S92.356 Nondisplaced fracture of fifth metatarsal bone, unspecified foot

Name of the Condition

• Technical Term: Nondisplaced fracture of fifth metatarsal bone, unspecified foot
• ICD-10 Code: S92.356
• Common Name: Broken fifth metatarsal (unspecified foot)

Summary

A nondisplaced fracture of the fifth metatarsal bone in an unspecified foot is a break in the long bone on the outer edge of the foot where the bone fragments remain in their normal alignment. This type of fracture typically results from trauma or repetitive stress and may not require surgical intervention, depending on the severity and location. The fifth metatarsal connects the ankle to the fifth toe and is vulnerable to injury during activities involving weight-bearing or sudden impacts.

Causes

Direct trauma to the foot, such as a fall, twist, or impact, is the most common cause. Repetitive stress from activities like running or jumping may also lead to stress fractures over time. Minor injuries, such as stubbing the toe or landing awkwardly, can result in a nondisplaced fracture, especially if the bone is weakened by underlying conditions.

Risk Factors

• Participation in high-impact sports (e.g., 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 and tenderness on the outer edge of the foot
• Swelling or bruising in the affected area
• Difficulty bearing weight or walking
• Minimal deformity, as the fracture is not displaced

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 verify that the bone fragments remain aligned. In some cases, additional imaging (e.g., MRI or CT) may be ordered to evaluate for associated injuries or stress fractures.

Treatment Options

• Rest and reduced activity to allow healing
• Immobilization with a cast, boot, or brace to stabilize the foot
• Pain management with over-the-counter or prescription medications
• Physical therapy to restore strength and mobility once healing progresses
• Follow-up imaging to ensure proper alignment and healing

Prognosis and Follow-Up

Most nondisplaced fractures of the fifth metatarsal heal well with conservative treatment, often within 6–8 weeks. Follow-up appointments are important to monitor healing and adjust treatment as needed. Full recovery may take several months, depending on the individual's activity level and adherence to recommendations.

Complications

• Delayed healing or nonunion if the fracture is not properly immobilized
• Chronic pain or stiffness in the foot
• Increased risk of future fractures due to weakened bone
• Rarely, progression to a displaced fracture if stress continues

Lifestyle & Prevention

• Wear supportive, well-fitting footwear during daily activities and sports
• Gradually increase activity intensity to avoid overuse injuries
• Maintain bone health through a balanced diet rich in calcium and vitamin D
• Use proper technique and protective gear during high-impact activities
• Address any foot pain promptly to prevent further injury

When to Seek Professional Help

Seek medical attention if you experience severe pain, inability to bear weight, or visible deformity after an injury. Persistent swelling, bruising, or pain that does not improve with rest may indicate a more serious issue and requires evaluation.

Tips for Medical Coders

When coding S92.356, ensure the documentation specifies a nondisplaced fracture of the fifth metatarsal bone in an unspecified foot. Verify that the fracture is not displaced and that the foot is not identified as left or right. Confirm the absence of additional details (e.g., open fracture, avulsion) that would require a different code. Accurate documentation of the fracture type and location is essential for correct coding.