Unspecified disorder of patella, left knee

This code signifies a general, unspecified problem affecting the left kneecap. It indicates that a disorder of the patella is present, but the specific nature or cause of the condition (e.g., dislocation, chondromalacia, fracture) has not been definitively diagnosed or documented.

This code is appropriate when documentation clearly states a disorder of the left patella but lacks further specificity regarding the type of disorder. It can be used in initial encounters where a definitive diagnosis is pending or when the provider explicitly states "unspecified patellar disorder, left knee."

• Avoid using this code if a more specific diagnosis of the patellar disorder is available in the medical record.
• Always query the provider for greater specificity if documentation allows, as more specific codes often provide better reimbursement and clinical data.
• Differentiate from unspecified disorders of the right knee (M22.91) or bilateral knees (M22.90).