduction or internal fixation is performed during the encounter.

• Ensure documentation clearly states "nonunion" and "subsequent encounter" for a closed fracture.
• Verify that the laterality (left or right) of the patella is not specified in the medical record to justify using the "unspecified" option.
• Do not use this code if the fracture is healing normally or if an open procedure is performed during the encounter.