S82.455R Nondisplaced comminuted fracture of shaft of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Name of the Condition

• Nondisplaced comminuted fracture of shaft of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
• ICD-10-CM Code: S82.455R

Summary

A nondisplaced comminuted fracture of the shaft of the left fibula is a bone injury where the fibula is broken into multiple pieces but remains in its normal anatomical alignment. This code applies to a subsequent encounter for an open fracture classified as type IIIA, IIIB, or IIIC, which involves significant soft tissue damage, and the fracture has healed with malunion (abnormal alignment). The term "subsequent encounter" indicates this is a follow-up visit for the fracture, not the initial treatment.

Causes

This fracture typically results from direct trauma to the leg, such as a high-impact injury from a fall, motor vehicle accident, or sports incident, which causes the bone to shatter into several pieces while maintaining alignment. The open nature of the fracture (types IIIA, IIIB, or IIIC) indicates the force was sufficient to penetrate the skin and cause extensive soft tissue damage. Malunion may occur if the fracture fragments heal in an abnormal position, often due to inadequate initial alignment or insufficient immobilization.

Risk Factors

• Participation in high-impact sports or activities
• Osteoporosis or conditions that weaken bone density
• Advanced age, which may reduce bone strength
• Previous leg injuries or surgeries
• Inadequate initial fracture management leading to malunion

Symptoms

• Persistent pain and tenderness along the fibula
• Swelling and bruising around the lower leg
• Difficulty bearing weight on the affected leg
• Visible deformity or instability due to malunion
• Possible limited range of motion in the ankle or knee

Diagnosis

Diagnosis involves a physical examination to assess tenderness, swelling, and deformity, particularly focusing on malunion signs. Imaging tests, such as X-rays or CT scans, are used to confirm the fracture type, assess alignment, and evaluate soft tissue damage. The classification of the open fracture (IIIA, IIIB, or IIIC) is determined by the extent of soft tissue injury, and the presence of malunion is identified through radiographic analysis of bone healing.

Treatment Options

• Orthopedic evaluation to assess malunion and functional impact
• Possible surgical intervention to realign and stabilize the fracture (e.g., internal fixation)
• Pain management with medications
• Physical therapy to restore mobility, strength, and function
• Monitoring for complications related to soft tissue damage or infection

Prognosis and Follow-Up

Prognosis depends on the severity of the malunion and the success of any corrective treatment. Patients may experience long-term functional limitations if malunion affects joint mechanics or leg length. Regular follow-up visits are necessary to monitor healing, assess mobility, and address any persistent symptoms. Rehabilitation is often required to optimize recovery and minimize disability.

Complications

• Chronic pain or discomfort
• Limited mobility or gait abnormalities
• Increased risk of future fractures due to weakened bone structure
• Nerve or vascular damage from the initial injury or malunion
• Infection (if the open fracture was not fully resolved)

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use protective gear during sports or activities to reduce injury risk
• Maintain bone health through a balanced diet rich in calcium and vitamin D
• Engage in low-impact exercises to support bone strength and flexibility
• Follow post-treatment guidelines to prevent re-injury

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe or worsening pain
• Increased swelling, redness, or drainage from the injury site
• Signs of infection (e.g., fever, chills)
• Sudden loss of mobility or sensation in the leg
• New deformity or instability in the leg

Tips for Medical Coders

This code (S82.455R) is specific to a subsequent encounter for an open fracture of the left fibula shaft with malunion, classified as type IIIA, IIIB, or IIIC. Documentation must clearly indicate the fracture type, the presence of malunion, and that this is a follow-up visit (not initial treatment). Ensure the open fracture classification aligns with the extent of soft tissue damage and that the term "malunion" is explicitly documented to support code assignment.