Pain in left knee

This code signifies the presence of pain specifically localized to the left knee joint. It indicates a symptom rather than a definitive diagnosis of the underlying cause of the pain.

This code is appropriate when documentation clearly states "pain in left knee" without further specification of the etiology (e.g., osteoarthritis, sprain, meniscal tear). It is often used as a primary diagnosis when the cause of the knee pain is still under investigation or as a secondary diagnosis when the primary diagnosis doesn't fully capture the patient's presenting symptom.

• Always seek more specific codes if the underlying cause of the left knee pain is known and documented (e.g., M17.12 for primary osteoarthritis of the left knee).
• Do not use this code if the pain is bilateral; instead, use the appropriate bilateral knee pain code or separate codes for each knee if the laterality differs.
• Ensure documentation specifies "left knee" to support the laterality of this code.