S92.346B Nondisplaced fracture of fourth metatarsal bone, unspecified foot, initial encounter for open fracture

Name of the Condition

• Nondisplaced fracture of fourth metatarsal bone, unspecified foot, initial encounter for open fracture
• ICD-10 code: S92.346B

Summary

A nondisplaced fracture of the fourth metatarsal bone is a break in the forefoot bone where the fragments remain in their normal alignment. The "initial encounter for open fracture" indicates this is the first visit for care, and the fracture involves a break in the skin or mucous membranes, exposing the bone.

Causes

Direct trauma to the foot, such as a fall, impact during sports, or a heavy object dropped on the foot, is the primary cause. Open fractures may result from high-energy injuries that penetrate the skin.

Risk Factors

• Participation in high-impact sports (e.g., soccer, basketball)
• 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
• Visible wound or open skin near the fracture site

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. The open nature of the fracture is determined by clinical inspection.

Treatment Options

• Immediate wound care to clean and cover the open fracture
• Immobilization with a cast or splint to maintain alignment
• Antibiotics to prevent infection
• Pain management with NSAIDs or acetaminophen
• Surgical intervention may be required for severe open fractures

Prognosis and Follow-Up

Prognosis depends on the severity of the open fracture and prompt treatment. Most nondisplaced fractures heal well with proper care, but open fractures carry a higher risk of infection. Follow-up visits are necessary to monitor healing and address any complications.

Complications

• Infection at the wound site
• Delayed healing due to open exposure
• Nonunion or malunion of the fracture
• Chronic pain or stiffness in the foot

Lifestyle & Prevention

• Wear supportive footwear during activities
• Gradually increase physical activity to avoid stress fractures
• Maintain bone health through proper nutrition and exercise
• Use protective gear during high-risk sports

When to Seek Professional Help

Seek immediate medical attention if you experience severe foot pain, swelling, or an open wound after an injury. Prompt care is critical for open fractures to reduce infection risk.

Tips for Medical Coders

Document the fracture type (nondisplaced), location (fourth metatarsal, unspecified foot), and encounter type (initial for open fracture). Include details about the open wound, such as size or contamination, to support coding accuracy. Ensure the open fracture is clearly differentiated from a closed fracture in the medical record.