S92.316G Nondisplaced fracture of first metatarsal bone, unspecified foot, subsequent encounter for fracture with delayed healing

Name of the Condition

• Nondisplaced fracture of first metatarsal bone, unspecified foot, subsequent encounter for fracture with delayed healing
• ICD-10 Code: S92.316G

Summary

A nondisplaced fracture of the first metatarsal bone is a break in the long bone at the base of the big toe where the bone fragments remain in their normal alignment. This injury is localized to an unspecified foot and is classified as a subsequent encounter for fracture with delayed healing, indicating the fracture has not healed as expected during the normal recovery period. The first metatarsal is the largest and most weight-bearing metatarsal bone, making it susceptible to injury during activities that stress the foot.

Causes

Direct trauma to the foot, such as a fall, sports injury, or dropping a heavy object, is the most common cause. Repetitive stress from activities like running or jumping can also lead to stress fractures over time. Twisting the foot or sudden impact may result in a fracture, particularly in high-impact scenarios. Delayed healing may occur due to factors like poor blood supply, inadequate immobilization, or underlying health conditions affecting bone repair.

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
• Smoking or poor nutrition, which can impair healing
• Certain medications (e.g., corticosteroids) that affect bone health

Symptoms

• Persistent pain and tenderness at the base of the big toe, often lasting beyond the typical healing time
• Swelling and bruising around the affected area that may not resolve as expected
• Difficulty bearing weight or walking on the injured foot
• Possible limited range of motion in the big toe
• Sensation of the fracture not improving with standard treatment

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and mobility. Imaging studies, such as X-rays, are typically used to confirm the fracture and evaluate healing progress. If healing is delayed, additional tests like CT scans or MRIs may be ordered to identify underlying issues. The provider will also review the patient’s medical history and any previous treatments to determine the cause of delayed healing.

Treatment Options

Treatment focuses on promoting healing and may include extended immobilization with a cast or boot, modified weight-bearing instructions, and pain management. Physical therapy may be recommended to restore strength and mobility once healing progresses. In some cases, surgical intervention, such as bone grafting or fixation, may be necessary to stimulate healing. Underlying conditions affecting bone health, like poor nutrition or smoking, will also be addressed.

Prognosis and Follow-Up

With appropriate treatment, most nondisplaced fractures of the first metatarsal eventually heal, though delayed healing may extend recovery time. Regular follow-up appointments are essential to monitor progress through imaging and clinical assessments. Full recovery can take several months, and adherence to treatment plans is critical to avoid long-term complications. Patients should expect gradual improvement in pain and function as healing occurs.

Complications

• Prolonged pain or discomfort
• Chronic instability or weakness in the foot
• Nonunion (failure of the bone to heal)
• Arthritis in the big toe joint due to altered mechanics
• Need for additional interventions, such as surgery
• Increased risk of future fractures in the same area

Lifestyle & Prevention

• Wear supportive, properly fitting footwear during daily activities and sports.
• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Engage in low-impact exercises, like swimming or cycling, to maintain fitness without stressing the foot.
• Address any underlying bone health conditions with a healthcare provider.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to bear weight, or visible deformity. Contact your healthcare provider if pain persists or worsens after initial treatment, or if you notice no improvement in swelling or bruising over time. Early intervention can help address delayed healing and prevent complications.

Tips for Medical Coders

This code (S92.316G) is used for a subsequent encounter for a nondisplaced fracture of the first metatarsal bone with delayed healing. Documentation should specify the fracture’s location (unspecified foot), the fact that it is nondisplaced, and the reason for delayed healing (e.g., poor healing progress, lack of union on imaging). Ensure the encounter is classified as "subsequent" and that the delay in healing is clearly noted to support the code’s use.