Q66.229 Congenital metatarsus adductus, unspecified foot

Name of the Condition

• Congenital Metatarsus Adductus, Unspecified Foot

Summary

Congenital metatarsus adductus is a structural foot deformity present at birth characterized by an inward deviation of the forefoot. This condition affects foot alignment and may impact gait or footwear fitting as the child grows. The unspecified foot designation indicates the condition affects one or both feet without further specification.

Causes

The exact cause is not fully understood, but it is believed to involve a combination of genetic factors and disruptions during fetal development. Abnormalities in bone or soft tissue development may contribute to the deformity.

Risk Factors

• Family history of congenital foot deformities
• Intrauterine positioning (e.g., limited space, breech presentation)
• Maternal health conditions during pregnancy
• Prematurity or low birth weight

Symptoms

• Visible inward deviation of the forefoot at birth
• Altered forefoot alignment (e.g., inward positioning)
• Limited range of motion in the foot or toes
• Difficulty fitting standard footwear as the child grows

Diagnosis

Physical examination by a healthcare provider to assess forefoot alignment and metatarsal positioning. Imaging studies (e.g., X-rays) may be used to evaluate bone structure in older children. Prenatal ultrasound may detect certain deformities before birth in some cases.

Treatment Options

• Observation for mild cases
• Orthotic devices or bracing to support proper alignment
• Physical therapy to improve flexibility and strength
• Surgical intervention in severe or persistent cases

Prognosis and Follow-Up

With early intervention, many children achieve improved alignment and function. Regular follow-up is important to monitor development and adjust treatment as needed. Most cases resolve with appropriate management, though some may require ongoing care.

Complications

• Persistent deformity leading to gait abnormalities
• Difficulty with footwear or activity participation
• Potential for secondary musculoskeletal issues if untreated

Lifestyle & Prevention

• Ensure proper footwear that accommodates foot shape
• Encourage activities that promote natural foot movement
• Avoid restrictive footwear or positioning that may worsen alignment
• Follow healthcare provider guidance for monitoring and intervention

When to Seek Professional Help

• Noticeable inward forefoot deviation at birth or during infancy
• Difficulty fitting shoes or altered walking pattern
• Pain or functional limitations in the foot or leg
• Concerns about foot development or alignment

Tips for Medical Coders

Document the specific foot affected (right, left, or bilateral) when available, as this may impact coding specificity. For unspecified foot, use this code when the documentation does not specify laterality. Ensure the diagnosis is clearly supported by clinical findings and aligns with the congenital nature of the condition.