Congenital pes planus, left foot

This diagnosis code signifies a congenital flatfoot deformity affecting the left foot. It indicates a structural abnormality present at birth where the arch of the left foot is absent or significantly collapsed, often leading to the entire sole touching the ground.

Apply this code when documentation explicitly states a diagnosis of congenital pes planus specifically of the left foot. Supporting documentation should include physician notes detailing the congenital nature of the flatfoot and laterality.

• Ensure laterality is clearly documented as "left foot" to avoid unspecified or bilateral coding.
• Distinguish from acquired pes planus (M21.4-) which has different etiology and coding.
• Code any associated symptoms or complications, such as pain or gait disturbance, as secondary diagnoses.