Congenital metatarsus primus varus, unspecified foot

This code describes a congenital foot deformity where the first metatarsal bone (the long bone connecting to the big toe) is angled inward, away from the other metatarsals. This inward deviation is present at birth and affects an unspecified foot. It is often associated with hallux valgus (bunion) later in life.

Use this code when documentation clearly indicates a congenital inward angulation of the first metatarsal, without specifying laterality (left or right foot). This diagnosis is typically made by a pediatrician or orthopedist based on physical examination and imaging studies. It is appropriate for initial diagnosis and follow-up of this specific congenital foot anomaly.

• Ensure documentation specifies "congenital" to differentiate from acquired conditions.
• Avoid using this code if laterality (left or right foot) is documented; more specific codes exist.
• Consider co-occurring conditions like hallux valgus (M20.1-) if also documented, as they are frequently linked.