Varus deformity, not elsewhere classified, left knee

This code signifies an inward angulation of the left knee, where the distal part of the limb (lower leg) deviates medially relative to the proximal part (thigh). This results in a "bow-legged" appearance of the left lower extremity, not attributable to congenital or traumatic causes specifically classified elsewhere.

Apply this code when documentation clearly indicates a diagnosed varus deformity affecting the left knee, without a more specific underlying cause like congenital malformation or fracture sequelae. This is appropriate for acquired or idiopathic varus deformities identified during physical examination and confirmed by imaging.

• Ensure laterality is accurately documented as "left knee."
• Differentiate from valgus deformity (knock-knee), which is an outward angulation.
• Look for documentation specifying "not elsewhere classified" or the absence of a more specific etiology.