S92.311K Displaced fracture of first metatarsal bone, right foot, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced fracture of first metatarsal bone, right foot, subsequent encounter for fracture with nonunion
• ICD-10 Code: S92.311K

Summary

This condition involves a displaced fracture of the first metatarsal bone in the right foot, where the bone fragments have shifted out of alignment. The term "subsequent encounter" indicates this is a follow-up visit for the fracture, and "nonunion" means the bone has failed to heal properly after an expected period. The first metatarsal is a weight-bearing bone critical for foot stability and mobility, and nonunion can lead to persistent symptoms or complications.

Causes

Direct trauma or impact to the right foot is the primary cause, such as a fall, sports injury, or heavy object drop. Nonunion may result from inadequate immobilization, poor blood supply to the bone, infection, or underlying conditions that impair healing (e.g., diabetes, smoking).

Risk Factors

• Participation in high-impact activities (e.g., running, jumping)
• Wearing ill-fitting or non-supportive footwear
• Conditions that weaken bones (e.g., osteoporosis, vitamin D deficiency)
• Poor circulation or smoking, which impairs healing
• Previous foot fractures or surgeries

Symptoms

• Persistent pain at the fracture site, often worsening with activity
• Swelling or tenderness that does not resolve
• Difficulty bearing weight on the right foot
• Possible visible deformity or instability
• Limited range of motion in the big toe or midfoot

Diagnosis

A healthcare provider will assess symptoms, review the injury history, and perform a physical exam. Imaging, such as X-rays or CT scans, confirms the fracture and nonunion by showing a persistent gap or lack of bone healing. Additional tests (e.g., blood work) may evaluate underlying conditions affecting healing.

Treatment Options

Treatment depends on the severity of nonunion and symptoms. Options include:

• Immobilization with a cast or brace to stabilize the bone
• Surgical intervention (e.g., bone grafting, internal fixation) to promote healing
• Pain management with medications or physical therapy
• Addressing underlying factors (e.g., quitting smoking, managing diabetes)

Prognosis and Follow-Up

Prognosis varies; some fractures may heal with treatment, while others require surgery. Regular follow-up visits monitor healing progress, and imaging tracks bone union. Long-term outcomes depend on adherence to treatment and addressing risk factors.

Complications

• Chronic pain or arthritis in the foot
• Persistent instability or deformity
• Infection (if surgery is performed)
• Reduced mobility or difficulty with daily activities

Lifestyle & Prevention

• Wear supportive, properly fitting footwear to reduce injury risk
• Avoid high-impact activities if prone to foot injuries
• Maintain bone health with a balanced diet (calcium, vitamin D) and exercise
• Quit smoking to improve healing capacity
• Follow post-injury care instructions to support recovery

When to Seek Professional Help

Seek care if:

• Pain worsens or does not improve with rest
• Swelling, redness, or drainage occurs (signs of infection)
• Difficulty bearing weight persists
• New deformity or instability develops

Tips for Medical Coders

Document the encounter as a subsequent visit for a fracture with nonunion. Include details on the fracture’s status (e.g., imaging results, clinical assessment of nonunion) and any treatments provided. Ensure the code aligns with the patient’s current clinical presentation and follow-up context.