S92.313S Displaced fracture of first metatarsal bone, unspecified foot, sequela

Name of the Condition

• Displaced fracture of first metatarsal bone, unspecified foot, sequela
• ICD-10 Code: S92.313S

Summary

A displaced fracture of the first metatarsal bone, unspecified foot, sequela refers to a break in the long bone at the base of the big toe where the bone fragments remain shifted out of their normal alignment, and the condition is a late effect of the initial injury. This sequela indicates the fracture has healed but left residual displacement, potentially affecting function or causing chronic symptoms. The first metatarsal, being the largest and most weight-bearing metatarsal, is prone to such complications after trauma.

Causes

The sequela arises from a prior displaced fracture of the first metatarsal bone, unspecified foot, where the bone fragments did not fully realign during healing. The original injury typically resulted from direct trauma, such as a fall, sports injury, or impact, leading to displacement that persisted or developed into a chronic state.

Risk Factors

• Inadequate initial treatment or immobilization of the original fracture
• High-impact activities or repetitive stress on the foot
• Underlying bone conditions (e.g., osteoporosis) that impair healing
• Advanced age, which may reduce bone density and healing capacity
• Previous foot injuries or fractures that compromise structural integrity

Symptoms

• Chronic pain or discomfort at the fracture site
• Swelling or tenderness that persists beyond the typical healing period
• Difficulty bearing weight or walking, especially on uneven surfaces
• Possible visible or palpable deformity of the big toe or foot
• Stiffness or reduced range of motion in the affected foot

Diagnosis

Diagnosis involves a physical examination to assess for residual displacement, tenderness, or deformity. Imaging tests, such as X-rays or CT scans, are used to evaluate the healed fracture and confirm the extent of displacement. The history of the original injury and healing timeline is critical to establishing the sequela.

Treatment Options

Treatment focuses on managing symptoms and improving function. Options may include orthotic devices or supportive footwear to redistribute weight and reduce stress on the affected bone. Physical therapy can help restore mobility and strength. In severe cases, surgical intervention to realign the bone or remove scar tissue may be considered, though this is less common for sequela.

Prognosis and Follow-Up

Prognosis depends on the degree of residual displacement and functional impact. Most patients experience improved symptoms with conservative management, but chronic pain or mobility issues may persist. Regular follow-up with a healthcare provider is recommended to monitor for complications and adjust treatment as needed.

Complications

• Chronic pain or discomfort
• Arthritis or joint degeneration due to misalignment
• Reduced mobility or gait abnormalities
• Increased risk of future fractures in the affected area
• Nerve or soft tissue irritation from persistent displacement

Lifestyle & Prevention

• Wear supportive, well-fitting footwear to reduce stress on the foot
• Avoid high-impact activities that strain the first metatarsal
• Maintain bone health through a balanced diet and regular exercise
• Use protective gear during sports or activities with fall risks
• Address underlying conditions (e.g., osteoporosis) to support healing

When to Seek Professional Help

Seek medical attention if chronic pain worsens, swelling increases, or mobility significantly declines. Prompt evaluation is necessary if new deformity or signs of infection (e.g., redness, warmth) develop, as these may indicate complications requiring intervention.

Tips for Medical Coders

Document the sequela status clearly, as this code is used for late effects of the initial fracture. Ensure the record specifies the residual displacement and its impact on function. Include details of the original injury and healing timeline to support the sequela diagnosis. Avoid using this code for acute fractures or initial encounters.