S92.345D Nondisplaced fracture of fourth metatarsal bone, left foot, subsequent encounter for fracture with routine healing

Name of the Condition

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

Summary

A nondisplaced fracture of the fourth metatarsal bone in the left foot, with routine healing during a subsequent encounter, refers to a break in the long bone of the forefoot where the bone fragments remain aligned and are progressing normally without complications. This code is used when the patient is being seen for follow-up care after the initial injury, and healing is proceeding as expected.

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 of the left foot
• Swelling and bruising around the affected bone
• Difficulty bearing weight or walking on the left foot
• Possible mild deformity if the fracture is displaced (though nondisplaced fractures typically do not show visible deformity)

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. During a subsequent encounter, imaging may be repeated to assess healing progress and ensure the fracture remains nondisplaced with routine healing.

Treatment Options

Treatment for a nondisplaced fracture of the fourth metatarsal bone often includes immobilization with a cast, boot, or stiff-soled shoe to protect the bone as it heals. Pain management with over-the-counter or prescription medications may be recommended. Weight-bearing restrictions and activity modifications are common initially, with gradual return to normal activities as healing progresses. Physical therapy may be advised to restore strength and mobility.

Prognosis and Follow-Up

With proper treatment and adherence to weight-bearing restrictions, most nondisplaced metatarsal fractures heal within 6 to 8 weeks. Routine follow-up appointments are important to monitor healing and adjust treatment as needed. Full recovery, including return to sports or strenuous activities, may take several months, depending on the individual and the severity of the injury.

Complications

While rare, complications can include delayed healing, nonunion (failure of the bone to heal), or malunion (healing in an abnormal position). Infection is possible if there is an open fracture. Chronic pain or arthritis may develop in some cases, particularly if the fracture was not properly immobilized or if there is underlying joint damage.

Lifestyle & Prevention

Wearing supportive, properly fitting footwear can help reduce the risk of metatarsal fractures. Gradually increasing physical activity and avoiding sudden increases in intensity can prevent stress fractures. Maintaining bone health through a balanced diet rich in calcium and vitamin D, along with regular exercise, may also lower risk. Using protective gear during sports and being mindful of foot placement on uneven surfaces can further reduce injury likelihood.

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or new symptoms such as numbness, tingling, or discoloration develop. If weight-bearing becomes impossible or the foot appears deformed, prompt evaluation is necessary. Follow-up care is essential to ensure proper healing and address any concerns during the recovery process.

Tips for Medical Coders

When coding S92.345D, ensure the documentation specifies a nondisplaced fracture of the fourth metatarsal bone in the left foot, with a subsequent encounter for fracture and routine healing. The "subsequent encounter" modifier indicates the patient is being seen for follow-up after the initial injury, and "routine healing" confirms no complications or delayed union. Verify that the encounter aligns with the healing phase and that all elements of the code (anatomical site, laterality, and encounter type) are clearly documented.