Unspecified subluxation of unspecified patella, init encntr

This code signifies a partial dislocation of the kneecap where the specific side (left or right) is not documented, and the cause or type of subluxation is unknown. It indicates that the patella has moved out of its normal alignment within the trochlear groove but has not fully separated from the joint.

This code is appropriate for the initial encounter with a patient presenting with symptoms of a patellar subluxation, such as knee pain, instability, or a feeling of the kneecap "giving way," when the physician has not yet specified the affected side or the exact nature of the subluxation. It is used when documentation is insufficient to assign a more specific code.

• Only use this code when the laterality of the patella is truly unspecified in the medical record.
• Avoid using this code if the documentation provides enough detail to select a more specific subluxation code (e.g., recurrent, traumatic).
• Ensure "initial encounter" is clearly documented to support the "A" seventh character.