S82.455M Nondisplaced comminuted fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Nondisplaced comminuted fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion
• ICD-10-CM Code: S82.455M

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 is a subsequent encounter, meaning the patient is receiving active treatment for the fracture after the initial healing phase. The fracture is classified as open type I or II, indicating minimal soft tissue damage, and is complicated by nonunion, where the bone fails to heal properly.

Causes

This fracture typically results from direct trauma to the leg, such as a fall, motor vehicle accident, or sports injury, which causes the bone to shatter into several pieces while maintaining alignment. The open nature of the fracture suggests the force was sufficient to break the skin, though soft tissue damage is limited in type I or II cases. Nonunion may occur due to inadequate immobilization, poor blood supply, infection, or other factors that impede healing.

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
• Poor nutrition or smoking, which can affect bone healing

Symptoms

• Persistent pain and tenderness along the fibula
• Swelling and bruising around the lower leg
• Difficulty bearing weight on the affected leg
• Possible deformity or instability of the leg structure
• Visible wound (if open fracture)
• Lack of healing progress over time

Diagnosis

Diagnosis involves a physical examination to assess tenderness, swelling, and deformity. Imaging tests, such as X-rays, are used to confirm the fracture, evaluate bone alignment, and identify nonunion. Additional tests, like CT scans or MRIs, may be performed to assess soft tissue damage or blood supply. The classification of the open fracture (type I or II) and the presence of nonunion are documented based on clinical findings and imaging results.

Treatment Options

• Surgical intervention to stabilize the fracture, such as internal fixation with plates or screws
• Bone grafting to promote healing in cases of nonunion
• Immobilization using a cast or brace to maintain alignment during recovery
• Antibiotics or wound care for open fractures to prevent infection
• Physical therapy to restore mobility and strength after healing

Prognosis and Follow-Up

Prognosis depends on the success of treatment and the patient's overall health. Nonunion may require additional interventions, and recovery time is typically longer than for uncomplicated fractures. Regular follow-up appointments with imaging are necessary to monitor healing progress. Patients may need ongoing rehabilitation to regain full function.

Complications

• Persistent nonunion requiring further surgery
• Infection, especially with open fractures
• Nerve or blood vessel damage
• Chronic pain or instability
• Delayed healing or malunion (improper healing)

Lifestyle & Prevention

• 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
• Use protective gear during sports or activities to reduce injury risk
• Follow post-treatment instructions carefully to promote proper healing

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe pain, swelling, or deformity
• Open wound or visible bone
• Inability to bear weight on the leg
• Signs of infection, such as fever, redness, or pus
• Lack of healing progress over several months

Tips for Medical Coders

When coding S82.455M, ensure documentation supports:

• Nondisplaced comminuted fracture of the left fibula shaft
• Subsequent encounter (active treatment after initial phase)
• Open fracture type I or II (minimal soft tissue damage)
• Nonunion (failure of bone to heal)
• Laterality (left fibula) and anatomical site (shaft)
• Accurate sequencing of codes to reflect the encounter type and complication.