S92.346 Nondisplaced fracture of fourth metatarsal bone, unspecified foot

Name of the Condition

• Nondisplaced fracture of fourth metatarsal bone, unspecified foot
• ICD-10 code: S92.346

Summary

A nondisplaced fracture of the fourth metatarsal bone is a break in the long bone of the forefoot where the bone fragments remain in their normal alignment. This type of fracture typically results from trauma or repetitive stress and may cause localized pain and swelling. Since the bone is not displaced, it generally heals without surgical intervention if managed appropriately.

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. Stress fractures may also occur from overuse, particularly in activities involving repetitive weight-bearing or sudden increases in physical activity.

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

Symptoms

• Pain localized to the outer midfoot area
• Swelling and bruising around the affected bone
• Difficulty bearing weight or walking on the foot
• Possible tenderness to touch

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are typically used to confirm the fracture and evaluate alignment. In some cases, additional imaging like an MRI may be ordered if a stress fracture is suspected but not visible on X-rays.

Treatment Options

• Rest and limited weight-bearing activities to allow healing
• Immobilization with a cast or boot to maintain proper alignment
• Pain management with NSAIDs or acetaminophen
• Physical therapy to restore strength and mobility once healing progresses

Prognosis and Follow-Up

The prognosis is generally favorable with proper management. Most individuals recover fully within 6–8 weeks, though follow-up care may be needed to monitor healing. Return to normal activities is gradual, with weight-bearing restrictions initially and progression as tolerated.

Complications

• Delayed healing or nonunion if not properly immobilized
• Chronic pain or stiffness in the foot
• Increased risk of future fractures in the same area
• Rarely, infection or nerve damage if the fracture is open or severe

Lifestyle & Prevention

• Wear supportive, well-fitting footwear during activities
• Gradually increase physical activity to avoid overuse injuries
• Maintain bone health through adequate calcium and vitamin D intake
• Use proper technique and protective gear during sports

When to Seek Professional Help

Seek medical attention if you experience severe pain, inability to bear weight, visible deformity, or if symptoms worsen after initial injury. Prompt evaluation is important to rule out more serious injuries or complications.

Tips for Medical Coders

Document the location (unspecified foot) and fracture type (nondisplaced) clearly in the medical record. Ensure the code S92.346 is used when the fracture is confirmed as nondisplaced and the foot is not specified as left or right. Include details about the mechanism of injury, imaging results, and treatment plan to support accurate coding and billing.