Q66.222 Congenital metatarsus adductus, left foot

Name of the Condition

• Congenital Metatarsus Adductus, Left Foot

Summary

Congenital metatarsus adductus is a structural foot deformity present at birth characterized by an inward deviation of the forefoot, specifically affecting the left foot in this case. This condition involves misalignment of the metatarsal bones, potentially impacting foot function and gait. It may lead to cosmetic or functional concerns as the child grows, though many cases resolve spontaneously or with minimal intervention.

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. Intrauterine positioning, such as limited space or breech presentation, may also play a role.

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 or upward 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 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 without long-term complications, but persistent deformities may require ongoing management.

Complications

• Persistent deformity requiring surgical correction
• Difficulty with footwear or gait abnormalities
• Associated musculoskeletal issues in severe cases

Lifestyle & Prevention

• Ensure proper footwear that accommodates foot shape
• Encourage natural foot movement and flexibility exercises
• Avoid restrictive footwear that may worsen deformity
• Maintain regular follow-up with a healthcare provider for monitoring

When to Seek Professional Help

• Visible or worsening foot deformity
• Difficulty walking or abnormal gait
• Pain or discomfort in the foot
• Inability to fit standard footwear

Tips for Medical Coders

When coding for congenital metatarsus adductus of the left foot, use the ICD-10-CM code Q66.222. Ensure documentation specifies the left foot and confirms the congenital nature of the condition. Include details about any associated symptoms, diagnostic findings, or treatment provided to support accurate coding.