S92.345P Nondisplaced fracture of fourth metatarsal bone, left foot, subsequent encounter for fracture with malunion

Name of the Condition

• Nondisplaced fracture of fourth metatarsal bone, left foot, subsequent encounter for fracture with malunion
• ICD-10 code: S92.345P

Summary

A nondisplaced fracture of the fourth metatarsal bone in the left foot is a break in the long bone of the forefoot where the bone fragments remain in their normal alignment. This code represents a subsequent encounter for treatment, indicating the fracture has healed with malunion (abnormal alignment). Management focuses on addressing the malunion and managing symptoms related to the healed fracture.

Causes

Direct trauma to the foot, such as a fall, impact during sports, or a heavy object dropped on the foot, is a common cause. Malunion may occur if the fracture was not properly aligned during initial healing or if the bone fragments shifted during recovery.

Risk Factors

• Participation in high-impact sports (e.g., running, basketball, soccer)
• Wearing improper or non-supportive footwear
• Conditions that weaken bones, such as osteoporosis
• Advanced age, which may reduce bone density and balance
• Previous foot injuries or fractures
• Inadequate immobilization or non-compliance with initial treatment

Symptoms

• Persistent pain localized to the outer midfoot area of the left foot
• Swelling and bruising around the affected bone
• Difficulty bearing weight or walking on the left foot
• Possible mild deformity due to malunion
• Stiffness or reduced range of motion in the foot

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and alignment. Imaging studies, such as X-rays, are typically used to confirm the malunion and evaluate bone healing. The provider will review the patient’s history of the initial fracture and prior treatment to determine the extent of malunion.

Treatment Options

Treatment may include pain management with medications, physical therapy to improve mobility, and orthotic devices or supportive footwear to reduce stress on the foot. In some cases, surgery may be considered to correct significant malunion and restore proper alignment.

Prognosis and Follow-Up

The prognosis depends on the severity of the malunion and the patient’s response to treatment. Regular follow-up appointments are necessary to monitor healing and adjust management as needed. Most patients experience improved function with appropriate care, though some may have residual symptoms.

Complications

• Chronic pain or discomfort
• Reduced mobility or gait abnormalities
• Increased risk of future fractures due to altered bone structure
• Nerve or tissue damage from malalignment

Lifestyle & Prevention

• Wear supportive, properly fitted footwear to reduce stress on the foot.
• Avoid high-impact activities that may exacerbate symptoms.
• Engage in low-impact exercises, such as swimming or cycling, to maintain fitness without straining the foot.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.

When to Seek Professional Help

Seek medical attention if you experience increasing pain, swelling, or difficulty walking, or if you notice a new deformity in the foot. These symptoms may indicate a worsening condition or complications requiring further evaluation.

Tips for Medical Coders

This code is used for a subsequent encounter for a nondisplaced fracture of the fourth metatarsal bone in the left foot with malunion. Documentation should specify the malunion and confirm the encounter is subsequent to the initial fracture treatment. Ensure the laterality (left foot) and fracture details are clearly recorded to support accurate coding.