Hallux valgus (acquired), left foot

This code signifies an acquired bunion deformity affecting the great toe of the left foot. It involves a lateral deviation of the great toe and medial deviation of the first metatarsal, often accompanied by bony prominence and soft tissue inflammation. This condition is typically progressive and can lead to pain, footwear difficulties, and functional impairment.

This code is appropriate when documentation clearly indicates a diagnosis of hallux valgus that has developed over time, rather than being present at birth, specifically affecting the patient's left foot. Supporting documentation should include physician notes detailing the deformity, laterality, and its acquired nature.

• Ensure documentation specifies "acquired" hallux valgus; congenital forms are coded differently.
• Always verify laterality (left, right, or bilateral) as distinct codes exist for each.
• Distinguish from hallux rigidus (M20.2-), which primarily involves degenerative arthritis of the great toe joint.