Varus deformity, not elsewhere classified, right knee

This code signifies an outward angulation of the lower leg relative to the thigh at the right knee joint, often referred to as "bow-leggedness." This deformity results in increased stress on the medial compartment of the knee.

Apply this code when documentation explicitly states a varus deformity of the right knee, not attributable to a congenital condition, trauma, or other specific etiology classified elsewhere. Supporting documentation should include physical exam findings noting the angulation and laterality.

• Ensure documentation specifies "right knee" to avoid laterality errors.
• Distinguish from valgus deformity (knock-knee), which is an inward angulation.
• Verify that the varus deformity is not secondary to a more specific underlying condition (e.g., osteoarthritis, fracture malunion) that would be coded first.